fbpx
Wikipedia

HD 4222

April 12, 2024

HD 4222, also known as HR 196, is the primary of a binary star[17] located in the northern constellation Cassiopeia. It is faintly visible to the naked eye as a white-hued point of light with an apparent magnitude of 5.41.[2] Gaia DR3 parallax measurements imply a distance of 353 light-years and it is drifting closer with a heliocentric radial velocity of −8.5 km/s.[10] At its current distance, HD 4222's brightness is diminished by an interstellar extinction of 0.13 magnitudes and it has an absolute magnitude of +0.44.[11]

HD 4222
Location of HD 4222 on the map (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Cassiopeia
A
Right ascension 00h 45m 17.17365s[1]
Declination +55° 13′ 17.0310″[1]
Apparent magnitude (V) 5.41±0.01[2]
B
Right ascension 00h 45m 17.14092s[3]
Declination +55° 13′ 15.4000″[3]
Apparent magnitude (V) 11.5[4]
Characteristics
A
Evolutionary stage main sequence star[5]
Spectral type A2 Vs[6] or A1 V[7]
U−B color index +0.05[8]
B−V color index +0.04[8]
B
Spectral type M2-5V[9]
Astrometry
Radial velocity (Rv)−8.5±2[10] km/s
Proper motion (μ) RA: −29.935 mas/yr[1]
Dec.: −5.616 mas/yr[1]
Parallax (π)9.2342 ± 0.0586 mas[1]
Distance353 ± 2 ly
(108.3 ± 0.7 pc)
Absolute magnitude (MV)+0.44[11]
Details
A
Mass2.59±0.04[5] M☉
Radius3.47±0.18[12] R☉
Luminosity69.1+5.6
−5.2[5] L☉
Surface gravity (log g)3.72+0.08
−0.06[13] cgs
Temperature9,886[14] K
Metallicity [Fe/H]−0.26[15] dex
Rotational velocity (v sin i)25±8[7] km/s
Age407+51
−52[1] Myr
Other designations
AG+54°69, BD+54°143, GC 894, HD 4222, HIP 3544, HR 196, SAO 21677, ADS 625 A, CCDM J00453+5514A, WDS J00453+5513A, TIC 445136120[16]
Database references
SIMBADdata

HD 4222 has a stellar classification of A2 Vs or A1 V,[6][7] both classes indicating that it is an A-type main-sequence star that is generating energy via hydrogen fusion at its core. The former class includes the presence of 'sharp' or narrow absorption lines due to slow rotation. Consistent with the class, HD 4222 spins modestly with a projected rotational velocity of approximately 25 km/s.[7] It has 2.59 times the mass of the Sun[5] and 3.47 times the radius of the Sun.[12] It radiates 69.1 times the luminosity of the Sun[5] from its photosphere with an effective temperature of 9,886 K.[14] HD 4222 is metal deficient with an iron abundance of [Fe/H] = −0.26 or 55% of the Sun's.[15] At the age of 407 million years,[1] HD 4222 has completed 81.5% of its main sequence lifetime.[5]

HD 4222 and BU 492B make up the binary system BU 492. The companion is a red dwarf with a stellar classification of M2-5V; it is located 1.5" away from the primary along a position angle of 173°. BU 492B was first noticed by astronomer S. W. Burnham in 1878. HD 4222 also has one optical companion; an 11th magnitude star located 88.6" away, which itself is also a double star.[4] A X-ray emission with a luminosity of 3.031×1020 W was detected around the star.[9] A-type stars are not expected to emit X-rays, so it might be coming from the companion. HD 4222 is considered to be a probable member of the Sirius supercluster, a group of stars moving with the bright star Sirius and share a common origin with the system.[18]

