HD 193556

Last updated
HD 193556
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Delphinus
Right ascension 20h 20m 20.5234s [1]
Declination +14° 34′ 09.3206″ [1]
Apparent magnitude  (V)6.17±0.01 [2]
Characteristics
Spectral type G8 III [3]
U−B color index +0.67 [4]
B−V color index +0.92 [4]
Astrometry
Radial velocity (Rv)11.7±0.3 [5]  km/s
Proper motion (μ)RA: −3.887  mas/yr [1]
Dec.: +5.610  mas/yr [1]
Parallax (π)6.9878 ± 0.0252  mas [1]
Distance 467 ± 2  ly
(143.1 ± 0.5  pc)
Absolute magnitude  (MV)+0.04 [6]
Details
Mass 2.65 [7]   M☉
Radius 11.33 [8]   R☉
Luminosity 102 [9]   L☉
Surface gravity (log g)2.76 [10]   cgs
Temperature 5,104 [10]   K
Metallicity [Fe/H]+0.03 [10]   dex
Rotational velocity (v sin i)1.5±1.2 [11]  km/s
Age 490 [7]   Myr
Other designations
AG+14°2187, BD+14°4263, FK5  3629, GC  28288, HD  193556, HIP  100274, HR  7778, SAO  105988 [12]
Database references
SIMBAD data

HD 193556 (HR 7778) is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.17, [2] making it visible to the naked eye under ideal conditions. Parallax measurements place the object at a distance of 467 light years [1] and it is currently receding with a heliocentric radial velocity of 11.7  km/s . [5]

HD 193556 has a stellar classification of G8 III, [3] indicating that it is a red giant. It has 2.65 times the mass of the Sun and is currently 490 million years old, [7] having expanded to 11.33 times the radius of the Sun. [8] It shines with a luminosity of 102  L☉ [9] from its enlarged photosphere at an effective temperature of 5,104  K , [10] giving it a yellow glow. HD 193556 has an iron abundance around solar level [10] and spins leisurely with a poorly constrained projected rotational velocity of 1.5  km/s . [11]

Related Research Articles

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HD 85725, also known as HR 3916, is a yellow hued star located in the southern constellation Antlia. It has an apparent magnitude of 6.29, placing it near the limit for naked eye visibility. The object is relatively close at a distance of 176 light-years, but is receding with a heliocentric radial velocity of 61.6 km/s.

HD 92589 is a double star in the constellation Antlia. The system has a combined apparent magnitude of 6.39, placing it near the limit of naked eye visibility. The system is located about 590 light years away based on its parallax shift and has a heliocentric radial velocity of 11 km/s. This indicates that it is drifting away from the Solar System.

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<span class="mw-page-title-main">CD-73°375</span> Binary star in the constellation Volans

CD-73°375 is a binary star located in the constellation Volans about 820 light years away. The two components, HR 2979 and HR 2980, are separated by two arc-seconds. The pair has a combined apparent magnitude of 6.34. It has a radial velocity of about 13 km/s, which means it drifting away from the Solar System.

<span class="mw-page-title-main">HD 27022</span> Star in the constellation Camelopardalis

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HD 64307, also known as HR 3075, is a solitary, orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.35, allowing it to be faintly seen with the naked eye. Based on parallax measurements from the Gaia spacecraft, The object is estimated to be 690 light years distant. It appears to be receding from the Sun, having a heliocentric radial velocity of 34 km/s.

HD 46588 is a star in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.44, allowing it to be faintly seen with the naked eye. The object is relatively close at a distance of only 59 light years but is receding with a heliocentric radial velocity of 15 km/s.

<span class="mw-page-title-main">12 Trianguli</span> Star in the constellation Triangulum

12 Trianguli is a solitary star located in the northern constellation Triangulum, with an apparent magnitude of 5.37, making it faintly visible to the naked eye under ideal conditions. The star is situated 160 light years away but is approaching with a heliocentric radial velocity of −24.8 km/s. It is calculated to be about 2.19 Gyr old with a stellar classification of F0 III, making it an F-type giant. It has 1.6 times the mass of the Sun and shines at 14 times the luminosity of the Sun from its photosphere at an effective temperature of 7,199 K.

HD 193472 is a solitary star in the equatorial constellation Delphinus. It has an apparent magnitude of 5.94, making it visible with the naked eye if viewed under ideal conditions. Parallax measurements put it at a distance of 282 light years and has a radial velocity of −8 km/s, indicating that the object drifting towards the Solar System.

HD 120213 is a solitary star in the southern circumpolar constellation Chamaeleon. It is faintly visible to the naked eye with an apparent magnitude of 5.94 and is estimated to be 910 light years away from the Solar System. However, the object is drifting closer with a heliocentric radial velocity of −35 km/s.

HD 72945 and HD 72946 form a co-moving star system in the northern constellation of Cancer. HD 72945 is a binary star that is dimly visible to the naked eye as a point of light with an apparent visual magnitude of 5.91. At an angular separation of 10.10″ is the fainter companion star HD 72946 at magnitude 7.25. It is being orbited by a brown dwarf. The system as a whole is located at a distance of approximately 84 light years from the Sun based on parallax measurements.

