EGGR 182

All names: SDSS J085914.63+325712.2, G47-18, Gaia DR3 712888090655562624, SDSS J085914.63+325712.1, WDJ085914.71+325712.16, USNO-B1.0 1229-00220130, Pul -3 470446, Mrk 392, UBV M 53572, TIC 166532159, LSPM J0859+3257, NLTT 20665, GEN# +9.80047018, uvby98 980047018, Ton 368, CSI+33-08562, WIRED J085914.63+325712.1, J0859+3257, WD 0856+331, KUV 410-4, LTT 12531, 08592+3257, G 47-18, GJ 1117, WD 0856+33, 2MASS J08591476+3257121, EGGR 182, PM J08592+3257, KUV 08562+3309, Gaia EDR3 712888090655562624, G 51-32, USNO 229, PLX 2147.01, PG 0856+331, CBS 88, LTT 12351, CNS5 2223, Gaia DR2 712888090655562624

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR12 Kilic et al. 2025 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Coutu et al. 2019 Gaia DR2 Stilism Holberg et al. 2016 Limoges et al. 2015 Sion et al. 2014 Giammichele et al. 2012 Dufour et al. 2005 Bergeron et al. 2001 Bergeron et al. 1997 Weidemann and Koester 1995 Wegner and Yackovich 1984 Koester et al. 1982a Grenfell 1974 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Eisenstein et al. 2006 White Dwarf Catalog (McCook & Sion 1999) Kleinman et al. 2013 Vincent et al. 2023
Right ascension 08 59 14.30 (0.02) 08 59 14.63 08 59 14.31 (0.04) 08 59 14.71 08 59 14.31 (0.04) 08 59 14.64 08 59 14.30 08 59 14.71 (0.02) 08 59 14.31 08 59 14.63 08 59 15.77 08 59 14.63
Declination 32 57 12.10 (0.02) 32 57 12.18 32 57 12.10 (0.03) 32 57 12.16 32 57 12.10 (0.03) 32 57 10.80 32 57 12.10 32 57 12.16 (0.02) 32 57 12.10 32 57 12.18 32 57 00.36 32 57 12.17
Spectral type DQA warmDQ DQ DQ DQ DQ DQ DQ5.1 DQ DQ DQ DQ DQ DQ DQ DQ6 hotDQ DQ DQ6 DQ_CI hotDQ
Effective temperature [K] 9527.0 (22) 10015.0 (102) 9760.0 (18) 9595.4 (58) 9486.0 (206) 9890.0 (244) 10650.0 (166) 9920.0 9986.0 (244) 9920.0 (240) 10390.0 (410) 10390.0 (410) 9600.0 10000.0 9600.0 (1000) 10000.0 9419.0 (23) 10735.0 (87) 12011.0 (166)
log(g) [cgs] 8.46 (0.003) 8.62 (0.02) 8.51 (0.002) 8.53 (0.01) 8.45 8.47 (0.08) 8.82 (0.08) 8.73 (0.08) 8.74 (0.08) 8.84 (0.07) 8.84 (0.07) 8.00 8.44 (0.003) 8.97 (0.04) 9.69 (0.1)
Mass [M] 0.879 (0.003) 0.982 (0.01) 0.912 (0.002) 0.8721 1.05 (0.05) 1.1 (0.04) 1.05 (0.05) 1.05 (0.05) 1.11 (0.04) 1.11 (0.04) 0.99 (0.2) 0.866 (0.003)
log(Luminosity) [L] -3.28 -3.32 -3.33 (0.06) -3.34 (0.06)
Cooling age [Gyr] 1.6700 1.5500 2.0900 2.0900 2.0700 (0.08) 2.8400 (0.1) 0.3500
log(H/He) <-6 -5.0
log(C/He) -3.41 -3.32 -3.5245 (0.02) -2.84 -2.88 (0.08) -3.3 -2.0 -3.3 -2.85
log(Ca/He)
log(Ca/H)
log(N/He) <-9
log(O/He) <-9 -2.3
log(Na/He)
log(Mg/He)
log(Al/He)
log(Si/He)
log(P/He)
log(S/He)
log(Cl/He)
log(Sc/He)
log(Ti/He)
log(V/He)
log(Cr/He)
log(Mn/He)
log(Fe/He)
log(Co/He)
log(Ni/He)
log(Cu/He)
log(Zn/He)
log(Ga/He)
log(Ge/He)
log(Sr/He)
Parallax [mas] 43.36 (0.03) 43.36 (0.03) 43.36 (0.05) 43.36 (0.05) 43.36 43.36 (0.05) 48.80 (3) 48.80 (3) 48.80 (3) 48.80 (3) 48.80 (3) 0.05 43.36 43.36 (0.03) 43.36 (0.05) 49.20 (3)
Distance [pc] 23.06 (0.02) 23.06 (0.02) 23.06 (0.03) 23.06 (0.03) 23.06 (0.03) 23.06 (0.03) 20.49 (1) 20.50 (1) 20.49 20.50 (1) 20.49 (1) 20.49 (1) 20408.16 23.06 23.06 (0.02) 23.06 (0.03) 20.33 (1)
Composition He He He He He He He He He He He
Proper motion (right ascension) [mas/yr] -325.6392967 (0.03) -325.6261241 (0.07) -325.639 (0.03) -325.626 -320.8
Proper motion (declination) [mas/yr] -3.548052798 (0.02) -3.585499657 (0.05) -3.548 (0.03) -3.585 -1.3
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.19 15.19 15.19 15.18
V magnitude 15.18 15.16 15.16 15.16
R magnitude 15.03 15.03 15.03 14.90
I magnitude 14.97 14.97 14.97
J magnitude 15.16 (0.007) 15.12 15.12 15.12 15.17 (0.04)
H magnitude 15.16 (0.08) 15.09 15.09 15.09 15.16 (0.08)
K magnitude 15.31 (0.2) 15.11 15.11 15.11 15.31 (0.2)
u magnitude 15.11 (0.004) 15.11 (0.004) 15.11 (0.004) 15.11 (0.004) 15.10 (0.02) 15.10 15.12 (0.02)
g magnitude 15.08 (0.003) 15.08 (0.003) 15.08 (0.003) 15.08 (0.02) 15.08 15.09 (0.02)
r magnitude 15.14 (0.003) 15.14 (0.003) 15.14 (0.003) 15.14 (0.01) 15.14 15.15 (0.02)
i magnitude 15.29 (0.004) 15.29 (0.004) 15.29 (0.004) 15.28 (0.01) 15.27 15.29 (0.01)
z magnitude 15.50 (0.006) 15.50 (0.006) 15.50 (0.006) 15.49 (0.02) 15.49 15.50 (0.02)
G magnitude 15.07 (0.002) 15.09 15.09 15.07 15.07 (0.003) 15.09
BP magnitude 15.11 (0.002) 15.06 15.06
RP magnitude 14.98 (0.002) 14.98 14.98
Pan g magnitude 15.14 (0.003) 15.14 (0.003)
Pan r magnitude 15.16 (0.0002) 15.16 (0.0002)
Pan i magnitude 15.32 (0.002) 15.32 (0.003)
Pan z magnitude 15.49 (0.002) 15.49 (0.002)
Pan y magnitude 15.62 (0.005) 15.62 (0.006)
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.