References edit

  1. ^ a b c d e f Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b 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. S2CID 17128864.
  3. ^ a b Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  4. ^ a b Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256. S2CID 119533755.
  5. ^ a b c d e f Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars IV: Evolution of rotational velocities". Astronomy & Astrophysics. 537: A120. arXiv:1201.2052. Bibcode:2012A&A...537A.120Z. doi:10.1051/0004-6361/201117691. eISSN 1432-0746. ISSN 0004-6361. S2CID 55586789.
  6. ^ a b Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal. 74: 375. Bibcode:1969AJ.....74..375C. doi:10.1086/110819. ISSN 0004-6256. S2CID 121555804.
  7. ^ a b c d Abt, Helmut A.; Morrell, Nidia I. (July 1995). "The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars". The Astrophysical Journal Supplement Series. 99: 135. Bibcode:1995ApJS...99..135A. doi:10.1086/192182. ISSN 0067-0049. S2CID 120495962.
  8. ^ a b Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
  9. ^ a b Schröder, C.; Schmitt, J. H. M. M. (24 September 2007). "X-ray emission from A-type stars". Astronomy & Astrophysics. 475 (2): 677–684. Bibcode:2007A&A...475..677S. doi:10.1051/0004-6361:20077429. eISSN 1432-0746. ISSN 0004-6361.
  10. ^ a b Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Carnegie Institute Washington D.C. Publication: 0. Bibcode:1953GCRV..C......0W. S2CID 120000732.
  11. ^ a b 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. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
  12. ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (April 8, 2004). "The angular sizes of dwarf stars and subgiants: Surface brightness relations calibrated by interferometry". Astronomy & Astrophysics. 426 (1): 297–307. arXiv:astro-ph/0404180. Bibcode:2004A&A...426..297K. doi:10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361. S2CID 6077801.
  13. ^ 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. eISSN 1538-3881. hdl:1721.1/124721. S2CID 166227927.
  14. ^ a b Fracassini, M.; Manzolini, F.; Pasinetti, L. E.; Ruggenini, M. (May 1980). "Apparent radii and other parameters for 416 B5 V-F5 V stars of the catalogue of the Geneva observatory". Astrophysics and Space Science. 69 (2). Springer Science and Business Media LLC: 401–423. Bibcode:1980Ap&SS..69..401F. doi:10.1007/bf00661927. ISSN 0004-640X. S2CID 189849072.
  15. ^ a b Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. eISSN 1432-0746. ISSN 0004-6361. S2CID 131780028.
  16. ^ "HD 4222". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved November 8, 2023.
  17. ^ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. eISSN 1365-2966. ISSN 0035-8711. S2CID 14878976.
  18. ^ Eggen, O. J. (June 1, 1960). "Stellar Groups, VIII. The Structure of the Sirius Group". Monthly Notices of the Royal Astronomical Society. 120 (6). Oxford University Press (OUP): 563–580. Bibcode:1960MNRAS.120..563E. doi:10.1093/mnras/120.6.563. ISSN 0035-8711. S2CID 119805328.

