LSPM J0828+3131

All names: Gaia DR2 709004920527186816, SDSS J082848.87+313134.7, SDSS J082848.87+313134.77, GALEX J082848.8+313133, SDSS J082848.87+313134.8, Gaia DR3 709004920527186816, LSPM J0828+3131, SDSS J082848.86+313134.6, Gaia EDR3 709004920527186816, WDJ082848.89+313134.97, J0828+3131, USNO-B1.0 1215-00163079

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Kilic et al. 2025 Caron et al. 2023 MWDD H MWDD HE Gaia DR2 Stilism Kepler et al. 2015 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Vincent et al. 2023
Right ascension 08 28 48.75 (0.1) 08 28 48.87 08 28 48.76 (0.2) 08 28 48.75 08 28 48.89 (0.1) 08 28 48.76
Declination 31 31 33.13 (0.09) 31 31 34.78 31 31 33.18 (0.1) 31 31 33.13 31 31 34.97 (0.09) 31 31 33.18
Spectral type DC DC DC DC DC DC DC DC
Effective temperature [K] 6042.0 (32) 6168.0 (33) 6571.0 6321.0 10018.0 (1000) 5895.0 (167)
log(g) [cgs] 7.95 (0.02) 8.02 (0.02) 8.25 8.13 6.50 (0.5) 8.01 (0.04)
Mass [M] 0.539 (0.01) 0.584 (0.02) 0.751 0.656 0.577 (0.04)
log(Luminosity) [L]
Cooling age [Gyr] 2.3500 3.0860 2.7990
log(H/He) -3.0 -3.0
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] 14.71 (0.2) 15.00 (0.2) 15.00 (0.2) 14.71 14.71 (0.2) 15.00 (0.2)
Distance [pc] 68.00 (0.7) 66.67 (1) 66.66 (1) 68.00 68.00 (0.7) 66.66 (1)
Composition He
Proper motion (right ascension) [mas/yr] -107.3423351 (0.1) -106.783993 (0.4) -107.342 (0.1) -106.783993
Proper motion (declination) [mas/yr] -115.3350586 (0.1) -115.4009095 (0.3) -115.335 (0.1) -115.4009095
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.20
V magnitude
R magnitude 18.00
I magnitude
J magnitude 17.42 (0.03)
H magnitude
K magnitude
u magnitude 19.10 (0.02) 19.03 (0.02) 19.10 (0.02) 19.10 (0.02) 19.02 (0.02)
g magnitude 18.42 (0.007) 18.42 (0.01) 18.42 (0.007) 18.42 (0.007)
r magnitude 18.15 (0.007) 18.15 (0.01) 18.15 (0.007) 18.19 (0.008)
i magnitude 18.07 (0.008) 18.07 (0.01) 18.07 (0.008) 18.08 (0.009)
z magnitude 18.08 (0.02) 18.08 (0.02) 18.09 (0.02) 18.11 (0.03)
G magnitude 18.16 (0.02) 18.18 18.16 18.16 (0.003) 18.18
BP magnitude 18.39 (0.02) 18.39 18.39
RP magnitude 17.79 (0.02) 17.82 17.82
Pan g magnitude 18.39 (0.006) 18.39 (0.006)
Pan r magnitude 18.15 (0.005) 18.15 (0.004)
Pan i magnitude 18.10 (0.005) 18.10 (0.007)
Pan z magnitude 18.12 (0.005) 18.12 (0.004)
Pan y magnitude 18.15 (0.009) 18.15 (0.008)
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.