LB 874

All names: USNO-B1.0 0746-00315781, Gaia DR3 6265082680310200448, SDSS J154023.62-152340.9, SDSS J154023.62-152341.0, LB 874, WD1537-152, Gaia EDR3 6265082680310200448, EC 15375-1514, WD 1537-152, WDJ154023.67-152341.24, TIC 348083644, 2MASS J15402367-1523412, J1540-1523, Gaia DR2 6265082680310200448, GALEX J154023.6-152340

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 Kilic et al. 2020 MWDD H Gaia DR2 Stilism Gianninas et al. 2011 Koester et al. 2009 Koester et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 15 40 23.57 (0.04) 15 40 23.57 (0.06) 15 40 23.80 15 40 23.57 15 40 23.67 (0.04) 15 40 23.57 15 40 23.71
Declination -15 23 40.63 (0.03) -15 23 40.65 (0.04) -15 23 43.00 -15 23 40.63 -15 23 41.23 (0.03) -15 23 40.65 -15 23 38.40
Spectral type DA DA DA DA DA DA DA2.9 DA4
Effective temperature [K] 15994.0 (173) 15994.0 (173) 14501.0 17110.0 (270) 16954.0 (29) 16580.0 (51) 15998.0 (218)
log(g) [cgs] 8.02 (0.009) 8.02 (0.01) 7.91 8.11 (0.05) 7.94 (0.006) 7.88 (0.01) 8.02 (0.01)
Mass [M] 0.627 (0.008) 0.625 (0.008) 0.562 0.68 (0.03) 0.55 0.625 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 0.1908
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 11.35 (0.04) 11.33 (0.06) 11.35 11.35 (0.04) 11.33 (0.06)
Distance [pc] 88.08 (0.3) 88.26 (0.5) 87.00 88.08 88.08 (0.3) 88.26 (0.5)
Composition H H H
Proper motion (right ascension) [mas/yr] -89.054022 (0.06) -89.10356987 (0.1) -89.054 (0.06) -89.10356987
Proper motion (declination) [mas/yr] 37.61577291 (0.04) 37.72375458 (0.09) 37.616 (0.04) 37.72375458
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.97
V magnitude 15.90 15.90 15.90
R magnitude 16.20
I magnitude
J magnitude 16.36 (0.1)
H magnitude 16.46 (0.2)
K magnitude
u magnitude 16.02 (0.006) 16.02 (0.006)
g magnitude 15.78 (0.004) 15.78 (0.004)
r magnitude 16.08 (0.004) 16.08 (0.004)
i magnitude 16.36 (0.005) 16.36 (0.005)
z magnitude 16.60 (0.01) 16.60 (0.01)
G magnitude 15.95 (0.003) 15.97 15.95 15.95 (0.003) 15.97
BP magnitude 15.90 (0.003) 15.88 15.88
RP magnitude 16.07 (0.004) 16.07 16.07
Pan g magnitude 15.85 (0.003)
Pan r magnitude 16.11 (0.002)
Pan i magnitude 16.38 (0.003)
Pan z magnitude 16.63 (0.004)
Pan y magnitude 16.78 (0.005)
E(B-V) 0.010

* 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.