“Groombridge 34”的意思、由来-开放百科全书

}}{{Starbox detail
| component1 = Groombridge 34 A
| mass = {{val|0.38|0.05}}^[18]
| radius = {{val|0.38|0.05}}^[18]
| luminosity = ~0.022^[18]
| temperature = {{val|3,607|68}}^[18]
| gravity = {{val|4.87|0.04}}^[18]
| metal_fe = {{val|-0.34|0.09}}^[18]
| rotational_velocity = {{val|1.09|0.79}}^[18]
| rotation = {{val|43.86|0.56}} days^[18]
| age_gyr = ~3.02^[3]
| habitable_inner=0.112^[27] AU
| habitable_outer=0.239^[27] AU
| component2 = Groombridge 34 B
| mass2 = {{val|0.15|0.02}}^[18]
| radius2 = {{val|0.18|0.03}}^[18]
| luminosity2 = ~8.5{{e|-4}}^[18]
| metal2_fe = {{val|−0.37|0.10}}^[3]
| temperature2= {{val|3,304|70}}^[18]
| gravity2 = {{val|5.08|0.15}}^[18]
| habitable_inner2=0.048^[27] AU
| habitable_outer2=0.103^[27] AU
| age_gyr2 = ~2.754^[3]
}}{{Starbox catalog
| names=GX/GQ Andromedae, BD+43° 44, GCTP 49, GJ 15 A/B, G 171-047/171-048, HD 1326, HIP 1475, LHS 3/4, LTT 10108/10109, SAO 36248.^[38]
}}{{Starbox reference
| Simbad = GX+And | sn=GJ 15 A
| Simbad2 = GJ+15+Ab | sn2=GJ 15 Ab
| Simbad3 = GQ+And | sn3=GJ 15 B
| ARICNS = 00026 | an=GJ 15 A
| ARICNS2 = 00027 | an2=GJ 15 B
}}{{Starbox end}}

Groombridge 34 is a binary star system in the northern constellation of Andromeda. It was listed as entry number 34 in A Catalogue of Circumpolar Stars, published posthumously in 1838 by British astronomer Stephen Groombridge.^[39] Based upon parallax measurements taken by the Gaia spacecraft, the system is located about 11.6 light-years from the Sun. This positions the pair among the nearest stars to the Solar System.

Both components are small, dim red dwarf stars that are too faint to be seen with the naked eye. They orbit around their common barycenter in a nearly circular orbit with a separation of about 147 AU and a period of around 2,600 years.^[17] Both stars exhibit random variation in luminosity due to flares and they have been given variable star designations: the brighter member Groombridge 34 A is designated GX And, while the smaller component is designated GQ And.^[41]

The star system has a relatively high proper motion of 2.9 arc seconds per year,^[42] and is moving away from the Solar System at a velocity of 11.6 km/s.^[10] It achieved perihelion some 15,000 years ago when it came within {{Convert|3.5|pc|ly|abbr=on|lk=off|order=flip}} of the Sun.^[42]

GX Andromedae

The most massive and luminous component of the pair has the variable star designation GX Andromedae. It is a main sequence red dwarf star of spectral type M1.4^[3] that varies his brightness due to stellar flares. Gaia observations suggest a rotation period of 44 days and a magnetic activity cycle of roughly 9 years.^[46]

GQ Andromedae

The smaller companion bears the variable star name GQ Andromedae. It's a red dwarf main sequence star that undergoes flare events like the primary; it has a spectral type M4.1^[3], so it has also a lower effective temperature.

Planetary system

In August 2014, a planet orbiting around Groombridge 34 A was reported.^[48] The planet's existence was deduced from analysis of the radial velocities of the parent Star by the Eta-Earth Survey using HIRES at Keck Observatory. At the time of its discovery, it was the sixth-nearest known exoplanet.

Using the CARMENES spectrograph combined with the measurements of the HARPS and HIRES spectrographs, researchers failed to detect the purported Groombridge 34 Ab. However, they did propose another that another planet (Groombridge 34 Ac, GJ 15 Ac) could be orbiting the parent star.^[1]

This discrepancy was later reconciled with new HIRES observations, covering a longer span of time, where both planets were recovered, constraining their minimum mass to 3.03 {{Earth mass|link=yes}} for Groombridge 34 Ab and 36 {{Earth mass}} for Groombridge Ac. Their orbital period are 11.4 and 7,400 days, respectively. To date, this is the multi-planet system closest to our Sun.^[18]

