astro.wikisort.org - StarHD 104304 (24 G. Virginis) is a binary star system in the zodiac constellation Virgo. It has a combined apparent visual magnitude of 5.54,[2] making it visible to the unaided eye under suitable viewing conditions. The system is located at a distance of 41 light-years from the Sun based on parallax measurements.[1] The primary component has a stellar classification of G8 IV,[3] which means that this is a subgiant star that has left the main sequence and has begun to evolve into a giant star. The secondary is a faint red dwarf star with a class of M4V.[4]
Star in the constellation Virgo with a planet
HD 104304
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Virgo |
Right ascension |
12h 00m 44.461s[1] |
Declination |
–10° 26′ 46.06″[1] |
Apparent magnitude (V) |
5.54[2] |
Characteristics |
Spectral type |
G8 IV[3] + M4V[4] |
U−B color index |
+0.43[2] |
B−V color index |
+0.76[2] |
Astrometry |
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|
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Radial velocity (Rv) | 0.14±0.14[1] km/s |
Proper motion (μ) | RA: 82.841 mas/yr[1] Dec.: −482.807 mas/yr[1] |
Parallax (π) | 78.7565 ± 0.1206 mas[1] |
Distance | 41.41 ± 0.06 ly (12.70 ± 0.02 pc) |
Absolute magnitude (MV) | 5.15±0.009[5] |
|
Orbit[4] |
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Period (P) | 48.5 yr |
Semi-major axis (a) | 10.4 AU |
Eccentricity (e) | 0.29 |
Inclination (i) | 35° |
Details |
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A |
---|
Mass | 0.98[6] M☉ |
Radius | 1.01[6] R☉ |
Surface gravity (log g) | 4.43[6] cgs |
Temperature | 5,538[3] K |
Metallicity [Fe/H] | 0.18[7] dex |
Rotational velocity (v sin i) | 4.5[8] km/s |
Age | 8.48[6] Gyr |
B |
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Mass | 0.21+0.03 −0.02[4] M☉ |
Other designations |
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BD−09°3413, GJ 454, HD 104304, HIP 58576, HR 4587, SAO 157041, G 24 G. Virginis, LTT 4476 [9] |
Database references |
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SIMBAD | data |
In 2007, a candidate planet was announced orbiting the primary. This was updated in 2010 when two independent papers announced the discovery of a common proper motion companion red dwarf.[4][10] It is believed to have a mass of 0.21 M☉ and spectral type of M4V although the spectrum has not been directly observed. The most likely orbit has a period of 48.5 years and an eccentricity of 0.29.[4][11] Further measurement will be needed to determine whether the star has a planetary companion, but further companions with masses above 83 MJ and separated by at least 3.9 au can be ruled out.[4]
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J
- Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770, Bibcode:2006AJ....132..161G, doi:10.1086/504637, S2CID 119476992
- Schnupp, C.; et al. (June 2010), "Discovery of a stellar companion to the nearby solar-analogue HD 104304", Astronomy and Astrophysics, 516: A21, arXiv:1005.0620, Bibcode:2010A&A...516A..21S, doi:10.1051/0004-6361/201014740, S2CID 54984741
- Park, Sunkyung; et al. (2013), "Wilson-Bappu Effect: Extended to Surface Gravity", The Astronomical Journal, 146 (4): 73, arXiv:1307.0592, Bibcode:2013AJ....146...73P, doi:10.1088/0004-6256/146/4/73, S2CID 119187733.
- Takeda, Genya; et al. (2007). "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog". The Astrophysical Journal Supplement Series. 168 (2): 297. arXiv:astro-ph/0607235. Bibcode:2007ApJS..168..297T. doi:10.1086/509763. S2CID 18775378.
- Hearnshaw, J. B. (1972), "The abundances of the elements in the oldest disk stars", Memoirs of the Royal Astronomical Society, 77: 55, Bibcode:1972MmRAS..77...55H
-
- "HD 104304". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-10-11.
- Tanner, Angelle M.; et al. (2010), "A High-Contrast Imaging Survey of SIM Lite Planet Search Targets", Publications of the Astronomical Society of the Pacific, 122 (896): 1195, arXiv:1007.4315, Bibcode:2010PASP..122.1195T, doi:10.1086/656481, S2CID 118459054.
- Schneider, Jean, "Star : HD 104304", Extrasolar Planets Encyclopaedia, CNRS/LUTH - Paris Observatory, retrieved 2011-12-21
Virgo constellation |
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Stars (list) | |
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Star clusters | |
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Nebulae | |
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Galaxies | Messier | |
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NGC | |
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Other |
- A1689-zD1
- Abell 1835 IR1916
- Arp 240 (NGC 5257 and NGC 5258)
- Arp 271 (NGC 5426 and NGC 5427)
- BR 1202-0725
- 3C 273
- 3C 279
- 3C 298
- 4C 04.42
- Eyes Galaxies
- GR 8
- IC 1011
- IC 1101
- IC 3258
- IC 3328
- IRAS 12212+0305
- IRAS 13197−1627
- M60-UCD1
- Markarian 50
- Markarian 1318
- PG 1216+069
- PG 1244+026
- PG 1254+047
- PG 1307+085
- PG 1416−129
- PG 1426+015
- PKS 1148-001
- PKS 1167+014
- PKS 1217+023
- PKS 1229−021
- PKS 1302−102
- PKS 1335−127
- PKS 1402+044
- PKS 1405−076
- QSO B1208+1011
- QSO B1243−072
- QSO B1246−057
- QSO B1331+170
- RXJ1242−11
- SMM J14011+0252
- UM 448
- UM 461
- UM 462
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Galaxy clusters | |
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Other |
- GRB 930131
- GRB 030328
- GRB 050408
- GRB 050801
- GRB 080310
- North Polar Spur
- SN 1960F
- SN 1981B
- SN 1990B
- SN 1990N
- SN 1991T
- SN 1991bg
- SN 1994D
- SN 1999br
- SN 2002cx
- SN 2007bi
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На других языках
- [en] HD 104304
[ru] HD 104304
HD 104304 (также у звезды есть обозначение данное Гулдом — 24 G. Девы[15]) — двойная звезда в зодиакальном созвездии Девы. Звезда имеет видимую звёздную величину +5.54m[2], и, согласно шкале Бортля, видна невооружённым глазом на засвеченном пригородном небе (англ. Bright suburban sky).
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