Ross 248

Ross 248
Data pengamatan
Epos J2000      Ekuinoks J2000
Rasi bintang Andromeda
Asensio rekta  23j 41m 54.99d[1]
Deklinasi  +44° 10′ 40.8″[1]
Magnitudo tampak (V) 12.29[2]
Ciri-ciri
Kelas spektrum M6e[3]
Indeks warna U−B +1.48[2]
Indeks warna B−V +1.92[2]
Jenis variabel Flare star
Astrometri
Kecepatan radial (Rv)-81[4] km/s
Gerak diri (μ) RA: 111[5] mdb/thn
Dek.: -1584[5] mdb/thn
Paralaks (π)316,80±1,10[6] mdb
Jarak10,30 ± 0,04 tc
(3,16 ± 0,01 pc)
Magnitudo mutlak (MV)14.79[7]
Detail
Massa0.12[8] M☉
Radius0.16[9] R☉
Luminositas0.0018[10] L☉
Gravitasi permukaan (log g)5.12[3]
Suhu2,799[3] K
Rotasiv sin i < 3 km/s[11]
Penamaan lain
HH Andromedae, HH And, GCTP 5736.00, GJ 905, Gl 171-010, LHS 549, 2MASS J23415498+4410407.[2]

Ross 248 (HH Andromedae) adalah bintang katai merah yang terletak sejauh 10,3 tahun cahaya dari Bumi. Bintang ini berada di rasi bintang Andromeda.

Bintang ini memunyai 12% massa matahari, 16% jari-jari matahari, dan 0,2% luminositas matahari. Ross 248 merupakan bintang suar yang kadang-kadang luminositasnya meningkat.[12]

Referensi

  1. ^ a b Cutri, R. M.; et al. (2003). 2MASS All Sky Catalog of point sources. NASA/IPAC. Bibcode:2003tmc..book.....C. ;
  2. ^ a b c d "V* HH And – Flare Star". SIMBADa. Centre de Données astronomiques de Strasbourg. Diakses tanggal 2009-09-06.
  3. ^ a b c Cenarro, A. J.; Peletier, R. F.; Sánchez–blázquez, P.; Selam, S. O.; Toloba, E.; Cardiel, N.; Falcón–barroso, J.; Gorgas, J.; Jiménez-Vicente, J. (2007). "Medium-resolution Isaac Newton Telescope Library of Empirical Spectra – II. The Stellar Atmospheric Parameters". Monthly Notices of the Royal Astronomical Society. 374 (2): 664–690. doi:10.1111/j.1365-2966.2006.11196.x.
  4. ^ Wilson, Ralph Elmer (1953). General Catalogue of Stellar Radial Velocities. Washington: Carnegie Institution of Washington. Bibcode:1953QB901.W495.....
  5. ^ a b Lépine, Sébastien; Shara, Michael M (2005). "A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog)". The Astronomical Journal. 129 (3): 1483–1522. doi:10.1086/427854. Pemeliharaan CS1: Banyak nama: authors list (link)
  6. ^ Leggett, S. K. (1992). "Infrared colors of low-mass stars". Astrophysical Journal Supplement Series. 82 (1): 351–394. doi:10.1086/191720.
  7. ^ Schroeder, Daniel J.; Golimowski, David A.; Brukardt, Ryan A.; Burrows, Christopher J.; Caldwell, John J.; Fastie, William G.; Ford, Holland C.; Hesman, Brigette; Kletskin, Ilona (2000). "A Search for Faint Companions to Nearby Stars Using the Wide Field Planetary Camera 2". The Astronomical Journal. 119: 906–922. doi:10.1086/301227.
  8. ^ "The One Hundred Nearest Star Systems". Research Consortium on Nearby Stars. 2009-01-01. Diakses tanggal 2009-09-06.
  9. ^ Johnson, H. M.; Wright, C. D. (1983). "Predicted infrared brightness of stars within 25 parsecs of the Sun". Astrophysical Journal Supplement Series. 53: 643–711. doi:10.1086/190905. Pemeliharaan CS1: Banyak nama: authors list (link) See p. 705.
  10. ^ West, Frederick R. (1999). "Monitoring Nearby Stars for Transits by Extrasolar Jovial Planets, II: Transits of M-Type (Red) Dwarf Stars by Close Extrasolar Giant (Jovian) Planets". The Journal of the American Association of Variable Star Observers. 27 (1): 77–78. Bibcode:1999JAVSO..27...77W.
  11. ^ Reiners, A.; Basri, G. (2007). "The First Direct Measurements of Surface Magnetic Fields on Very Low Mass Stars". The Astrophysical Journal. 656 (2): 1121–1135. doi:10.1086/510304. Pemeliharaan CS1: Banyak nama: authors list (link)
  12. ^ Poveda, Arcadio; Allen, Christine; Herrera, Miguel Angel (1996). "Chromospheric Activity, Stellar Winds and Red Stragglers". Workshop on Colliding Winds in Binary Stars to Honor Jorge Sahade. Vol. 5. Universidad Nacional Autonoma de Mexico. hlm. 16–20. Pemeliharaan CS1: Banyak nama: authors list (link)

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