April 12, 2024
4222, also, known, primary, binary, star, located, northern, constellation, cassiopeia, faintly, visible, naked, white, hued, point, light, with, apparent, magnitude, gaia, parallax, measurements, imply, distance, light, years, drifting, closer, with, heliocen. HD 4222 also known as HR 196 is the primary of a binary star 17 located in the northern constellation Cassiopeia It is faintly visible to the naked eye as a white hued point of light with an apparent magnitude of 5 41 2 Gaia DR3 parallax measurements imply a distance of 353 light years and it is drifting closer with a heliocentric radial velocity of 8 5 km s 10 At its current distance HD 4222 s brightness is diminished by an interstellar extinction of 0 13 magnitudes and it has an absolute magnitude of 0 44 11 HD 4222Location of HD 4222 on the map circled Observation dataEpoch J2000 0 Equinox J2000 0 ICRS Constellation CassiopeiaARight ascension 00h 45m 17 17365s 1 Declination 55 13 17 0310 1 Apparent magnitude V 5 41 0 01 2 BRight ascension 00h 45m 17 14092s 3 Declination 55 13 15 4000 3 Apparent magnitude V 11 5 4 CharacteristicsAEvolutionary stage main sequence star 5 Spectral type A2 Vs 6 or A1 V 7 U B color index 0 05 8 B V color index 0 04 8 BSpectral type M2 5V 9 AstrometryRadial velocity Rv 8 5 2 10 km sProper motion m RA 29 935 mas yr 1 Dec 5 616 mas yr 1 Parallax p 9 2342 0 0586 mas 1 Distance353 2 ly 108 3 0 7 pc Absolute magnitude MV 0 44 11 DetailsAMass2 59 0 04 5 M Radius3 47 0 18 12 R Luminosity69 1 5 6 5 2 5 L Surface gravity log g 3 72 0 08 0 06 13 cgsTemperature9 886 14 KMetallicity Fe H 0 26 15 dexRotational velocity v sin i 25 8 7 km sAge407 51 52 1 MyrOther designationsAG 54 69 BD 54 143 GC 894 HD 4222 HIP 3544 HR 196 SAO 21677 ADS 625 A CCDM J00453 5514A WDS J00453 5513A TIC 445136120 16 Database referencesSIMBADdataHD 4222 has a stellar classification of A2 Vs or A1 V 6 7 both classes indicating that it is an A type main sequence star that is generating energy via hydrogen fusion at its core The former class includes the presence of sharp or narrow absorption lines due to slow rotation Consistent with the class HD 4222 spins modestly with a projected rotational velocity of approximately 25 km s 7 It has 2 59 times the mass of the Sun 5 and 3 47 times the radius of the Sun 12 It radiates 69 1 times the luminosity of the Sun 5 from its photosphere with an effective temperature of 9 886 K 14 HD 4222 is metal deficient with an iron abundance of Fe H 0 26 or 55 of the Sun s 15 At the age of 407 million years 1 HD 4222 has completed 81 5 of its main sequence lifetime 5 HD 4222 and BU 492B make up the binary system BU 492 The companion is a red dwarf with a stellar classification of M2 5V it is located 1 5 away from the primary along a position angle of 173 BU 492B was first noticed by astronomer S W Burnham in 1878 HD 4222 also has one optical companion an 11th magnitude star located 88 6 away which itself is also a double star 4 A X ray emission with a luminosity of 3 031 1020 W was detected around the star 9 A type stars are not expected to emit X rays so it might be coming from the companion HD 4222 is considered to be a probable member of the Sirius supercluster a group of stars moving with the bright star Sirius and share a common origin with the system 18 References edit a b c d e f Vallenari A et al Gaia collaboration 2023 Gaia Data Release 3 Summary of the content and survey properties Astronomy and Astrophysics 674 A1 arXiv 2208 00211 Bibcode 2023A amp A 674A 1G doi 10 1051 0004 6361 202243940 S2CID 244398875 Gaia DR3 record for this source at VizieR a b Hog 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 amp A 355L 27H ISSN 0004 6361 S2CID 17128864 a b Vallenari A et al Gaia collaboration 2023 Gaia Data Release 3 Summary of the content and survey properties Astronomy and Astrophysics 674 A1 arXiv 2208 00211 Bibcode 2023A amp A 674A 1G doi 10 1051 0004 6361 202243940 S2CID 244398875 Gaia DR3 record for this source at VizieR a b Mason Brian D Wycoff Gary L Hartkopf William I Douglass Geoffrey G Worley Charles E December 2001 The 2001 US Naval Observatory Double Star CD ROM I The Washington Double Star Catalog The Astronomical Journal 122 6 3466 3471 Bibcode 2001AJ 122 3466M doi 10 1086 323920 ISSN 0004 6256 S2CID 119533755 a b c d e f Zorec J Royer F January 2012 Rotational velocities of A type stars IV Evolution of rotational velocities Astronomy amp Astrophysics 537 A120 arXiv 1201 2052 Bibcode 2012A amp A 537A 120Z doi 10 1051 0004 6361 201117691 eISSN 1432 0746 ISSN 0004 6361 S2CID 55586789 a b Cowley A Cowley C Jaschek M Jaschek C April 1969 A study of the bright stars I A catalogue of spectral classifications The Astronomical Journal 74 375 Bibcode 1969AJ 74 375C doi 10 1086 110819 ISSN 0004 6256 S2CID 121555804 a b c d Abt Helmut A Morrell Nidia I July 1995 The Relation between Rotational Velocities and Spectral Peculiarities among A Type Stars The Astrophysical Journal Supplement Series 99 135 Bibcode 1995ApJS 99 135A doi 10 1086 192182 ISSN 0067 0049 S2CID 120495962 a b Mermilliod J C 1986 Compilation of Eggen s UBV data transformed to UBV unpublished Catalogue of Eggen s UBV Data SIMBAD Bibcode 1986EgUBV 0M a b Schroder C Schmitt J H M M 24 September 2007 X ray emission from A type stars Astronomy amp Astrophysics 475 2 677 684 Bibcode 2007A amp A 475 677S doi 10 1051 0004 6361 20077429 eISSN 1432 0746 ISSN 0004 6361 a b Wilson Ralph Elmer 1953 General catalogue of stellar radial velocities Carnegie Institute Washington D C Publication 0 Bibcode 1953GCRV C 0W S2CID 120000732 a b 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 eISSN 1562 6873 ISSN 1063 7737 S2CID 119257644 a b Kervella P Thevenin F Di Folco E Segransan D April 8 2004 The angular sizes of dwarf stars and subgiants Surface brightness relations calibrated by interferometry Astronomy amp Astrophysics 426 1 297 307 arXiv astro ph 0404180 Bibcode 2004A amp A 426 297K doi 10 1051 0004 6361 20035930 eISSN 1432 0746 ISSN 0004 6361 S2CID 6077801 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 eISSN 1538 3881 hdl 1721 1 124721 S2CID 166227927 a b Fracassini M Manzolini F Pasinetti L E Ruggenini M May 1980 Apparent radii and other parameters for 416 B5 V F5 V stars of the catalogue of the Geneva observatory Astrophysics and Space Science 69 2 Springer Science and Business Media LLC 401 423 Bibcode 1980Ap amp SS 69 401F doi 10 1007 bf00661927 ISSN 0004 640X S2CID 189849072 a b Anders F et al August 2019 Photo astrometric distances extinctions and astrophysical parameters for Gaia DR2 stars brighter than G 18 Astronomy amp Astrophysics 628 A94 arXiv 1904 11302 Bibcode 2019A amp A 628A 94A doi 10 1051 0004 6361 201935765 eISSN 1432 0746 ISSN 0004 6361 S2CID 131780028 HD 4222 SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved November 8 2023 Eggleton P P Tokovinin A A 11 September 2008 A catalogue of multiplicity among bright stellar systems Monthly Notices of the Royal Astronomical Society 389 2 869 879 arXiv 0806 2878 Bibcode 2008MNRAS 389 869E doi 10 1111 j 1365 2966 2008 13596 x eISSN 1365 2966 ISSN 0035 8711 S2CID 14878976 Eggen O J June 1 1960 Stellar Groups VIII The Structure of the Sirius Group Monthly Notices of the Royal Astronomical Society 120 6 Oxford University Press OUP 563 580 Bibcode 1960MNRAS 120 563E doi 10 1093 mnras 120 6 563 ISSN 0035 8711 S2CID 119805328 Retrieved from https en wikipedia org w index php title HD 4222 amp oldid 1199080893, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.