Gaia DR2 1222865601075380480

All names: Gaia DR2 1222865601075380480, SDSS J154437.64+254855.2, Gaia EDR3 1222865601075380480, Gaia DR3 1222865601075380480, J1544+2548, WDJ154437.64+254855.16, WDJ154437.64+254855.15, SDSS J154437.64+254855.3

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Vincent et al. 2023
Right ascension 15 44 37.64 (0.06) 15 44 37.64 15 44 37.64 15 44 37.64 (0.06) 15 44 37.64
Declination 25 48 55.85 (0.1) 25 48 55.83 25 48 55.85 25 48 55.16 (0.1) 25 48 55.83
Spectral type DC DC DZ DC DZ
Effective temperature [K] 6198.0 (50) 6267.0 (50) 6605.0 6360.0 6412.0 (78)
log(g) [cgs] 7.95 (0.02) 7.99 (0.02) 8.20 8.08 8.15 (0.02)
Mass [M] 0.543 (0.02) 0.567 (0.02) 0.715 0.622 0.669 (0.02)
log(Luminosity) [L]
Cooling age [Gyr] 2.1300 2.6670 2.3600
log(H/He) -3.0 -3.2
log(C/He)
log(Ca/He)
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] 12.81 (0.1) 12.92 (0.2) 12.92 (0.2) 12.81 12.81 (0.1) 12.92 (0.2)
Distance [pc] 78.06 (0.9) 77.40 (1) 77.37 (1) 78.06 78.06 (0.9) 77.37 (1)
Composition He
Proper motion (right ascension) [mas/yr] 0.153520819 (0.07) 0.29289046 (0.2) 0.154 (0.07) 0.29289046
Proper motion (declination) [mas/yr] 43.12857032 (0.1) 43.31703581 (0.3) 43.129 (0.1) 43.31703581
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude
V magnitude
R magnitude
I magnitude
J magnitude 17.76 (0.05)
H magnitude
K magnitude
u magnitude 19.23 (0.03) 19.24 (0.02) 19.24 (0.02)
g magnitude 18.62 (0.008) 18.62 (0.008)
r magnitude 18.36 (0.008) 18.36 (0.008)
i magnitude 18.31 (0.009) 18.31 (0.009)
z magnitude 18.35 (0.03) 18.35 (0.03)
G magnitude 18.37 (0.01) 18.40 18.37 18.37 (0.003) 18.40
BP magnitude 18.58 (0.01) 18.58 18.58
RP magnitude 18.02 (0.01) 18.01 18.01
Pan g magnitude 18.60 (0.01) 18.60 (0.009)
Pan r magnitude 18.38 (0.005) 18.38 (0.004)
Pan i magnitude 18.34 (0.005) 18.34 (0.005)
Pan z magnitude 18.35 (0.009) 18.35 (0.01)
Pan y magnitude 18.35 (0.02) 18.35 (0.02)
E(B-V) 0.016

* 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.