GD 185

All names: USNO-B1.0 0875-00379021, WD 1531-02, GEN# +6.10060185, WDJ153406.00-022708.26, Gaia EDR3 4403768373911022080, J1534-0227, PG 1531-023, BPS CS 30312-0069, GALEX J153406.1-022708, [TFW97] J153406.12-022706.30, WD 1531-022, EGGR 192, Gaia DR3 4403768373911022080, uvby98 610060185, BPM 77964, TIC 20996793, 2MASS J15340600-0227082, SDSS J153405.99-022708.4, GD 185, Gaia DR2 4403768373911022080

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Hardy et al. 2023a Kilic et al. 2020 MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Koester et al. 2014 Gianninas et al. 2011 Koester et al. 2009 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 15 34 05.93 (0.06) 15 34 05.93 (0.08) 15 34 05.93 15 34 06.00 (0.06) 15 34 05.93 15 34 06.00
Declination -02 27 10.32 (0.06) -02 27 10.25 (0.1) -02 27 10.32 -02 27 08.26 (0.06) -02 27 10.25 -02 27 12.24
Spectral type DA DA DA DA DA DA DA DA2.6 DA2.5
Effective temperature [K] 18840.0 (160) 18730.7 (82) 18839.0 (161) 16603.0 18620.0 (285) 19472.0 (264) 19540.0 (299) 19234.0 (18) 19139.0 (208)
log(g) [cgs] 8.00 (0.007) 7.99 (0.02) 8.00 (0.008) 7.86 8.46 (0.09) 8.46 (0.05) 8.35 (0.004) 8.00 (0.009)
Mass [M] 0.619 (0.006) 0.6144282517718074 (0.03) 0.622 (0.007) 0.542 0.88 (0.03) 0.898 (0.06) 0.91 (0.03) 0.623 (0.008)
log(Luminosity) [L]
Cooling age [Gyr] 0.1102
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) <-8.40
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] 24.00 (0.07) 24.11 (0.1) 24.00 24.00 (0.07) 24.11 (0.1)
Distance [pc] 41.67 (0.1) 41.47 (0.2) 31.00 41.67 41.67 (0.1) 41.47 (0.2)
Composition H H H
Proper motion (right ascension) [mas/yr] -64.4304785 (0.07) -64.5557988 (0.2) -64.43 (0.07) -64.5557988
Proper motion (declination) [mas/yr] -128.7368958 (0.06) -128.6794086 (0.2) -128.737 (0.06) -128.6794086
Variability
Magnetic yes
Bd [MG] 0.035 * (0.02)
Infrared excess (disk)
Binarity
B magnitude 14.03
V magnitude 13.97 (0.03) 14.03 14.03
R magnitude 13.90
I magnitude
J magnitude 14.39 (0.04)
H magnitude 14.48 (0.05)
K magnitude 14.62 (0.1)
u magnitude 13.88 (0.003) 13.88 (0.003)
g magnitude 13.80 (0.003) 13.80 (0.003)
r magnitude 14.14 (0.004) 14.14 (0.004)
i magnitude 14.43 (0.004) 14.43 (0.004)
z magnitude 14.73 (0.005) 14.73 (0.005)
G magnitude 13.99 (0.001) 14.00 13.99 13.99 (0.003) 14.00
BP magnitude 13.91 (0.001) 13.88 13.88
RP magnitude 14.14 (0.001) 14.15 14.15
Pan g magnitude 13.88 (0.001)
Pan r magnitude 14.17 (0.002)
Pan i magnitude 14.46 (0.003)
Pan z magnitude 14.73 (0.003)
Pan y magnitude 14.90 (0.003)
E(B-V) 0.001

* 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.