G 99-47

Coordinates: Sky map 05h 56m 25.47s, +05° 21′ 48.6″
Source: Wikipedia, the free encyclopedia.
G 99-47

A visual band light curve for V1201 Orionis, adapted from Brinkworth et al. (2013)[1]
Observation data
J2000[2]
Constellation Orion
Right ascension 05h 56m 25.47s[2]
Declination +05° 21′ 48.6″[2]
Apparent magnitude (V) 14.105[3]
Characteristics
Spectral type DAP8.9[4]
Apparent magnitude (B) 14.69[2]
Apparent magnitude (V) 14.10[2]
Apparent magnitude (R) 14.0[2]
Apparent magnitude (I) 13.6[2]
Apparent magnitude (J) 12.930 ± 0.022[2]
Apparent magnitude (H) 12.720 ± 0.025[2]
Apparent magnitude (K) 12.653 ± 0.024[2]
Distance
26.474 ± 0.004 ly
(8.117 ± 0.001 pc)
Absolute magnitude (MV)14.59[3][6][note 1]
Details
Gyr
2MASS J05562547+0521486,[2] USNO-B1.0 0953-00073703, Gaia DR2 3320184202856027776[2]
Database references
SIMBADdata

G 99-47 (V1201 Orionis) is a nearby degenerate star (

Gliese 915
.

The mass of G 99-47 is 0.71±0.03

Gyr.[4] Due almost equal to the Sun's temperature, GJ 1087 should appear almost the same white color as the Sun. The white dwarf has a strong magnetic field, with measured vertical component near surface equal to 560 T.[7]

See also

Notes

  1. ^ From apparent magnitude and parallax.
  2. ^ From surface gravity and mass.
  3. ^ White dwarf cooling age, i. e. age as degenerate star (not including lifetime as main sequence star and as giant star)

References

  1. S2CID 56285149
    .
  2. ^
    Centre de Données astronomiques de Strasbourg
    . Retrieved 2011-11-01.
  3. ^ a b c d e f g h i j k l Holberg, J. B.; Sion; Oswalt; McCook; Foran; Subasavage (2008). "A New Look at the Local White Dwarf Population".
    S2CID 122855486
    .
  4. ^ a b c d e Sion, Edward M.; Holberg; Oswalt; McCook; Wasatonic (2009). "The White Dwarfs within 20 Parsecs of the Sun: Kinematics and Statistics".
    S2CID 119284418
    .
  5. ^
    doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  6. ^ a b Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
  7. S2CID 222290583
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