HE 0308-2305

All names: GALEX J031107.1-225404, MCT 0308-2305, Gaia DR3 5075443981321647744, HE0308-2305, EC 03089-2305, HE 0308-2305, J0311-2254, USNO-B1.0 0670-00036167, 2MASS J03110714-2254050, UCAC4 336-003565, WD 0308-230, Gaia EDR3 5075443981321647744, UCAC2 22608076, TIC 71469312, Gaia DR2 5075443981321647744, WDJ031107.13-225405.27

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Jewett et al. 2024 Bergeron et al. 2021 MWDD H Gaia DR2 Stilism Koester et al. 2014 Koester et al. 2009 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 03 11 07.12 (0.03) 03 11 07.12 (0.03) 03 11 07.12 03 11 07.13 (0.03) 03 11 07.12 03 11 06.84
Declination -22 54 05.87 (0.03) -22 54 05.85 (0.04) -22 54 05.87 -22 54 05.26 (0.03) -22 54 05.85 -22 54 00.72
Spectral type DA DA DA DA DA DA
Effective temperature [K] 22184.0 (392) 25943.0 (450) 22193.0 25066.0 (340) 23565.0 (41) 24479.0 (289)
log(g) [cgs] 8.51 8.62 (0.06) 8.52 8.59 (0.09) 8.54 (0.006) 8.60 (0.01)
Mass [M] 0.94 (0.01) 1.009 (0.04) 0.946 0.981 (0.04) 0.995 (0.008)
log(Luminosity) [L]
Cooling age [Gyr] 0.1500 (0.01) 0.1136 0.1485
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) <-7.80
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] 17.94 (0.04) 18.08 (0.05) 17.94 17.94 (0.04) 18.08 (0.05)
Distance [pc] 55.74 (0.1) 55.00 55.31 (0.2) 55.74 55.74 (0.1) 55.31 (0.2)
Composition H H H
Proper motion (right ascension) [mas/yr] -16.71641998 (0.04) -16.58911176 (0.09) -16.716 (0.04) -16.58911176
Proper motion (declination) [mas/yr] -37.77261451 (0.04) -37.70517152 (0.1) -37.773 (0.04) -37.70517152
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.16 15.01 (0.04)
V magnitude 15.08 (0.06) 15.08 (0.06)
R magnitude 15.45 (0.1)
I magnitude
J magnitude 15.64 (0.06)
H magnitude 15.68 (0.1)
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 15.13 (0.002) 15.15 15.13 15.13 (0.003) 15.15
BP magnitude 15.02 (0.002) 14.99 14.99
RP magnitude 15.35 (0.002) 15.35 15.35
Pan g magnitude 15.00 (0.005)
Pan r magnitude 15.34 (0.002)
Pan i magnitude 15.67 (0.003)
Pan z magnitude 15.96 (0.003)
Pan y magnitude 16.14 (0.004)
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.