WD 1225+637

All names: SDSS J122733.45+633029.5, Gaia DR2 1583921850718408960, WDJ122733.45+633029.44, GALEX J122733.2+633027, WD 1225+637, SDSS J122733.43+633029.5, SDSS J122733.46+633029.5, SDSS J122733.41+633029.3, Gaia EDR3 1583921850718408960, Gaia DR3 1583921850718408960, SDSS J122733.42+633029.4, J1227+6330

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Caron et al. 2023 Coutu et al. 2019 MWDD H MWDD HE Gaia DR2 Stilism Dufour et al. 2007 Harris et al. 2003 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 12 27 33.10 (0.08) 12 27 33.41 12 27 33.45 12 27 33.11 (0.1) 12 27 33.10 12 27 33.45 (0.08) 12 27 33.11 12 27 33.43 12 27 33.26 12 27 33.46
Declination 63 30 29.23 (0.08) 63 30 29.38 63 30 29.44 63 30 29.24 (0.1) 63 30 29.23 63 30 29.45 (0.08) 63 30 29.24 63 30 29.58 63 30 24.84 63 30 29.51
Spectral type DZ DZ DZ DZ DZ DZ DZ DZ DZ DZ DZ
Effective temperature [K] 7803.0 (101) 7418.0 (82) 9116.0 8847.0 7270.0 (60) 7538.0 (133) 10080.0 (6) 10080.0 (6)
log(g) [cgs] 8.16 (0.02) 8.07 8.44 8.36 8.00 8.03 (0.03) 8.70 (0.3) 9.67 (0.4)
Mass [M] 0.678 (0.02) 0.6194 0.882 0.811 0.591 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 1.5400 1.4900 1.7060 1.5460
log(H/He) -3.0 <-4.0511 <-4.0
log(C/He)
log(Ca/He) -8.36 -8.7057 (0.09) -8.71 (0.04)
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] 10.25 (0.1) 10.33 (0.1) 10.33 10.33 (0.1) 10.25 10.25 (0.1) 10.33 (0.1)
Distance [pc] 97.57 (1) 96.81 (1) 96.79 (1) 96.79 (1) 95.00 97.57 97.56 (1) 96.79 (1)
Composition He He He
Proper motion (right ascension) [mas/yr] -147.8014579 (0.1) -147.6492753 (0.2) -147.801 (0.1) -147.649 -143.4
Proper motion (declination) [mas/yr] -13.3724256 (0.1) -13.21255254 (0.2) -13.372 (0.1) -13.213 -13.0
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude 18.85 (0.02) 18.90 (0.02) 18.85 18.86 (0.02) 18.90 (0.02) 18.91 (0.03) 18.85 18.89 (0.03)
g magnitude 18.20 (0.006) 18.22 18.20 (0.006) 18.20 (0.007) 18.23 (0.03) 18.22 18.24 (0.03)
r magnitude 18.16 (0.007) 18.16 18.16 (0.007) 18.16 (0.007) 18.14 (0.06) 18.16 18.14 (0.06)
i magnitude 18.27 (0.009) 18.28 18.27 (0.009) 18.25 (0.01) 18.26 (0.02) 18.28 18.27 (0.02)
z magnitude 18.35 (0.03) 18.43 18.35 (0.03) 18.44 (0.04) 18.44 (0.03) 18.43 18.44 (0.03)
G magnitude 18.13 (0.01) 18.16 18.13 18.13 (0.003) 18.16
BP magnitude 18.24 (0.01) 18.27 18.27
RP magnitude 17.94 (0.02) 17.96 17.96
Pan g magnitude 18.17 (0.008) 18.17 (0.007)
Pan r magnitude 18.16 (0.006) 18.16 (0.006)
Pan i magnitude 18.27 (0.006) 18.27 (0.006)
Pan z magnitude 18.42 (0.009) 18.42 (0.009)
Pan y magnitude 18.49 (0.03) 18.49 (0.03)
E(B-V) 0.007

* 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.