See also

References

1. ^{{cite journal|doi=10.1051/0004-6361/201731442|title=The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems|journal=Astronomy & Astrophysics|volume=609|pages=A117|year=2018|last1=Trifonov|first1=T|last2=Kürster|first2=M|last3=Zechmeister|first3=M|last4=Tal-Or|first4=L|last5=Caballero|first5=J|last6=Quirrenbach|first6=A|last7=Ribas|first7=I|last8=Reiners|first8=A|arxiv=1710.01595|bibcode=2018A&A...609A.117T}}
2. ^¹²³⁴⁵{{cite DR2|385334196532776576}}
3. ^¹{{citation | display-authors=1 | last1=Howard | first1=Andrew W. | last2=Marcy | first2=Geoffrey W. | last3=Fischer | first3=Debra A. | last4=Isaacson | first4=Howard | last5=Muirhead | first5=Philip S. | last6=Henry | first6=Gregory W. | last7=Boyajian | first7=Tabetha S. | last8=von Braun | first8=Kaspar | last9=Becker | first9=Juliette C. | last10=Wright | first10=Jason T. | last11=Johnson | first11=John Asher | title=The NASA-UC-UH ETA-Earth Program. IV. A Low-mass Planet Orbiting an M Dwarf 3.6 PC from Earth | journal=The Astrophysical Journal | date=October 2014 | volume=794 | issue=1 | id=51 | pages=9 | doi=10.1088/0004-637X/794/1/51 | bibcode=2014ApJ...794...51H | arxiv=1408.5645 | postscript=.}}
4. ^¹²³⁴⁵⁶⁷⁸{{citation | display-authors=1 | last1=Mann | first1=Andrew W. | last2=Feiden | first2=Gregory A. | last3=Gaidos | first3=Eric | last4=Boyajian | first4=Tabetha | last5=von Braun | first5=Kaspar | title=How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius | journal=The Astrophysical Journal | volume=804 | issue=1 | id=64 | pages=38 | date=May 2015 | doi=10.1088/0004-637X/804/1/64 | bibcode=2015ApJ...804...64M | arxiv=1501.01635 | postscript=. }}
5. ^¹{{cite simbad | title=V* GX And | access-date=2016-02-09 | postscript=. }}
6. ^¹²{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data. SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=. }}
7. ^¹²{{citation | display-authors=1 | last1=Nidever | first1=David L. | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul | last4=Fischer | first4=Debra A. | last5=Vogt | first5=Steven S. | title=Radial Velocities for 889 Late-Type Stars | journal=The Astrophysical Journal Supplement Series | volume=141 | issue=2 | pages=503–522 | date=August 2002 | arxiv=astro-ph/0112477 | bibcode=2002ApJS..141..503N | doi=10.1086/340570 | postscript=. }}
8. ^¹{{citation | first1=Stephen | last1=Groombridge | year=1838 | editor1-first=George Biddell | editor1-last=Airy | title=A Catalogue of Circumpolar Stars | page=2 | publisher=J. Murray | url=https://books.google.com/books?id=REgwAAAAYAAJ&pg=PA2 | postscript=. }}
