L 870-2

All names: G 271-115, G271-115, WD 0135-052, GJ 64, LAWD 10, PLX 339.1, LHS 1270, J0137-0459, TIC 241392886, SDSS J013759.74-045947.9, LTT 888, PM 01354-0515, USNO-B1.0 0850-00015487, NLTT 5460, CSI-05-01354, UBV 1682, USNO 404, PLX 339.10, Gaia DR2 2480523216087975040, LP 648-24, EGGR 11, WISEA J013759.80-045948.4, WDJ013759.39-045944.67, J0138-0459, Gaia EDR3 2480523216087975040, PHL 7450, CNS5 414, WD0135-052, LFT 142, GEN# +9.80271115, 2MASS J01375934-0459442, LPM 76, L870-2, Gaia DR3 2480523216087975040, L 870-2, LHS 1270A, BPS CS 22962-0006, uvby98 980271115, WD 0135-05

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 Kilic et al. 2020 Gaia DR2 Bedard et al. 2017 Stilism Holberg et al. 2016 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Koester et al. 2009 Holberg et al. 2008 Zuckerman et al. 2003 Koester et al. 2001 Bergeron et al. 2001 Bergeron et al. 1997 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 01 38 00.02 (0.02) 01 38 00.00 (0.03) 01 37 59.28 01 37 59.40 01 38 00.02 01 37 59.39 (0.02) 01 38 00.00 01 37 58.30
Declination -04 59 50.27 (0.01) -04 59 50.10 (0.03) -04 59 42.00 -04 59 45.00 -04 59 50.27 -04 59 44.67 (0.01) -04 59 50.10 -04 59 33.72
Spectral type DA+DA DA DA+DA DA+DA DA DA DA6.9 DA DA DA DA DA DA DA+D1 DA7
Effective temperature [K] 7168.0 (16) 7127.0 (45) 7144.0 (126) 7168.0 (16) 7160.0 (103) 7470.0 (500) 7118.0 7118.0 (165) 7250.0 (103) 6942.0 (10) 7470.0 7554.0 (10) 7140.0 (160) 7140.0 (160) 7161.0 (14)
log(g) [cgs] 7.16 (0.005) 7.23 (0.02) 7.15 (0.03) 7.16 (0.005) 7.75 (0.06) 7.80 (0.1) 7.18 (0.06) 7.83 (0.05) 7.08 (0.01) 7.80 8.23 (0.02) 7.19 (0.06) 7.20 (0.06) 7.15 (0.004)
Mass [M] 0.235 (0.002) 0.283 (0.004) 0.233 (0.009) 0.237 (0.002) 0.43 (0.03) 0.24 (0.01) 0.49 (0.03) 0.74 0.25 (0.01) 0.25 (0.01) 0.235 (0.002)
log(Luminosity) [L] -3.00 -3.00 (0.03) -3.00 (0.03)
Cooling age [Gyr] 0.5500 1.1200 0.6600 0.6600 (0.03) 0.6100 (0.04)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-11.530
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] 79.24 (0.02) 79.24 (0.02) 79.21 (0.04) 79.21 (0.04) 81.00 (3) 81.00 (3) 81.00 (3) 81.00 (3) 81.00 (3) 79.24 79.24 (0.02) 79.21 (0.04) 81.40 (3)
Distance [pc] 12.62 (0.003) 12.62 (0.003) 12.62 (0.006) 12.62 (0.006) 12.00 (0.5) 12.35 (0.4) 12.34 12.30 (0.4) 8.00 12.35 12.35 (0.4) 12.35 (0.4) 12.62 12.62 (0.003) 12.62 (0.006) 12.29 (0.5)
Composition H H H H H H H H
Proper motion (right ascension) [mas/yr] 580.9278879 (0.02) 580.9461844 (0.07) 580.928 (0.02) 580.9461844
Proper motion (declination) [mas/yr] -350.273787 (0.01) -350.1788132 (0.06) -350.274 (0.01) -350.1788132
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity DDu DDu DDu DDU DDu
B magnitude 13.19 13.19 13.19 13.20
V magnitude 12.84 12.86 12.84 12.84 12.86 12.86 12.83
R magnitude 12.63 12.63 12.63 12.80
I magnitude 12.38 12.38 12.38
J magnitude 12.12 (0.03) 12.12 12.12 12.12 12.11 (0.02)
H magnitude 11.94 (0.03) 11.94 11.94 11.94 11.95 (0.02)
K magnitude 11.92 (0.03) 11.92 11.92 11.92 11.97 (0.02)
u magnitude 14.98 (0.03) 14.98 (0.01) 14.98 (0.01)
g magnitude 13.10 (0.001) 13.10 (0.001)
r magnitude 12.86 (0.001) 12.86 (0.001)
i magnitude 12.84 (0.001) 12.84 (0.001)
z magnitude 13.89 (0.01) 13.89 (0.01)
G magnitude 12.74 (0.0005) 12.76 12.74 12.74 (0.003) 12.76
BP magnitude 12.92 (0.0005) 12.92 12.92
RP magnitude 12.43 (0.0005) 12.44 12.44
Pan g magnitude 12.95 (0.001) 12.95 (0.001)
Pan r magnitude 13.08 (0.001) 13.08 (0.001)
Pan i magnitude 12.79 (0.001) 12.79 (0.001)
Pan z magnitude 12.83 (0.001) 12.83 (0.001)
Pan y magnitude 12.86 (0.0006) 12.86 (0.0006)
E(B-V) 0.000

* 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.