SDSS J095934.77+255618.8

All names: SDSS J095934.77+255618.75, SDSS J095934.77+255618.8, SDSS J095934.77+255618.7, J0959+2556, USNO-A2.0 1125-06022873, WDJ095934.77+255618.58, Gaia DR3 643650361688870656, Gaia EDR3 643650361688870656, 2MASS J09593472+2556187, Gaia DR2 643650361688870656, TIC 308015797

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 Coutu et al. 2019 Gaia DR2 Stilism Kepler et al. 2016 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Vincent et al. 2023
Right ascension 09 59 34.77 (0.06) 09 59 34.77 09 59 34.77 09 59 34.77 (0.1) 09 59 34.77 09 59 34.77 (0.06) 09 59 34.77
Declination 25 56 19.38 (0.06) 25 56 18.81 25 56 18.58 25 56 19.36 (0.1) 25 56 19.38 25 56 18.58 (0.06) 25 56 19.36
Spectral type DZ DZ DZ DZ DZ DC DZ
Effective temperature [K] 8936.0 (60) 8826.0 (41) 9304.0 (284) 7505.0 (100) 8378.0 (86)
log(g) [cgs] 8.07 (0.01) 8.01 (0.01) 8.17 8.00 (0) 7.94 (0.02)
Mass [M] 0.622 (0.009) 0.585 (0.01) 0.6849 0.54 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 0.9200 0.9710
log(H/He) -5.0 -4.0 <-5.6583
log(C/He)
log(Ca/He) -10.99 -10.92 -10.8094 (0.04) -10.5
log(Ca/H)
log(N/He)
log(O/He)
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] 17.61 (0.07) 17.51 (0.2) 17.51 17.51 (0.2) 17.61 17.61 (0.07) 17.51 (0.2)
Distance [pc] 56.78 (0.2) 57.11 (0.5) 57.12 (0.5) 57.12 (0.5) 56.78 56.77 (0.2) 57.12 (0.5)
Composition He He He
Proper motion (right ascension) [mas/yr] -4.007193377 (0.08) -3.866304465 (0.2) -4.007 (0.08) -3.866304465
Proper motion (declination) [mas/yr] 50.11014119 (0.08) 50.11233863 (0.2) 50.11 (0.08) 50.11233863
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.20 (0.3)
V magnitude
R magnitude 16.20 (0.3)
I magnitude
J magnitude 16.43 (0.01) 16.11 (0.09)
H magnitude 16.30 (0.2) 16.30 (0.2)
K magnitude
u magnitude 16.76 (0.007) 16.75 (0.007) 16.76 (0.01) 16.77 (0.007) 16.77 (0.007)
g magnitude 16.54 (0.004) 16.56 (0.03) 16.55 (0.004) 16.55 (0.004)
r magnitude 16.60 (0.005) 16.61 (0.02) 16.61 (0.005) 16.61 (0.005)
i magnitude 16.71 (0.006) 16.73 (0.02) 16.72 (0.006) 16.72 (0.006)
z magnitude 16.87 (0.01) 16.88 (0.02) 16.88 (0.01) 16.88 (0.01)
G magnitude 16.51 (0.006) 16.54 16.51 16.51 (0.003) 16.54
BP magnitude 16.57 (0.006) 16.55 16.55
RP magnitude 16.40 (0.005) 16.41 16.41
Pan g magnitude 16.56 (0.004) 16.56 (0.005)
Pan r magnitude 16.60 (0.005) 16.60 (0.005)
Pan i magnitude 16.72 (0.002) 16.72 (0.002)
Pan z magnitude 16.88 (0.003) 16.88 (0.003)
Pan y magnitude 16.96 (0.01) 16.96 (0.02)
E(B-V) 0.002

* 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.