9. ^¹²{{citation | title=Parallax and orbital motion of the two nearby long period visual binaries Groombridge 34 and ADS 9090. | last1=Lippincott | first1=S. L. | journal=Astronomical Journal | volume=77 | pages=165–168 | date=March 1972 | doi=10.1086/111261 | bibcode=1972AJ.....77..165L | postscript=. }}
10. ^¹{{citation | title=Catalogue des étoiles variables ou suspectes dans le voisinage du Soleil | last1=Petit | first1=M. | language=French | journal=Astronomy and Astrophysics Supplement | volume=85 | issue=2 | page=971 | date=October 1990 | bibcode=1990A&AS...85..971P | postscript=. }}
11. ^¹²{{cite journal | title=Close encounters of the stellar kind | last1=Bailer-Jones | first1=C. A. L. | journal=Astronomy & Astrophysics | volume=575 | id=A35 | pages=13 | date=March 2015 | doi=10.1051/0004-6361/201425221 | bibcode=2015A&A...575A..35B | arxiv = 1412.3648 }}
12. ^¹²³⁴{{citation | display-authors=1 | last1=Cantrell | first1=Justin R. | last2=Henry | first2=Todd J. | last3=White | first3=Russel J. | title=The Solar Neighborhood XXIX: The Habitable Real Estate of Our Nearest Stellar Neighbors | journal=The Astronomical Journal | volume=146 | issue=4 | page=99 | date=October 2013 | doi=10.1088/0004-6256/146/4/99 | bibcode=2013AJ....146...99C | arxiv=1307.7038 | postscript=. }}
13. ^¹{{cite journal|bibcode=2018MNRAS.476.5408M|title=Spotting stellar activity cycles in Gaia astrometry|journal=Monthly Notices of the Royal Astronomical Society|volume=476|issue=4|pages=5408|last1=Morris|first1=Brett M.|last2=Agol|first2=Eric|last3=Davenport|first3=James R. A.|last4=Hawley|first4=Suzanne L.|year=2018}}
14. ^¹²³⁴⁵⁶⁷⁸⁹¹⁰¹¹¹²¹³¹⁴¹⁵{{cite journal|bibcode=2018A&A...617A.104P|title=The HADES RV Programme with HARPS-N at TNG. VIII. GJ15A: A multiple wide planetary system sculpted by binary interaction|journal=Astronomy and Astrophysics|volume=617|pages=A104|last1=Pinamonti|first1=M.|last2=Damasso|first2=M.|last3=Marzari|first3=F.|last4=Sozzetti|first4=A.|last5=Desidera|first5=S.|last6=Maldonado|first6=J.|last7=Scandariato|first7=G.|last8=Affer|first8=L.|last9=Lanza|first9=A. F.|last10=Bignamini|first10=A.|last11=Bonomo|first11=A. S.|last12=Borsa|first12=F.|last13=Claudi|first13=R.|last14=Cosentino|first14=R.|last15=Giacobbe|first15=P.|last16=González-Álvarez|first16=E.|last17=González Hernández|first17=J. I.|last18=Gratton|first18=R.|last19=Leto|first19=G.|last20=Malavolta|first20=L.|last21=Martinez Fiorenzano|first21=A.|last22=Micela|first22=G.|last23=Molinari|first23=E.|last24=Pagano|first24=I.|last25=Pedani|first25=M.|last26=Perger|first26=M.|last27=Piotto|first27=G.|last28=Rebolo|first28=R.|last29=Ribas|first29=I.|last30=Suárez Mascareño|first30=A.|displayauthors=29|year=2018|arxiv=1804.03476|doi=10.1051/0004-6361/201732535}}