HD 222806 is a suspected astrometric binary in the southern circumpolar constellation Octans. It has an apparent magnitude of 5.74, allowing it to be faintly seen with the naked eye. Parallax measurements place the system at a distance of 565 light years and it is currently receding with a heliocentric radial velocity of 21 km/s.

HD 194012 is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.15, making it visible to the naked eye under ideal conditions. The star is relatively close at a distance of only 85 light years but is receding with a heliocentric radial velocity of 4.5 km/s.

HD 194953 is a solitary star in the equatorial constellation Delphinus. It is faintly visible to the naked eye with an apparent magnitude of 6.19 and is located 414 light years away. However, it is approaching the Solar System with a heliocentric radial velocity of −28 km/s.

HD 198404 is a star in the equatorial constellation Delphinus. It has an apparent magnitude of 6.19, allowing it to be faintly seen with the naked eye. Parallax measurements place the object at a distance of 395 light years and it is approaching the Solar System with a heliocentric radial velocity of −21.6 km/s.

HD 68375 is a solitary star in the northern circumpolar constellation Camelopardalis. It is faintly visible to the naked eye with an apparent magnitude of 5.54 and is estimated to be 289 light years distant. However, it is receding with a heliocentric radial velocity of 4.33 km/s.

<span class="mw-page-title-main">HD 22764</span> Double star; Camelopardalis

HD 22764, also known as HR 1112, is an orange hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.78, allowing it to be faintly visible to the naked eye. The object is located relatively far at a distance of approximately 1,770 light years based on Gaia DR3 parallax measurements but is approaching the Solar System with a heliocentric radial velocity of −12.5 km/s. At its current distance, HD 22764's brightness is diminished by 0.66 magnitudes due to interstellar dust.

<span class="mw-page-title-main">HD 117566</span> High proper motion star; Camelopardalis

HD 117566, also known as HR 5091, is a solitary yellow-hued star located in the northern circumpolar constellation Camelopardalis. It has an apparent magnitude of 5.74, making it faintly visible to the naked eye. This object is relatively close at a distance of 291 light years based on Gaia DR3 parallax measurements but is receding with a heliocentric radial velocity of 14 km/s. At its current distance, HD 117566's brightness is diminished by 0.12 magnitudes due to interstellar dust.

References

  1. 1 2 3 4 5 6 Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics . 649: A1. arXiv: 2012.01533 . Bibcode:2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657 . S2CID   227254300. (Erratum:  doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  2. 1 2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN   0004-6361.
  3. 1 2 Harlan, E. A. (September 1969). "MK classifications for F and G-type stars. I." The Astronomical Journal. 74: 916. Bibcode:1969AJ.....74..916H. doi: 10.1086/110881 . ISSN   0004-6256.
  4. 1 2 Fernie, J. D. (May 1983). "New UBVRI photometry for 900 supergiants". The Astrophysical Journal Supplement Series. 52: 7. Bibcode:1983ApJS...52....7F. doi: 10.1086/190856 . eISSN   1538-4365. ISSN   0067-0049.
  5. 1 2 Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053 . Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. ISSN   1063-7737. S2CID   119231169.
  6. ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN   1063-7737. S2CID   255204555.
  7. 1 2 3 Dotter, Aaron; Chaboyer, Brian; Jevremović, Darko; Kostov, Veselin; Baron, E.; Ferguson, Jason W. (September 2008). "The Dartmouth Stellar Evolution Database". The Astrophysical Journal Supplement Series. 178 (1): 89–101. arXiv: 0804.4473 . Bibcode:2008ApJS..178...89D. doi: 10.1086/589654 . eISSN   1538-4365. ISSN   0067-0049.
  8. 1 2 Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694 . Bibcode:2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467 . ISSN   0004-6256.
  9. 1 2 Luck, R. Earle (25 August 2015). "Abundances in the Local Region. I. G and K Giants". The Astronomical Journal. 150 (3): 88. arXiv: 1507.01466 . Bibcode:2015AJ....150...88L. doi:10.1088/0004-6256/150/3/88. eISSN   1538-3881. ISSN   0004-6256. S2CID   118505114.
  10. 1 2 3 4 5 Liu, Y. J.; Tan, K. F.; Wang, L.; Zhao, G.; Sato, Bun'ei; Takeda, Y.; Li, H. N. (31 March 2014). "The Lithium Abundances of a Large Sample of Red Giants". The Astrophysical Journal. 785 (2): 94. arXiv: 1404.1687 . Bibcode:2014ApJ...785...94L. doi: 10.1088/0004-637X/785/2/94 . eISSN   1538-4357. ISSN   0004-637X.
  11. 1 2 de Medeiros, J. R.; Mayor, M. (November 1999). "A catalog of rotational and radial velocities for evolved stars". Astronomy and Astrophysics Supplement Series. 139 (3): 433–460. Bibcode:1999A&AS..139..433D. doi: 10.1051/aas:1999401 . ISSN   0365-0138.
  12. ↑ "HD 193556". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved June 20, 2022.
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