“Delta2 Gruis”的意思、由来-开放百科全书

This is an evolved red giant star with a stellar classification of M4.5 IIIa.^[4] It is a pulsating variable with multiple periods, including 20.6, 24.1, 24.5, and 32.3 days. The strongest period is 33.3 days with an amplitude of 0.043 magnitude.^[19] It has a magnitude 9.71 visual companion at an angular separation of 60.4 arc seconds along a position angle of 210°, as of 2013.^[20]

1. ^¹²{{Citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32| issue=11| pages=759–771| date=November 2006 | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | postscript=. }}
2. ^¹{{citation | display-authors=1 | title=Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics | last1=Zamanov | first1=R. K. | last2=Bode | first2=M. F. | last3=Melo | first3=C. H. F. | last4=Stateva | first4=I. K. | last5=Bachev | first5=R. | last6=Gomboc | first6=A. | last7=Konstantinova-Antova | first7=R. | last8=Stoyanov | first8=K. A. | journal=Monthly Notices of the Royal Astronomical Society | volume=390 | issue=1 | pages=377–382 | date=October 2008 | doi=10.1111/j.1365-2966.2008.13751.x | bibcode=2008MNRAS.390..377Z | arxiv=0807.3817 | postscript=. }}
3. ^¹{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
4. ^¹²³⁴{{citation | last1=Nicolet | first1=B. | date=1978 | title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System | journal=Astronomy and Astrophysics Supplement Series | volume=34 | pages=1–49 | postscript=. | bibcode=1978A&AS...34....1N }}
5. ^¹²³{{citation | display-authors=1 | last1=Park | first1=Sunkyung | last2=Kang | first2=Wonseok | last3=Lee | first3=Jeong-Eun | last4=Lee | first4=Sang-Gak | title=Wilson-Bappu Effect: Extended to Surface Gravity | journal=The Astronomical Journal | volume=146 | issue=4 | pages=73 | year=2013 | doi=10.1088/0004-6256/146/4/73 | bibcode=2013AJ....146...73P | arxiv=1307.0592 | postscript=. }}
6. ^¹{{citation | title=Long-term photometry and periods for 261 nearby pulsating M giants | last=Tabur | first=V. | last2=Bedding | first2=T. R. | author2-link=Tim Bedding | journal=Monthly Notices of the Royal Astronomical Society | volume= 400 | issue =4 | pages=1945–61 | year=2009 | doi=10.1111/j.1365-2966.2009.15588.x | arxiv=0908.3228 | bibcode = 2009MNRAS.400.1945T | postscript=. }}
7. ^¹{{citation | display-authors=1 | last1=Mason | first1=B. D. | last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I. | last4=Douglass | first4=G. G. | last5=Worley | first5=C. E. | title=The Washington Visual Double Star Catalog | year=2014 | bibcode=2001AJ....122.3466M | url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds | accessdate=2015-07-22 | doi=10.1086/323920 | volume=122 | journal=The Astronomical Journal | pages=3466–3471}}
8. ^¹{{cite simbad | title=del02 Gru | accessdate=2017-08-18 | postscript=. }}