词条	Groombridge 34
释义	GX Andromedae GQ Andromedae Planetary system See also References External links {{Starbox begin \| name = Groombridge 34 }}{{Starbox observe 2s \| epoch = J2000 \| constell = Andromeda \| component1 = Groombridge 34 A \| ra1 = {{RA\|00\|18\|22.8850}} \| dec1 = {{DEC\|+44\|01\|22.6373}} \| appmag_v1 = 8.119^[3] \| component2 = Groombridge 34 B \| ra2 = {{RA\|00\|18\|25.8244}}^[4] \| dec2 = {{DEC\|+44\|01\|38.0912}}^[4] \| appmag_v2 = 11.007^[3] }}{{Starbox character \| class = {{nowrap\|M1.4V + M4.1V}}^[3] \| b-v = +1.56/+1.80^[8] \| u-b = +1.24/+1.40^[8] \| variable = Flare stars }}{{Starbox astrometry \| component1 = Groombridge 34 A \| radial_v = {{Val\|+11.62\|0.08}}^[10] \| prop_mo_ra = {{val\|2891.525\|0.061}} \| prop_mo_dec = {{val\|411.903\|0.034}} \| parallax = 280.6902 \| p_error = 0.0429 \| parallax_footnote = \| absmag_v = \| component2 = Groombridge 34 B \| radial_v2 = \| prop_mo_ra2 = {{val\|2863.284\|0.069}}^[4] \| prop_mo_dec2 = {{val\|336.529\|0.039}}^[4] \| parallax2 = 280.7866 \| p_error2 = 0.0519 \| parallax_footnote2 = ^[4] \| absmag_v2 = }}{{Starbox visbin \| reference = ^[17] \| name=Groombridge 34 B \| period=2,600 \| axis=41.15 \| eccentricity=0.00 \| inclination=61.4 \| node=45.3 \| periastron=1745 }}{{Starbox detail \| component1 = Groombridge 34 A \| mass = {{val\|0.38\|0.05}}^[18] \| radius = {{val\|0.38\|0.05}}^[18] \| luminosity = ~0.022^[18] \| temperature = {{val\|3,607\|68}}^[18] \| gravity = {{val\|4.87\|0.04}}^[18] \| metal_fe = {{val\|-0.34\|0.09}}^[18] \| rotational_velocity = {{val\|1.09\|0.79}}^[18] \| rotation = {{val\|43.86\|0.56}} days^[18] \| age_gyr = ~3.02^[3] \| habitable_inner=0.112^[27] AU \| habitable_outer=0.239^[27] AU \| component2 = Groombridge 34 B \| mass2 = {{val\|0.15\|0.02}}^[18] \| radius2 = {{val\|0.18\|0.03}}^[18] \| luminosity2 = ~8.5{{e\|-4}}^[18] \| metal2_fe = {{val\|−0.37\|0.10}}^[3] \| temperature2= {{val\|3,304\|70}}^[18] \| gravity2 = {{val\|5.08\|0.15}}^[18] \| habitable_inner2=0.048^[27] AU \| habitable_outer2=0.103^[27] AU \| age_gyr2 = ~2.754^[3] }}{{Starbox catalog \| names=GX/GQ Andromedae, BD+43° 44, GCTP 49, GJ 15 A/B, G 171-047/171-048, HD 1326, HIP 1475, LHS 3/4, LTT 10108/10109, SAO 36248.^[38] }}{{Starbox reference \| Simbad = GX+And \| sn=GJ 15 A \| Simbad2 = GJ+15+Ab \| sn2=GJ 15 Ab \| Simbad3 = GQ+And \| sn3=GJ 15 B \| ARICNS = 00026 \| an=GJ 15 A \| ARICNS2 = 00027 \| an2=GJ 15 B }}{{Starbox end}} Groombridge 34 is a binary star system in the northern constellation of Andromeda. It was listed as entry number 34 in A Catalogue of Circumpolar Stars, published posthumously in 1838 by British astronomer Stephen Groombridge.^[39] Based upon parallax measurements taken by the Gaia spacecraft, the system is located about 11.6 light-years from the Sun. This positions the pair among the nearest stars to the Solar System. Both components are small, dim red dwarf stars that are too faint to be seen with the naked eye. They orbit around their common barycenter in a nearly circular orbit with a separation of about 147 AU and a period of around 2,600 years.^[17] Both stars exhibit random variation in luminosity due to flares and they have been given variable star designations: the brighter member Groombridge 34 A is designated GX And, while the smaller component is designated GQ And.^[41] The star system has a relatively high proper motion of 2.9 arc seconds per year,^[42] and is moving away from the Solar System at a velocity of 11.6 km/s.^[10] It achieved perihelion some 15,000 years ago when it came within {{Convert\|3.5\|pc\|ly\|abbr=on\|lk=off\|order=flip}} of the Sun.^[42] GX Andromedae The most massive and luminous component of the pair has the variable star designation GX Andromedae. It is a main sequence red dwarf star of spectral type M1.4^[3] that varies his brightness due to stellar flares. Gaia observations suggest a rotation period of 44 days and a magnetic activity cycle of roughly 9 years.