US 2187

All names: SDSS J090205.30+454915.1, USNO-B1.0 1358-00205856, SDSS J090205.29+454915.5, PSO J090205.297+454915.135, Gaia DR2 1010544614351271680, SDSS J090205.30+454915.10

Parameter Unit MWDD H Pan-STARRS DR1 Gaia DR2 Kepler et al. 2015 SDSS DR10 Simbad
Right ascension 09 02 05.30 (0.1) 09 02 05.30 09 02 05.30
Declination 45 49 14.96 (0.08) 45 49 15.54 45 49 15.54
Spectral type DAH: DAH: DA
Effective temperature [K] 10437.0 18625.0 (131)
log(g) [cgs] 7.96 8.80 (0.02)
Mass [M☉] 0.578
log(Luminosity) [L☉]
Cooling age [Gyr] 0.5118
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 7.78 (0.1)
Distance [pc] 128.59 (2)
Composition H
Proper motion (right ascension) [mas/yr] 2.2288910937 (0.2) 6.0
Proper motion (declination) [mas/yr] -40.9696038197 (0.2) -42.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.20
V magnitude
R magnitude 17.60
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 17.80 (0.04) 17.81 (0.01) 17.81
g magnitude 17.51 (0.03) 17.48 (0.005) 17.48
r magnitude 17.60 (0.01) 17.60 (0.006) 17.59
i magnitude 17.75 (0.04) 17.75 (0.007) 17.75
z magnitude 17.95 (0.04) 17.96 (0.02) 17.96
G magnitude 17.54
BP magnitude 17.55
RP magnitude 17.49
Pan g magnitude 17.50 (0.005)
Pan r magnitude 17.61 (0.004)
Pan i magnitude 17.78 (0.004)
Pan z magnitude 17.96 (0.004)
Pan y magnitude 18.08 (0.01)

* Constant surface field

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The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour at Université de Montréal. Please send database updates, corrections, suggestions or bug reports to dufourpa@astro.umontreal.ca.