GJ 772

All names: CSI-01-19539, uvby98 980092040, SDSS J195629.08-010236.0, JP11 5173, UBV 16993, 2MASS J19562925-0102317, LAWD 79, WDS J19565-0103A, SDSS J195629.08-010235.9, Gaia EDR3 4235280071072332672, ** WSI 118A, LFT 1503, G92-40, GEN# +6.10010772, WD 1953-01, USNO 183, CNS5 4935, J1956-0102, EGGR 135, NLTT 48454, LPM 714, LP 634-1, TIC 251903434, WD 1953-011, L 997-21, LTT 7879, GJ 772, WDJ195629.23-010232.67, LHS 3501, UBV M 42985, UCAC4 445-120388, GCRV 21671, Gaia DR3 4235280071072332672, G 92-40, PLX 4709.00, GEN# +9.80092040, Gaia DR2 4235280071072332672, PLX 4709

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Hardy et al. 2023a Caron et al. 2023 Kilic et al. 2020 Gaia DR2 Bedard et al. 2017 Stilism Holberg et al. 2016 Ferrario et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Koester et al. 2009 Holberg et al. 2008 Zuckerman et al. 2003 Bergeron et al. 2001 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 19 56 28.76 (0.01) 19 56 28.77 (0.02) 19 56 29.04 19 56 28.76 19 56 29.23 (0.01) 19 56 28.77 19 56 30.91
Declination -01 02 43.97 (0.01) -01 02 43.62 (0.01) -01 02 31.20 -01 02 43.97 -01 02 32.67 (0.009) -01 02 43.62 -01 02 08.88
Spectral type DAH DAH DA DA DA DA DC DA DC6.4 DAH DA DAP DA DA DA DA6.4 DA6
Effective temperature [K] 7714.0 (106) 7790.0 (89) 7676.6 (149) 7776.0 (13) 7752.0 (43) 7765.0 (113) 7871.0 (202) 7920.0 (200) 7920.0 7868.0 (202) 7910.0 (115) 7729.0 7920.0 (200) 7783.0 (34)
log(g) [cgs] 8.15 (0.03) 8.17 (0.03) 8.17 (0.2) 8.19 (0.002) 8.18 (0.007) 8.20 (0.06) 8.07 (0.04) 8.23 (0.04) 8.39 (0.06) 8.11 8.23 (0.05) 8.17 (0.007)
Mass [M] 0.689 (0.02) 0.698 (0.02) 0.7006304595837644 (0.3) 0.71 (0.002) 0.702 (0.007) 0.79 (0.1) 0.64 (0.03) 0.74 (0.03) 0.73 (0.03) 0.84 (0.04) 0.74 (0.03) 0.698 (0.006)
log(Luminosity) [L] -3.38 -3.38 (0.03)
Cooling age [Gyr] 1.5900 1.3600 1.6300 1.6300 (0.2)
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H) <-11.272
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] 86.47 (0.02) 86.47 (0.02) 86.48 (0.03) 86.48 (0.03) 87.80 (3) 87.80 (3) 87.80 (3) 87.80 (3) 86.47 86.47 (0.02) 86.48 (0.03) 77.00
Distance [pc] 11.57 (0.002) 11.56 (0.003) 11.56 (0.004) 11.56 (0.004) 11.90 (0.5) 11.39 (0.4) 11.38 11.40 (0.4) 10.00 11.39 11.39 (0.4) 11.57 11.57 (0.002) 11.56 (0.004) 12.99
Composition H H H H H H H
Proper motion (right ascension) [mas/yr] -437.7592092 (0.02) -437.728624 (0.04) -437.759 (0.02) -437.728624
Proper motion (declination) [mas/yr] -706.2146391 (0.01) -706.2418726 (0.03) -706.215 (0.01) -706.2418726
Variability NOV
Magnetic yes yes yes yes
Bd [MG] 0.07 * 0.3 (0.2) 0.5
Infrared excess (disk)
Binarity
B magnitude 13.97 13.97 13.89 (0.04)
V magnitude 13.70 13.69 13.69 13.56 (0.09)
R magnitude 13.50 13.50 13.73 (0.2)
I magnitude 13.31 13.31
J magnitude 13.13 (0.002) 13.12 13.07 13.12 13.07 (0.03)
H magnitude 13.03 (0.03) 13.02 12.89 13.02 13.03 (0.03)
K magnitude 13.01 (0.003) 13.02 12.91 13.02 13.01 (0.04)
u magnitude 14.26 (0.003) 14.26 (0.003) 14.26 (0.003)
g magnitude 13.71 (0.009) 13.71 (0.009)
r magnitude 13.59 (0.009) 13.59 (0.009)
i magnitude 13.71 (0.004) 13.71 (0.004)
z magnitude 13.77 (0.004) 13.77 (0.004)
G magnitude 13.59 (0.005) 13.60 13.59 13.59 (0.003) 13.60
BP magnitude 13.73 (0.005) 13.72 13.72
RP magnitude 13.34 (0.003) 13.34 13.34
Pan g magnitude 13.75 (0.01) 13.75 (0.01)
Pan r magnitude 13.65 (0.006) 13.65 (0.006)
Pan i magnitude 14.12 (0.08) 14.12 (0.08)
Pan z magnitude 13.71 (0.001) 13.71 (0.001)
Pan y magnitude 13.79 (0.002) 13.79 (0.002)
E(B-V) 0.000

* 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.