^[46] GQ Andromedae The smaller companion bears the variable star name GQ Andromedae. It's a red dwarf main sequence star that undergoes flare events like the primary; it has a spectral type M4.1^[3], so it has also a lower effective temperature. Planetary system In August 2014, a planet orbiting around Groombridge 34 A was reported.^[48] The planet's existence was deduced from analysis of the radial velocities of the parent Star by the Eta-Earth Survey using HIRES at Keck Observatory. At the time of its discovery, it was the sixth-nearest known exoplanet. Using the CARMENES spectrograph combined with the measurements of the HARPS and HIRES spectrographs, researchers failed to detect the purported Groombridge 34 Ab. However, they did propose another that another planet (Groombridge 34 Ac, GJ 15 Ac) could be orbiting the parent star.^[1] This discrepancy was later reconciled with new HIRES observations, covering a longer span of time, where both planets were recovered, constraining their minimum mass to 3.03 {{Earth mass\|link=yes}} for Groombridge 34 Ab and 36 {{Earth mass}} for Groombridge Ac. Their orbital period are 11.4 and 7,400 days, respectively. To date, this is the multi-planet system closest to our Sun.^[18] {{OrbitboxPlanet begin \|name=Groombridge 34 A \| table_ref = ^[18] }}{{OrbitboxPlanet \| exoplanet = Ab \| mass_earth = ≥ {{val\|3.03\|0.46\|0.44}} \| period = {{val\|11.4407\|0.0017\|0.0016}} \| semimajor = {{val\|0.072\|0.003\|0.004}} \| eccentricity = {{val\|0.094\|0.091\|0.065}} }}{{OrbitboxPlanet \| exoplanet = Ac \| mass_earth = ≥ {{val\|36\|25\|18}} \| period = ~7,600 \| semimajor = {{val\|5.4\|1.0\|0.9}} \| eccentricity = {{val\|0.27\|0.28\|0.19}} }}{{Orbitbox end}} See also Groombridge 34 in fiction List of nearest stars References 1. ^{{cite journal\|doi=10.1051/0004-6361/201731442\|title=The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems\|journal=Astronomy & Astrophysics\|volume=609\|pages=A117\|year=2018\|last1=Trifonov\|first1=T\|last2=Kürster\|first2=M\|last3=Zechmeister\|first3=M\|last4=Tal-Or\|first4=L\|last5=Caballero\|first5=J\|last6=Quirrenbach\|first6=A\|last7=Ribas\|first7=I\|last8=Reiners\|first8=A\|arxiv=1710.01595\|bibcode=2018A&A...609A.117T}} 2. ^¹²³⁴⁵{{cite DR2\|385334196532776576}} 3. ^¹{{citation \| display-authors=1 \| last1=Howard \| first1=Andrew W. \| last2=Marcy \| first2=Geoffrey W. \| last3=Fischer \| first3=Debra A. \| last4=Isaacson \| first4=Howard \| last5=Muirhead \| first5=Philip S. \| last6=Henry \| first6=Gregory W. \| last7=Boyajian \| first7=Tabetha S. \| last8=von Braun \| first8=Kaspar \| last9=Becker \| first9=Juliette C. \| last10=Wright \| first10=Jason T. \| last11=Johnson \| first11=John Asher \| title=The NASA-UC-UH ETA-Earth Program. IV. A Low-mass Planet Orbiting an M Dwarf 3.6 PC from Earth \| journal=The Astrophysical Journal \| date=October 2014 \| volume=794 \| issue=1 \| id=51 \| pages=9 \| doi=10.1088/0004-637X/794/1/51 \| bibcode=2014ApJ...794...51H \| arxiv=1408.5645 \| postscript=.}} 4. ^¹²³⁴⁵⁶⁷⁸{{citation \| display-authors=1 \| last1=Mann \| first1=Andrew W. \| last2=Feiden \| first2=Gregory A. \| last3=Gaidos \| first3=Eric \| last4=Boyajian \| first4=Tabetha \| last5=von Braun \| first5=Kaspar \| title=How to Constrain Your M Dwarf: Measuring Effective Temperature, Bolometric Luminosity, Mass, and Radius \| journal=The Astrophysical Journal \| volume=804 \| issue=1 \| id=64 \| pages=38 \| date=May 2015 \| doi=10.1088/0004-637X/804/1/64 \| bibcode=2015ApJ...804...64M \| arxiv=1501.01635 \| postscript=. }} 5. ^¹{{cite simbad \| title=V* GX And \| access-date=2016-02-09 \| postscript=. }} 6. ^¹²{{citation \| last1=Mermilliod \| first1=J.