GD 1284

All names: BPS CS 29517-0035, UCAC4 370-190323, GALEX J235956.2-160915, GD 1284, EC 23573-1625, TIC 138707463, 2MASS J23595633-1609154, Gaia DR2 2415730473332601088, Gaia DR3 2415730473332601088, MCT2357-1625, MCT 2357-1625, PHL 611

Parameter Unit Geier 2020 Stilism Simbad
Right ascension 23 59 56.25 23 59 56.35 (0.03)
Declination -16 09 13.56 -16 09 15.56 (0.02)
Spectral type sdB sdBHe0
Effective temperature [K]
log(g) [cgs]
Mass [M☉]
log(Luminosity) [L☉]
Cooling age [Gyr]
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
Parallax [mas] 0.66 (0.06) 0.74 (0.04)
Distance [pc] 1526.48 (147) 1350.99 (66)
Composition
Proper motion (right ascension) [mas/yr] 22.063 (0.1) 22.144 (0.04)
Proper motion (declination) [mas/yr] -32.37 (0.07) -32.324 (0.03)
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.03 (0.02)
V magnitude 14.23 (0.03)
R magnitude 14.58 (0.1)
I magnitude
J magnitude 14.83 (0.04) 14.83 (0.04)
H magnitude 14.81 (0.07) 14.81 (0.07)
K magnitude 15.00 (0.1) 15.00 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 14.23 (0.0005) 14.21 (0.003)
BP magnitude 14.04 (0.005)
RP magnitude 14.47 (0.003)
Pan g magnitude 14.05 (0.0007)
Pan r magnitude 14.45 (0.002)
Pan i magnitude 14.81 (0.002)
Pan z magnitude 15.09 (0.005)
Pan y magnitude 15.26 (0.005)
E(B-V) 0.015

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour (Université de Montréal) and Dr. Simon Blouin (University of Victoria). Please send database updates, corrections, suggestions or bug reports to patrick.dufour@umontreal.ca.