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Gliese 915

WD 2359-434
Gliese 915 and Earth.png
Size of WD 2359-434 in comparison with Earth. On the left is Earth, on the right is WD 2359-434.
Observation data
Epoch J2000      Equinox J2000
Constellation Phoenix
Right ascension 00h 02m 10.766s
Declination −43° 09′ 56.02″
Apparent magnitude (V) 12.76
Characteristics
Spectral type DAP5.8
Apparent magnitude (B) 13.12
Apparent magnitude (V) 12.76
Apparent magnitude (RKC) 12.82
Apparent magnitude (IKC) 12.66
Apparent magnitude (J) 12.60 ± 0.03
Apparent magnitude (H) 12.43 ± 0.02
Apparent magnitude (KS) 12.45 ± 0.02
Astrometry
Radial velocity (Rv) -58.8 ± 10.8 km/s
Proper motion (μ) RA: 589 mas/yr
Dec.: -664 mas/yr
Parallax (π) 122.27 ± 1.13mas
Distance 26.7 ± 0.2 ly
(8.18 ± 0.08 pc)
Absolute magnitude (MV) 13.20
Details
Mass 0.85 ± 0.01 M
Radius 0.0097 R
Surface gravity (log g) 8.39 ± 0.01 cgs
Temperature 8570 ± 50 K
Age 1.82 ± 0.06 Gyr
Other designations
Gliese 915,LHS 1005,LFT 1849,LTT 9857,LP 988-88,L 362-81, EGGR 165,2MASS J00021076-4309560
Database references
SIMBAD data

Coordinates: Sky map00h 02m 10.766s, −43° 09′ 56.02″

WD 2359-434 (Gliese 915, LHS 1005, L 362-81) is a nearby degenerate star (white dwarf) of spectral class DAP5.8, the single known component of the system, located in the constellation Phoenix, the nearest star in this constellation.

WD 2359-434, probably, is the 11th closest white dwarf, or, possibly, 9th, 10th, or 12th (see Gliese 293, GJ 1087 and Gliese 518). Currently, the most accurate distance estimate of WD 2359-434 is trigonometric parallax from CTIOPI (Cerro Tololo Inter-American Observatory Parallax Investigation) 0.9 m telescope program, published in 2009 in the 21st paper of RECONS's The Solar Neighborhood (TSN) series Subasavage et al. 2009: 122.27 ± 1.13 mas, corresponding to a distance 8.18 ± 0.08 pc, or 26.68 ± 0.25 ly.

The most accurate estimate is marked in bold.

WD 2359-434's mass is 0.85 ± 0.01 Solar masses, its surface gravity is 108.39 ± 0.01 (2.45 · 108) cm·s−2, or approximately 250,000 of Earth's, corresponding to a radius 6780 km, or 1.06 of Earth's.


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