| 释义 |
- Sun comparison
- References
{{Starbox begin
| name = HIP 100963
}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0 (ICRS)
| constell = Vulpecula
| ra = {{RA|20|28|11.81471}}
| dec = {{DEC|+22|07|44.3723}}
| appmag_v=+7.088[3]
}}{{Starbox character
| class = G5[4]
| b-v = +0.65[5]
| v-r = +0.39[5]
| r-i = +0.3[5]
}}{{Starbox astrometry
| radial_v = −1.6[8]
| prop_mo_ra = −23.90
| prop_mo_dec = −243.96
| parallax = 35.42
| p_error = 0.59
| parallax_footnote =
| absmag_v=
}}{{Starbox detail
| rotational_velocity = 2.39[12]
| mass = {{nowrap|0.998 ± 0.006}}[13]
| luminosity = {{nowrap|0.968 ± 0.043}}[13]
| age_gyr = 2.01–3.80[13]
| temperature = {{nowrap|5,779 ± 50}}[13]
| metal_fe = −0.002[13]
}}{{Starbox catalog
| names = BD+21 4221, HD 195034, LTT 15980, NLTT 49310, PPM 111203, SAO 88711.[5]
}}{{Starbox reference
| Simbad=HD+195034
}}{{Starbox end}}HIP 100963 is a G-type star in the faint northern constellation of Vulpecula[5] resembling the Sun. It has an apparent visual magnitude of approximately 7.1,[5] making it generally too faint to be seen with the naked eye in most circumstances. The distance to this star, as determined using parallax measurements from the Hipparcos mission, is around {{Convert|92|ly|pc|abbr=off|lk=on}}.This star has a stellar classification of G5,[5] making it a G-type star with an undetermined luminosity class. It has similar mass, temperature and chemical abundance to the Sun and was called a solar twin in a 2009 study, although its lithium abundance is three to four times that of the Sun and it is much younger. This lithium excess suggests that the star has a younger age of between 2.01 and 3.80 billion years, compared to the previous estimate of {{val|5.13|+0.00|-2.99|u=Gyr}} from a 2007 study.[13] Sun comparisonChart compares the sun to HIP 100963/HP 195034. − − Identifier − | J2000 Coordinates − | Distance
(ly) − | Stellar
Class − | Temperature
(K) − | Metallicity
(dex) − | Age
(Gyr) − | Notes − |
|---|
− Right ascension − | Declination − |
|---|
− {{CelestialRefAll|HD 195034}} − | 20|28|11.8}} − | +22|07|44}} − | 92 − | G5 − | 5,779 − | −0.002 − | 2.9 − − | − Sun − | — − | — − | 0.00 − | G2V − | 5,778 − | +0.00 − | 4.6 − − |
References1. ^1 2 3 4 5 6 7 {{cite simbad|title=HD 195034|accessdate=May 23, 2016}}
2. ^1 {{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}
3. ^1 {{citation | last1=White | first1=Russel J. | last2=Gabor | first2=Jared M. | last3=Hillenbrand | first3=Lynne A. | title=High-Dispersion Optical Spectra of Nearby Stars Younger Than the Sun | journal=The Astronomical Journal | volume=133 | issue=6 | pages=2524–2536 |date=June 2007 | doi=10.1086/514336 | bibcode=2007AJ....133.2524W |arxiv = 0706.0542 }}
4. ^1 {{Cite journal | display-authors=1 | last1=Nordström | first1=B. | last2=Mayor | first2=M. | last3=Andersen | first3=J. | last4=Holmberg | first4=J. | last5=Pont | first5=F. | last6=Jørgensen | first6=B. R. | last7=Olsen | first7=E. H. | last8=Udry | first8=S. | last9=Mowlavi | first9=N. | title=The Geneva-Copenhagen survey of the Solar neighbourhood. Ages, metallicities, and kinematic properties of ˜14 000 F and G dwarfs | journal=Astronomy and Astrophysics | volume=418 | pages=989–1019 |date=May 2004 | doi=10.1051/0004-6361:20035959 | bibcode=2004A&A...418..989N| issue=3 | arxiv=astro-ph/0405198 }}. See the Vizier entry for this star.
5. ^1 2 3 4 5 6 {{cite journal | display-authors=1 | last1=Do Nascimento | first1=J. D., Jr. | last2=Castro | first2=M. | last3=Meléndez | first3=J. | last4=Bazot | first4=M. | last5=Théado | first5=S. | last6=Porto de Mello | first6=G. F. | last7=de Medeiros | first7=J. R. | title=Age and mass of solar twins constrained by lithium abundance | journal=Astronomy and Astrophysics | volume=501 | issue=2 |date=July 2009 | pages=687–694 | doi=10.1051/0004-6361/200911935 | bibcode=2009A&A...501..687D |arxiv = 0904.3580 }}
6. ^1 {{citation | display-authors=1 | last1=Takeda | first1=Y. | last2=Honda | first2=S. | last3=Kawanomoto | first3=S. | last4=Ando | first4=H. | last5=Sakurai | first5=T. | title=Behavior of Li abundances in solar-analog stars. II. Evidence of the connection with rotation and stellar activity | journal=Astronomy and Astrophysics | volume=515 | page=A93 |date=June 2010 | doi=10.1051/0004-6361/200913897 | bibcode=2010A&A...515A..93T |arxiv = 1003.1564 }}
}}{{Stars of Vulpecula}} 5 : Vulpecula|G-type main-sequence stars|Hipparcos objects|Henry Draper Catalogue objects|Durchmusterung objects |