EGGR 262

All names: LHS 6370, WDJ210144.81+314839.47, EGGR 262, LP 340-428, USNO 191, Gaia DR3 1864760695541016832, G187-15, USNO-B1.0 1218-00549229, PM J21017+3148, PLX 5049.01, L 1504-14, WD 2059+316, UBV M 42726, 2MASS J21014481+3148395, G 187-15, L 1504-147, Gaia DR2 1864760695541016832, UCAC4 610-117189, 21017+3148, J2101+3148, LTT 16151, LSPM J2101+3148, G 211-8, NLTT 50377, GEN# +9.80187015, TIC 428831740, KPD 2059+3137, Gaia EDR3 1864760695541016832

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Coutu et al. 2019 Gaia DR2 Stilism Limoges et al. 2015 Dufour et al. 2005 Bergeron et al. 2001 Weidemann and Koester 1995 Koester et al. 1982a Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999) Wegner 1983
Right ascension 21 01 44.53 (0.01) 21 01 44.54 (0.02) 21 01 44.77 21 01 44.54 (0.02) 21 01 44.53 21 01 44.81 (0.01) 21 01 44.54 21 01 45.67
Declination 31 48 34.30 (0.02) 31 48 34.46 (0.03) 31 48 38.63 31 48 34.46 (0.03) 31 48 34.30 31 48 39.47 (0.02) 31 48 34.46 31 48 50.76
Spectral type DQ DQ DQ DQ DQ DQ DQ DC DC DQ5 DQ5
Effective temperature [K] 9851.0 (103) 9206.0 (32) 9732.1 (42) 9100.0 (348) 9800.0 (4381) 9360.0 (350) 10080.0 (390) 9000.0 10000.0 (500) 9810.0 (41) 9000.0
log(g) [cgs] 8.06 (0.02) 7.88 (0.004) 8.05 (0.01) 7.86 8.01 (0.2) 7.87 (0.2) 8.08 (0.2) 8.06 (0.007) 8.00 (0)
Mass [M] 0.614 (0.01) 0.508 (0.004) 0.4979 0.59 (0.1) 0.5 (0.1) 0.63 (0.1) 0.53 (0.1) 0.615 (0.006)
log(Luminosity) [L] -2.88 -2.87 (0.1)
Cooling age [Gyr] 0.6900 0.6640 0.7200 (0.2)
log(H/He)
log(C/He) -4.73 -4.9681 (0.08) -3.99 (0.3) -4.7 -7
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] 31.02 (0.02) 31.02 (0.02) 31.03 (0.03) 31.03 (0.03) 31.03 31.03 (0.03) 29.00 (4) 29.00 (4) 0.03 31.02 31.02 (0.02) 31.03 (0.03) 28.00 (3)
Distance [pc] 32.24 (0.02) 32.24 (0.02) 32.23 (0.03) 32.22 (0.03) 32.22 (0.03) 32.22 (0.03) 34.50 (6) 34.48 (4) 34482.76 32.24 32.24 (0.02) 32.22 (0.03) 35.71 (4)
Composition He He He He He He He
Proper motion (right ascension) [mas/yr] -221.7558686 (0.02) -221.9426295 (0.04) -221.756 (0.02) -221.9426295
Proper motion (declination) [mas/yr] -323.4380954 (0.02) -323.3815366 (0.06) -323.438 (0.02) -323.3815366
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.15 15.11
V magnitude 15.04
R magnitude 14.97 15.35 (0.1)
I magnitude 14.90
J magnitude 14.99 (0.01) 14.94 14.97 (0.05)
H magnitude 14.93 (0.07) 14.97 14.93 (0.07)
K magnitude 14.98 (0.1) 14.98 14.98 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 15.00 (0.0009) 15.02 15.02 15.00 15.00 (0.003) 15.02
BP magnitude 15.04 (0.0009) 15.02 15.02
RP magnitude 14.92 (0.0009) 14.92 14.92
Pan g magnitude 15.03 (0.003) 15.03 (0.002)
Pan r magnitude 15.11 (0.002) 15.11 (0.002)
Pan i magnitude 15.26 (0.002) 15.26 (0.001)
Pan z magnitude 15.43 (0.005) 15.43 (0.006)
Pan y magnitude 15.53 (0.006) 15.53 (0.005)
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.