EGGR 472

All names: WDJ024208.44+111233.00, G 76-23, G 4-34, NLTT 8732, PM J02421+1112, TIC 377056497, J0242+1112, WD 0239+11, GALEX J024208.4+111231, WD 0239+109, Gaia DR2 25405350031335296, 02421+1112, LTT 10886, 0239+109, WD0239+109, EGGR 472, USNO-B1.0 1012-00024471, 2MASS J02420845+1112329, LSPM J0242+1112, WD 0239+10, Gaia DR3 25405350031335296, uvby98 980004034, Gaia EDR3 25405350031335296

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Leggett et al. 2018 MWDD H Gaia DR2 Stilism Ferrario et al. 2015 Limoges et al. 2015 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 02 42 08.63 (0.04) 02 42 08.62 (0.05) 02 42 08.62 (0.05) 02 42 08.50 02 42 08.63 02 42 08.44 (0.04) 02 42 08.62 02 42 08.21
Declination 11 12 28.31 (0.04) 11 12 28.46 (0.06) 11 12 28.46 (0.06) 11 12 32.00 11 12 28.31 11 12 33.01 (0.04) 11 12 28.46 11 12 39.60
Spectral type DAH DAH DAH DA DA DAH DA DA+DB DA DA5.0 DA6
Effective temperature [K] 8283.0 (107) 8333.0 (30) 8299.3 (61) 8245.0 10060.0 8510.0 (196) 10060.0 (252) 46859.0 (569) 8239.0 (69)
log(g) [cgs] 8.41 (0.03) 8.43 (0.006) 8.42 (0.02) 8.41 8.73 8.00 (0) 8.73 (0.04) 7.69 (0.05) 8.41 (0.01)
Mass [M] 0.859 (0.02) 0.871 (0.005) 0.857 0.6 (0.1) 1.06 (0.02) 0.857 (0.01)
log(Luminosity) [L] -3.11
Cooling age [Gyr] 2.3000 2.1350
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] 29.51 (0.05) 29.51 (0.05) 29.50 (0.07) 29.50 (0.07) 26.28 (1) 29.50 (0.07) 29.51 29.51 (0.05) 29.50 (0.07)
Distance [pc] 33.89 (0.06) 33.89 (0.06) 33.90 (0.08) 33.90 (0.08) 38.05 (1) 33.90 (0.08) 45.90 (8) 36.00 33.89 33.89 (0.06) 33.90 (0.08)
Composition H H H H H
Proper motion (right ascension) [mas/yr] 170.6408589 (0.05) 170.7765367 (0.1) 170.641 (0.05) 170.7765367
Proper motion (declination) [mas/yr] -293.6406901 (0.05) -293.4830089 (0.1) -293.641 (0.05) -293.4830089
Variability
Magnetic yes yes yes
Bd [MG] 0.725 (0.03) 0.7
Infrared excess (disk)
Binarity DDu
B magnitude 16.20
V magnitude 16.18
R magnitude 16.10
I magnitude
J magnitude 15.74 (0.01) 15.58 (0.06)
H magnitude 15.91 (0.2) 15.91 (0.2)
K magnitude 15.43 (0.2) 15.43 (0.2)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 16.10 (0.004) 16.12 16.12 16.10 16.10 (0.003) 16.12
BP magnitude 16.23 (0.004) 16.22 16.22
RP magnitude 15.90 (0.005) 15.90 15.90
Pan g magnitude 16.21 (0.003) 16.21 (0.003)
Pan r magnitude 16.16 (0.004) 16.16 (0.004)
Pan i magnitude 16.22 (0.002) 16.22 (0.002)
Pan z magnitude 16.33 (0.001) 16.33 (0.002)
Pan y magnitude 16.38 (0.007) 16.38 (0.008)
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.