GD 89

All names: WDJ074725.88+440848.32, EGGR 343, FBS 0743+442, GEN# +6.10060089, WD 0743+44, SDSS J074725.84+440847.6, Gaia DR2 926002203218885504, TIC 241182175, Gaia EDR3 926002203218885504, FBS B 246, PM J07474+4408W, USNO-B1.0 1341-00191780, GD 89, J0747+4408, 2MASS J07472588+4408485, LSPM J0747+4408, WD 0743+442, SDSS J074725.87+440848.2, Gaia DR3 926002203218885504, 07474+4408W

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Kilic et al. 2025 O'Brien et al. 2024 Kilic et al. 2020 McCleery et al. 2020 MWDD H Gaia DR2 Stilism Limoges et al. 2015 Gianninas et al. 2011 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 07 47 25.74 (0.03) 07 47 25.75 (0.05) 07 47 25.75 (0.05) 07 47 25.74 07 47 25.88 (0.03) 07 47 25.75 07 47 25.94
Declination 44 08 45.68 (0.02) 44 08 45.76 (0.03) 44 08 45.76 (0.03) 44 08 45.68 44 08 48.32 (0.02) 44 08 45.76 44 08 52.08
Spectral type DA DA DA DA DA DA DA DA DA3.3 DA5
Effective temperature [K] 14704.0 (122) 15198.0 (258) 14704.0 (122) 15015.7 (152) 14850.0 15120.0 (336) 15220.0 (345) 15810.0 (158)
log(g) [cgs] 8.42 (0.006) 8.44 (0.02) 8.42 (0.006) 8.44 (0.01) 8.43 8.47 (0.05) 8.47 (0.05) 8.48 (0.008)
Mass [M] 0.875 (0.005) 0.89 (0.01) 0.874 (0.005) 0.88 0.91 (0.03) 0.91 (0.03) 0.917 (0.006)
log(Luminosity) [L] -2.40
Cooling age [Gyr] 0.4043
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] 26.09 (0.03) 26.09 (0.03) 26.08 (0.06) 26.08 (0.06) 26.09 26.09 (0.03) 26.08 (0.06)
Distance [pc] 38.33 (0.05) 38.33 (0.04) 38.34 (0.08) 38.34 (0.08) 37.50 (1) 39.00 38.33 38.33 (0.05) 38.34 (0.08)
Composition H H H H H
Proper motion (right ascension) [mas/yr] -87.64381721 (0.03) -87.81463782 (0.1) -87.644 (0.03) -87.81463782
Proper motion (declination) [mas/yr] -165.0920205 (0.02) -165.0544718 (0.06) -165.092 (0.02) -165.0544718
Variability NOV
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 14.95
V magnitude
R magnitude 15.00
I magnitude
J magnitude 15.23 (0.04)
H magnitude 15.40 (0.1)
K magnitude 15.18 (0.1)
u magnitude 15.04 (0.004) 15.00 (0.004)
g magnitude 14.79 (0.003) 14.76 (0.003)
r magnitude 15.06 (0.004) 15.04 (0.003)
i magnitude 15.30 (0.004) 15.29 (0.003)
z magnitude 15.56 (0.006) 15.55 (0.006)
G magnitude 14.91 (0.002) 14.93 14.93 14.91 14.91 (0.003) 14.93
BP magnitude 14.87 (0.002) 14.86 14.86
RP magnitude 15.01 (0.003) 15.01 15.01
Pan g magnitude 14.81 (0.003)
Pan r magnitude 15.05 (0.003)
Pan i magnitude 15.32 (0.002)
Pan z magnitude 15.56 (0.002)
Pan y magnitude 15.72 (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.