WD 1025+197

All names: Gaia DR2 624510170646474112, J1027+1928, Gaia EDR3 624510170646474112, TIC 171600672, 2MASS J10274785+1928246, LSPM J1027+1928, SDSS J102747.64+192824.2, USNO-B1.0 1094-00181373, WIRED J102747.63+192824.1, NLTT 24406, GALEX J102747.6+192824, Gaia DR3 624510170646474112, PSO J156.9478+19.4732, LP 430-25, WD 1025+197, SDSS J102747.64+192824.1, SDSS J102747.63+192824.1, WDJ102747.78+192824.44

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 Caron et al. 2023 Kilic et al. 2020 Blouin et al. 2019 MWDD H Gaia DR2 Stilism Sayres et al. 2012 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 10 27 47.34 (0.07) 10 27 47.64 10 27 47.36 (0.1) 10 27 47.80 10 27 47.34 10 27 47.78 (0.07) 10 27 47.36 10 27 47.64
Declination 19 28 23.52 (0.07) 19 28 24.13 19 28 23.55 (0.1) 19 28 24.60 19 28 23.52 19 28 24.44 (0.07) 19 28 23.55 19 28 24.18
Spectral type DA DA DA DA DA6.0 DA6.0 DA DA6 DA DA DA
Effective temperature [K] 7178.0 (43) 7260.0 (38) 7178.0 (43) 7075.0 (65) 7093.0 7140.0 (70) 7251.0 (74) 7006.0 (31)
log(g) [cgs] 8.39 (0.01) 8.43 (0.01) 8.40 (0.01) 8.38 (0.02) 8.38 8.34 (0.1) 8.40 (0.02) 8.12 (0.05)
Mass [M] 0.842 (0.01) 0.867 (0.01) 0.849 (0.01) 0.837 (0.01) 0.836 0.852 (0.01) 0.662 (0.03)
log(Luminosity) [L]
Cooling age [Gyr] 3.4000 3.2300 (0.1) 3.1980
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] 22.11 (0.09) 22.30 (0.1) 22.30 (0.1) 22.30 (0.1) 22.11 22.11 (0.09) 22.30 (0.1)
Distance [pc] 45.22 (0.2) 44.84 (0.3) 44.84 (0.3) 44.84 (0.3) 59.50 45.22 45.22 (0.2) 44.84 (0.3)
Composition H H H H H
Proper motion (right ascension) [mas/yr] -383.8146622 (0.08) -383.7413369 (0.2) -383.815 (0.08) -383.741
Proper motion (declination) [mas/yr] -57.56435212 (0.07) -57.72603267 (0.2) -57.564 (0.07) -57.726
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 17.80
V magnitude
R magnitude 17.02
I magnitude
J magnitude 16.62 (0.02) 16.42 (0.1) 16.42 (0.1) 16.42 (0.1)
H magnitude 16.45 (0.2) 16.45 (0.2) 16.45 (0.2) 16.45 (0.2)
K magnitude 16.94 (0.03) 16.94
u magnitude 17.87 (0.01) 17.87 (0.01) 17.88 (0.01) 17.87 (0.01) 17.87 (0.01) 17.89 (0.02)
g magnitude 17.38 (0.005) 17.39 (0.005) 17.38 (0.003) 17.38 (0.005) 17.42 (0.02)
r magnitude 17.22 (0.005) (0.005) 17.23 (0.005) 17.22 (0.005) 17.23 (0.02)
i magnitude 17.18 (0.006) 17.18 (0.005) 17.18 (0.006) 17.18 (0.006) 17.18 (0.02)
z magnitude 17.24 (0.01) 17.25 (0.01) 17.26 (0.007) 17.24 (0.01) 17.25 (0.02)
G magnitude 17.20 (0.01) 17.21 17.20 17.20 (0.003) 17.21
BP magnitude 17.38 (0.01) 17.38 17.38
RP magnitude 16.88 (0.006) 16.89 16.89
Pan g magnitude 17.38 (0.004) 17.38 (0.003) 17.38 (0.003)
Pan r magnitude 17.23 (0.006) 17.23 (0.005) 17.23 (0.005)
Pan i magnitude 17.23 (0.01) 17.23 (0.01) 17.23 (0.01)
Pan z magnitude 17.26 (0.007) 17.26 (0.007) 17.26 (0.007)
Pan y magnitude 17.27 (0.02) 17.27 (0.03) 17.27 (0.03)
E(B-V) 0.001

* 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.