词条	Delta2 Gruis
释义	References {{DISPLAYTITLE:Delta² Gruis}}{{other stars by Bayer designation\|Delta Gruis{{!}}δ Gruis}}{{Starbox begin \| name = Delta² Gruis }}{{Starbox observe \| epoch = J2000.0 \| equinox = J2000.0 (ICRS) \| constell = Grus \| ra = {{RA\|22\|29\|45.43402}} \| dec = {{DEC\|−43\|44\|57.1968}} \| appmag_v = 4.11^[3] }}{{Starbox character \| class = M4.5 IIIa^[4] \| b-v = +1.57^[3] \| u-b = +1.71^[3] \| variable = }}{{Starbox astrometry \| radial_v = {{Val\|+2.7\|0.8}}^[7] \| prop_mo_ra = −14.08 \| prop_mo_dec = +2.57 \| parallax = 9.88 \| p_error = 0.23 \| parallax_footnote = \| absmag_v = {{Val\|−0.90\|0.05}}^[4] }}{{Starbox detail \| source = \| mass = \| radius = \| luminosity = \| temperature = \| gravity = \| metal_fe = \| rotational_velocity = {{Val\|+4.5\|0.8}}^[12] \| age_myr = }}{{Starbox catalog \| names = {{odlist \| B=δ² Gru \| CD=−44° 14935 \| FK5= \| HD=213080 \| HIP=111043 \| HR=8560 \| SAO=231161 \| WDS=J22298-4345A }}^[13] }}{{Starbox reference \| Simbad = del2+Gru }}{{Starbox end}}Delta² Gruis, Latinized from δ² Gruis, is a solitary,^[14] red-hued star in the southern constellation of Grus. It is visible to the naked eye with an apparent visual magnitude of 4.11. ^[3] Based upon an annual parallax shift of 9.88 mas as seen from the Earth, the star is located around 330 light years from the Sun. It is moving further away from the Sun with a radial velocity of +3 km/s.^[7] This is an evolved red giant star with a stellar classification of M4.5 IIIa.^[4] It is a pulsating variable with multiple periods, including 20.6, 24.1, 24.5, and 32.3 days. The strongest period is 33.3 days with an amplitude of 0.043 magnitude.^[19] It has a magnitude 9.71 visual companion at an angular separation of 60.4 arc seconds along a position angle of 210°, as of 2013.^[20] References 1. ^¹²{{Citation \| last1=Gontcharov \| first1=G. A. \| title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system \| journal=Astronomy Letters \| volume=32\| issue=11\| pages=759–771\| date=November 2006 \| doi=10.1134/S1063773706110065 \| bibcode=2006AstL...32..759G \| arxiv=1606.08053 \| postscript=. }} 2. ^¹{{citation \| display-authors=1 \| title=Rotational velocities of the giants in symbiotic stars - III. Evidence of fast rotation in S-type symbiotics \| last1=Zamanov \| first1=R. K. \| last2=Bode \| first2=M. F. \| last3=Melo \| first3=C. H. F. \| last4=Stateva \| first4=I. K. \| last5=Bachev \| first5=R. \| last6=Gomboc \| first6=A. \| last7=Konstantinova-Antova \| first7=R. \| last8=Stoyanov \| first8=K. A. \| journal=Monthly Notices of the Royal Astronomical Society \| volume=390 \| issue=1 \| pages=377–382 \| date=October 2008 \| doi=10.1111/j.1365-2966.2008.13751.x \| bibcode=2008MNRAS.390..377Z \| arxiv=0807.3817 \| postscript=. }} 3. ^¹{{citation \| last1=Eggleton \| first1=P. P. \| last2=Tokovinin \| first2=A. A. \| title=A catalogue of multiplicity among bright stellar systems \| journal=Monthly Notices of the Royal Astronomical Society \| volume=389 \| issue=2 \| pages=869–879 \| date=September 2008 \| doi=10.1111/j.1365-2966.2008.13596.x \| bibcode=2008MNRAS.389..869E \| arxiv=0806.2878 \| postscript=. }} 4. ^¹²³⁴{{citation \| last1=Nicolet \| first1=B. \| date=1978 \| title=Photoelectric photometric Catalogue of homogeneous measurements in the UBV System \| journal=Astronomy and Astrophysics Supplement Series \| volume=34 \| pages=1–49 \| postscript=. \| bibcode=1978A&AS...34....1N }} 5. ^¹²³{{citation \| display-authors=1 \| last1=Park \| first1=Sunkyung \| last2=Kang \| first2=Wonseok \| last3=Lee \| first3=Jeong-Eun \| last4=Lee \| first4=Sang-Gak \| title=Wilson-Bappu Effect: Extended to Surface Gravity \| journal=The Astronomical Journal \| volume=146 \| issue=4 \| pages=73 \| year=2013 \| doi=10.1088/0004-6256/146/4/73 \| bibcode=2013AJ....146...73P \| arxiv=1307.0592 \| postscript=. }} 6. ^¹{{citation \| title=Long-term photometry and periods for 261 nearby pulsating M giants \| last=Tabur \| first=V. \| last2=Bedding \| first2=T. R. \| author2-link=Tim Bedding \| journal=Monthly Notices of the Royal Astronomical Society \| volume= 400 \| issue =4 \| pages=1945–61 \| year=2009 \| doi=10.1111/j.1365-2966.2009.15588.x \| arxiv=0908.3228 \| bibcode = 2009MNRAS.400.1945T \| postscript=. }} 7. ^¹{{citation \| display-authors=1 \| last1=Mason \| first1=B. D. \| last2=Wycoff \| first2=G. L. \| last3=Hartkopf \| first3=W. I. \| last4=Douglass \| first4=G. G. \| last5=Worley \| first5=C. E. \| title=The Washington Visual Double Star Catalog \| year=2014 \| bibcode=2001AJ....122.3466M \| url=http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds \| accessdate=2015-07-22 \| doi=10.1086/323920 \| volume=122 \| journal=The Astronomical Journal \| pages=3466–3471}} 8. ^¹{{cite simbad \| title=del02 Gru \| accessdate=2017-08-18 \| postscript=. }} ^[1]^[2]^[3]^[4]^[5]^[6]^[7]^[8] }}{{Stars of Grus\|state=collapsed}} 8 : M-type giants\|Semiregular variable stars\|Grus (constellation)\|Bayer objects\|Durchmusterung objects\|Henry Draper Catalogue objects\|Hipparcos objects\|HR objects
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