EGGR 251

All names: SDSS J095017.10+531515.0, SDSS J095017.11+531514.8, SDSS J095017.10+531514.8, 2MASS J09501714+5315149, PLX 2323.01, GEN# +9.80195042, EGGR 251, PG 0946+535, WD 0946+534, TIC 453433386, SBSS 0946+534, 09502+5315, WD 0946+53, Gaia DR2 1020653077580086784, G 195-42, J0950+5315, NLTT 22699, USNO 526, Gaia DR3 1020653077580086784, GJ 3569, uvby98 980195042, PSO J147.5696+53.2539, G195-042, SBSS 0946+534B, WIRED J095017.10+531515.0, Gaia EDR3 1020653077580086784, PM J09502+5315, LSPM J0950+5315, SDSS J095017.10+531514.9, WDJ095017.14+531514.83, G195-42, USNO-B1.0 1432-00239281

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Coutu et al. 2019 Blouin et al. 2019 Gaia DR2 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Dufour et al. 2005 Bergeron et al. 2001 Bergeron et al. 1997 Wegner and Yackovich 1984 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 09 50 16.67 (0.02) 09 50 17.10 09 50 16.69 (0.03) 09 50 17.14 09 50 16.69 (0.03) 09 50 17.04 09 50 16.67 09 50 17.14 (0.02) 09 50 16.69 09 50 17.47 09 50 17.10
Declination 53 15 14.27 (0.02) 53 15 14.84 53 15 14.29 (0.03) 53 15 14.83 53 15 14.29 (0.03) 53 15 14.40 53 15 14.27 53 15 14.83 (0.02) 53 15 14.29 53 15 10.08 53 15 15.00
Spectral type DQ DQ DQ DQ DQ DQ DQ DC DQ6.2 DQ DQ DQ DQ DQ DQ6 DQ DQ6 DQ DQ
Effective temperature [K] 8053.0 (12) 8396.0 (72) 8092.0 (11) 8389.1 (41) 8031.0 (188) 8050.0 (35) 8166.0 (245) 8790.0 (253) 8100.0 8161.0 (245) 8100.0 (240) 8760.0 (290) 8780.0 (280) 7500.0 8078.0 (22) 10080.0 (2)
log(g) [cgs] 7.91 (0.003) 8.02 (0.02) 7.93 (0.003) 8.03 (0.01) 7.91 7.91 (0.01) 8.06 (0.1) 8.43 (0.1) 8.26 (0.1) 8.27 (0.1) 8.45 (0.1) 8.46 (0.1) 7.91 (0.005) 8.77 (0.3)
Mass [M] 0.522 (0.002) 0.588 (0.01) 0.536 (0.003) 0.5229 0.525 (0.006) 0.74 (0.08) 0.86 (0.07) 0.74 (0.08) 0.75 (0.08) 0.87 (0.07) 0.88 (0.07) 0.525 (0.004)
log(Luminosity) [L] -3.33 -3.35 -3.35 (0.07) -3.35 (0.07)
Cooling age [Gyr] 1.0300 0.9780 0.9780 (0.02) 1.5900 1.5900 1.9700 (0.4) 2.3400 (0.5) 0.7400
log(H/He) <-3
log(C/He) -5.51 -5.55 -5.6228 (0.04) -5.51 -5.35 -5.33 (0.4) -5.4
log(Ca/He)
log(Ca/H)
log(N/He) <-8
log(O/He) <-8
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 36.23 (0.03) 36.23 (0.03) 36.31 (0.05) 36.31 (0.05) 36.31 36.31 (0.05) 36.31 (0.05) 43.50 (4) 43.50 (4) 43.50 (4) 43.50 (4) 43.50 (4) 36.23 36.23 (0.03) 36.31 (0.05) 44.20 (36)
Distance [pc] 27.60 (0.02) 27.60 (0.02) 27.54 (0.04) 27.54 (0.04) 27.54 (0.04) 27.54 (0.04) 27.54 (0.04) 22.99 (2) 23.00 (2) 22.98 23.00 (2) 22.99 (2) 22.99 (2) 27.60 27.60 (0.02) 27.54 (0.04) 22.62 (18)
Composition He He He He He He He He He He He
Proper motion (right ascension) [mas/yr] -262.2505572 (0.02) -262.2808232 (0.06) -262.251 (0.02) -262.281
Proper motion (declination) [mas/yr] -35.16573388 (0.02) -34.96934326 (0.1) -35.166 (0.02) -34.969
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.35 15.35 15.35 15.30
V magnitude 15.30 15.18 15.18 15.18
R magnitude 15.05 15.05 15.05 15.10
I magnitude 14.90 14.90 14.90
J magnitude 14.94 (0.005) 14.91 (0.05) 14.90 14.90 14.90 14.91 (0.05)
H magnitude 14.89 (0.07) 14.89 (0.07) 14.87 14.87 14.87 14.89 (0.07)
K magnitude 14.92 (0.1) 14.92 (0.1) 14.88 14.88 14.88 14.92 (0.1)
u magnitude 15.44 (0.004) 15.44 (0.004) 15.44 (0.004) 15.44 (0.004) 15.45 (0.02)
g magnitude 15.15 (0.003) 15.18 (0.0007) 15.14 (0.003) 15.15 (0.03)
r magnitude 15.14 (0.003) 15.18 (0.003) 15.17 (0.003) 15.18 (0.03)
i magnitude 15.25 (0.003) 15.27 (0.003) 15.25 (0.004) 15.25 (0.02)
z magnitude 15.38 (0.005) 15.40 (0.002) 15.41 (0.005) 15.41 (0.02)
G magnitude 15.11 (0.001) 15.13 15.13 15.11 15.11 (0.003) 15.13
BP magnitude 15.19 (0.001) 15.18 15.18
RP magnitude 14.94 (0.002) 14.95 14.95
Pan g magnitude 15.18 (0.0007) 15.18 (0.0007) 15.18 (0.001)
Pan r magnitude 15.18 (0.003) 15.18 (0.003) 15.18 (0.003)
Pan i magnitude 15.27 (0.002) 15.27 (0.003) 15.27 (0.003)
Pan z magnitude 15.40 (0.002) 15.40 (0.002) 15.40 (0.002)
Pan y magnitude 15.48 (0.004) 15.48 (0.005) 15.48 (0.005)
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.