-C. \| title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) \| journal=Catalogue of Eggen's UBV Data. SIMBAD \| date=1986 \| bibcode=1986EgUBV........0M \| postscript=. }} 7. ^¹²{{citation \| display-authors=1 \| last1=Nidever \| first1=David L. \| last2=Marcy \| first2=Geoffrey W. \| last3=Butler \| first3=R. Paul \| last4=Fischer \| first4=Debra A. \| last5=Vogt \| first5=Steven S. \| title=Radial Velocities for 889 Late-Type Stars \| journal=The Astrophysical Journal Supplement Series \| volume=141 \| issue=2 \| pages=503–522 \| date=August 2002 \| arxiv=astro-ph/0112477 \| bibcode=2002ApJS..141..503N \| doi=10.1086/340570 \| postscript=. }} 8. ^¹{{citation \| first1=Stephen \| last1=Groombridge \| year=1838 \| editor1-first=George Biddell \| editor1-last=Airy \| title=A Catalogue of Circumpolar Stars \| page=2 \| publisher=J. Murray \| url=https://books.google.com/books?id=REgwAAAAYAAJ&pg=PA2 \| postscript=. }} 9. ^¹²{{citation \| title=Parallax and orbital motion of the two nearby long period visual binaries Groombridge 34 and ADS 9090. \| last1=Lippincott \| first1=S. L. \| journal=Astronomical Journal \| volume=77 \| pages=165–168 \| date=March 1972 \| doi=10.1086/111261 \| bibcode=1972AJ.....77..165L \| postscript=. }} 10. ^¹{{citation \| title=Catalogue des étoiles variables ou suspectes dans le voisinage du Soleil \| last1=Petit \| first1=M. \| language=French \| journal=Astronomy and Astrophysics Supplement \| volume=85 \| issue=2 \| page=971 \| date=October 1990 \| bibcode=1990A&AS...85..971P \| postscript=. }} 11. ^¹²{{cite journal \| title=Close encounters of the stellar kind \| last1=Bailer-Jones \| first1=C. A. L. \| journal=Astronomy & Astrophysics \| volume=575 \| id=A35 \| pages=13 \| date=March 2015 \| doi=10.1051/0004-6361/201425221 \| bibcode=2015A&A...575A..35B \| arxiv = 1412.3648 }} 12. ^¹²³⁴{{citation \| display-authors=1 \| last1=Cantrell \| first1=Justin R. \| last2=Henry \| first2=Todd J. \| last3=White \| first3=Russel J. \| title=The Solar Neighborhood XXIX: The Habitable Real Estate of Our Nearest Stellar Neighbors \| journal=The Astronomical Journal \| volume=146 \| issue=4 \| page=99 \| date=October 2013 \| doi=10.1088/0004-6256/146/4/99 \| bibcode=2013AJ....146...99C \| arxiv=1307.7038 \| postscript=. }} 13. ^¹{{cite journal\|bibcode=2018MNRAS.476.5408M\|title=Spotting stellar activity cycles in Gaia astrometry\|journal=Monthly Notices of the Royal Astronomical Society\|volume=476\|issue=4\|pages=5408\|last1=Morris\|first1=Brett M.\|last2=Agol\|first2=Eric\|last3=Davenport\|first3=James R. A.\|last4=Hawley\|first4=Suzanne L.\|year=2018}} 14. ^¹²³⁴⁵⁶⁷⁸⁹¹⁰¹¹¹²¹³¹⁴¹⁵{{cite journal\|bibcode=2018A&A...617A.104P\|title=The HADES RV Programme with HARPS-N at TNG. VIII. GJ15A: A multiple wide planetary system sculpted by binary interaction\|journal=Astronomy and Astrophysics\|volume=617\|pages=A104\|last1=Pinamonti\|first1=M.\|last2=Damasso\|first2=M.\|last3=Marzari\|first3=F.\|last4=Sozzetti\|first4=A.\|last5=Desidera\|first5=S.\|last6=Maldonado\|first6=J.\|last7=Scandariato\|first7=G.\|last8=Affer\|first8=L.\|last9=Lanza\|first9=A. F.\|last10=Bignamini\|first10=A.\|last11=Bonomo\|first11=A. S.\|last12=Borsa\|first12=F.\|last13=Claudi\|first13=R.\|last14=Cosentino\|first14=R.\|last15=Giacobbe\|first15=P.\|last16=González-Álvarez\|first16=E.\|last17=González Hernández\|first17=J. I.\|last18=Gratton\|first18=R.\|last19=Leto\|first19=G.\|last20=Malavolta\|first20=L.\|last21=Martinez Fiorenzano\|first21=A.\|last22=Micela\|first22=G.\|last23=Molinari\|first23=E.\|last24=Pagano\|first24=I.\|last25=Pedani\|first25=M.\|last26=Perger\|first26=M.\|last27=Piotto\|first27=G.\|last28=Rebolo\|first28=R.\|last29=Ribas\|first29=I.\|last30=Suárez Mascareño\|first30=A.\|displayauthors=29\|year=2018\|arxiv=1804.03476\|doi=10.1051/0004-6361/201732535}} ^[2]^[3]^[4]^[5]^[6]^[7]^[8]^[9]^[10]^[11]^[12]^[13]^[14] }} External links SolStation entry www.richweb.f9.co.uk/ Image Groombridge 34 [https://web.archive.org/web/20120513202710/http://www.chara.gsu.edu/RECONS/TOP100.posted.htm The One Hundred Nearest Star Systems, RECONS] {{nearest systems\|3}}{{Stars of Andromeda}} 11 : Andromeda (constellation)\|Flare stars\|M-type main-sequence stars\|Binary stars\|Henry Draper Catalogue objects\|Hipparcos objects\|Gliese and GJ objects\|Groombridge objects\|Durchmusterung objects\|Local Bubble\|Objects with variable star designations
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GX Andromedae

GQ Andromedae

Planetary system

See also

References

External links