EGGR 155

All names: USNO 198, GJ 1273, LHS 3857, SDSS J224905.75+223632.3, PM J22490+2236, Gaia DR3 2836609093355562496, Gaia EDR3 2836609093355562496, UBV M 53622, USNO-B1.0 1126-00645578, WIRED J224905.75+223632.3, PG 2246+223, EGGR 155, PLX 5524.01, GEN# +9.80067023, PM 22466+2221, SDSS J224905.73+223632.3, 22490+2236, G 128-4, WD 2246+223, TIC 435825249, CNS5 5629, WISEA J224905.94+223632.5, SDSS J224905.72+223632.3, NLTT 54945, LTT 18580, CSI+22-22466, UBV 19552, DGF 7, J2249+2236, G 127-58, WDJ224905.55+223631.99, 2MASS J22490546+2236318, SDSS J224905.76+223632.3, G67-23, LSPM J2249+2236, G 67-23, Gaia DR2 2836609093355562496, WD 2246+22, JP11 5936

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 Kilic et al. 2020 McCleery et al. 2020 MWDD H Gaia DR2 Bedard et al. 2017 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Holberg et al. 2008 Liebert et al. 2005 Zuckerman et al. 2003 Bergeron et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 22 49 06.15 (0.02) 22 49 05.73 22 49 06.14 (0.04) 22 49 06.14 (0.04) 22 49 05.52 22 49 06.15 22 49 05.55 (0.02) 22 49 06.14 22 49 04.22 22 49 05.76
Declination 22 36 32.94 (0.02) 22 36 32.31 22 36 32.91 (0.04) 22 36 32.91 (0.04) 22 36 28.80 22 36 32.94 22 36 31.99 (0.02) 22 36 32.91 22 36 23.04 22 36 32.31
Spectral type DA DA DA DA DA DA DA DA DA DA4.7 DA DA DA DA DA DA DA4.7 DA DA5 DA DA
Effective temperature [K] 10135.0 (34) 10534.0 (101) 10304.0 (30) 10072.0 (33) 10497.2 (52) 10279.0 10484.0 (153) 10212.0 (326) 10470.0 (151) 10647.0 10375.0 (326) 10720.0 (155) 10650.0 (153) 10171.0 10330.0 (300) 10342.0 (58) 10420.0 (17)
log(g) [cgs] 8.62 (0.005) 8.66 (0.02) 8.64 (0.004) 8.61 (0.005) 8.66 (0.009) 8.63 8.65 (0.05) 8.33 (0.09) 8.66 (0.05) 8.57 (0.09) 8.89 (0.05) 8.80 (0.05) 8.50 8.57 (0.09) 8.64 (0.007) 8.87 (0.01)
Mass [M☉] 0.993 (0.004) 1.021 (0.01) 1.007 (0.003) 0.987 (0.004) 1.004 1.11 (0.2) 0.81 (0.06) 1.02 (0.03) 0.96 (0.06) 1.14 (0.02) 1.1 (0.02) 0.97 (0.06) 1.008 (0.005) 1.104 (0.005)
log(Luminosity) [L☉] -3.18 -3.13 -3.26 -3.14 (0.07)
Cooling age [Gyr] 1.8900 1.7810 1.0700 1.5200 2.1878 1.5600 (0.3)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-9.885
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] 56.08 (0.03) 56.08 (0.03) 56.12 (0.07) 56.12 (0.07) 56.12 (0.07) 52.50 (4) 52.50 (4) 52.50 (4) 52.50 (4) 52.50 (4) 56.08 56.08 (0.03) 56.12 (0.07) 52.60 (4)
Distance [pc] 17.83 (0.01) 17.83 (0.01) 17.82 (0.02) 17.82 (0.02) 17.82 (0.02) 18.90 (2) 19.05 (1) 19.00 (2) 19.04 19.10 (2) 15.00 19.05 16.00 19.05 (1) 17.83 17.83 (0.01) 17.82 (0.02) 19.01 (1)
Composition H H H H H H H H H H
Proper motion (right ascension) [mas/yr] 522.6479776 (0.03) 522.7392767 (0.1) 522.648 (0.03) 522.739
Proper motion (declination) [mas/yr] 59.55113114 (0.03) 59.63249888 (0.07) 59.551 (0.03) 59.632
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.56 14.56 14.55
V magnitude 14.36 14.39 14.35 14.39
R magnitude 14.34 14.34 13.80
I magnitude 14.25 14.25
J magnitude 14.32 (0.01) 14.28 14.28 14.34 (0.03)
H magnitude 14.32 (0.05) 14.31 14.31 14.32 (0.05)
K magnitude 14.36 (0.09) 14.37 14.37 14.36 (0.09)
u magnitude 14.73 (0.003) 14.72 (0.003) 14.73 (0.003) 14.73 (0.003) 14.79 (0.05)
g magnitude 14.32 (0.003) 14.32 (0.003) 14.32 (0.003) 14.34 (0.01)
r magnitude 14.47 (0.003) 14.47 (0.003) 14.47 (0.003) 14.49 (0.02)
i magnitude 14.59 (0.003) 14.59 (0.003) 14.59 (0.003) 14.56 (0.03)
z magnitude 14.83 (0.004) 14.83 (0.004) 14.83 (0.004) 14.86 (0.02)
G magnitude 14.37 (0.001) 14.39 14.39 14.37 14.37 (0.003) 14.39
BP magnitude 14.42 (0.001) 14.41 14.41
RP magnitude 14.30 (0.001) 14.31 14.31
Pan g magnitude 14.37 (0.001) 14.39 (0.002)
Pan r magnitude 14.48 (0.004) 14.47 (0.009)
Pan i magnitude 14.62 (0.003) 14.61 (0.002)
Pan z magnitude 14.79 (0.002) 14.76 (0.004)
Pan y magnitude 14.90 (0.008) 14.91 (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.