EGGR 557

All names: USNO-B1.0 0715-00865018, WD2336-187, TIC 66419115, WD 2336-187, Gaia EDR3 2393875961742886656, MCT 2336-1842, G273-97, Gaia DR3 2393875961742886656, 2MASS J23385279-1826123, G 273-97, Gaia DR2 2393875961742886656, WDJ233852.80-182612.68, EGGR 557, EC 23362-1842, ATO J354.7203-18.4374, J2338-1826

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 Bergeron et al. 2021 MWDD H Gaia DR2 Stilism 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 23 38 52.89 (0.03) 23 38 52.88 (0.04) 23 38 52.80 23 38 52.89 23 38 52.80 (0.03) 23 38 52.88 23 38 52.97
Declination -18 26 14.92 (0.03) -18 26 14.85 (0.04) -18 26 12.00 -18 26 14.92 -18 26 12.68 (0.03) -18 26 14.85 -18 26 10.32
Spectral type DA DA DA DA DA DA DA DA6.4 DA
Effective temperature [K] 7901.0 (84) 7852.0 (30) 7711.0 (126) 7762.0 7920.0 (116) 7774.0 (9) 8118.0 (10) 7867.0 (47)
log(g) [cgs] 7.75 (0.02) 7.72 (0.007) 7.39 (0.1) 7.69 7.91 (0.07) 7.49 (0.01) 7.96 (0.02) 7.73 (0.01)
Mass [M] 0.465 (0.006) 0.444 (0.005) 0.307 (0.05) 0.429 0.54 (0.04) 0.57 0.447 (0.008)
log(Luminosity) [L]
Cooling age [Gyr] 0.8400 0.6143 0.7940
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] 26.88 (0.04) 26.88 (0.04) 26.81 (0.05) 26.81 (0.05) 26.88 26.88 (0.04) 26.81 (0.05)
Distance [pc] 37.21 (0.05) 37.20 (0.06) 37.30 (0.07) 37.00 37.31 (0.07) 34.00 37.21 37.21 (0.05) 37.31 (0.07)
Composition H H H H
Proper motion (right ascension) [mas/yr] 76.51920004 (0.04) 76.60153603 (0.08) 76.519 (0.04) 76.60153603
Proper motion (declination) [mas/yr] -140.3729765 (0.03) -140.2913983 (0.07) -140.373 (0.04) -140.2913983
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.60 15.60
V magnitude 15.60
R magnitude 15.20
I magnitude
J magnitude 15.06 (0.04) 15.06 (0.04)
H magnitude 14.94 (0.06) 14.94 (0.06)
K magnitude 14.68 (0.09) 14.68 (0.09)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 15.49 (0.004) 15.51 15.49 15.49 (0.003) 15.51
BP magnitude 15.62 (0.004) 15.62 15.62
RP magnitude 15.24 (0.003) 15.24 15.24
Pan g magnitude 15.61 (0.003) 15.61 (0.003)
Pan r magnitude 15.55 (0.002) 15.55 (0.002)
Pan i magnitude 15.57 (0.005) 15.57 (0.003)
Pan z magnitude 15.64 (0.005) 15.64 (0.005)
Pan y magnitude 15.70 (0.004) 15.70 (0.003)
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.