GD 84

All names: 07180+4547, LSPM J0718+4547, GD 84, LP 162-3, WD 0714+45, PM J07180+4547, 0714+458, NLTT 17637, EGGR 215, Gaia DR3 974375354722176768, 2MASS J07180189+4547531, J0718+4547, TIC 156939760, GALEX J071801.8+454752, Gaia DR2 974375354722176768, WDJ071801.90+454753.07, USNO-B1.0 1357-00195987, WD 0714+458, Gaia EDR3 974375354722176768, GEN# +6.10060084

Parameter Unit Gaia EDR3 Pan-STARRS DR1 O'Brien et al. 2024 Caron et al. 2023 McCleery et al. 2020 Leggett et al. 2018 MWDD H MWDD HE Gaia DR2 Stilism Limoges et al. 2015 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 07 18 01.73 (0.03) 07 18 01.73 (0.04) 07 18 01.73 (0.04) 07 18 01.73 07 18 01.90 (0.03) 07 18 01.73 07 18 01.78
Declination 45 47 50.18 (0.03) 45 47 50.27 (0.05) 45 47 50.27 (0.05) 45 47 50.18 45 47 53.07 (0.03) 45 47 50.27 45 47 56.76
Spectral type DC DC DC DQ5.0 DC DC DC DC DBAZ?6 DBA6
Effective temperature [K] 9935.0 (120) 9613.0 (46) 9759.5 (81) 10007.0 (393) 10113.0 10121.0 8890.0 (158) 9885.0 (79)
log(g) [cgs] 8.05 (0.03) 7.95 (0.007) 8.01 (0.02) 8.12 (0.04) 8.19 8.13 8.00 (0) 8.04 (0.01)
Mass [M] 0.609 (0.02) 0.551 (0.006) 0.652 (0.04) 0.719 0.659 0.58 (0.1) 0.603 (0.01)
log(Luminosity) [L] -3.05
Cooling age [Gyr] 0.6800 0.7420 (0.09) 0.7753 0.7320
log(H/He) -4.4
log(C/He)
log(Ca/He)
log(Ca/H)
log(N/He)
log(O/He)
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] 28.18 (0.03) 28.18 (0.03) 28.12 (0.05) 28.12 (0.05) 28.30 (0.2) 28.12 (0.05) 28.18 28.18 (0.03) 28.12 (0.05)
Distance [pc] 35.49 (0.04) 35.49 (0.04) 35.56 (0.06) 35.56 (0.06) 35.34 (0.3) 35.56 (0.06) 34.10 (6) 35.49 35.49 (0.04) 35.56 (0.06)
Composition He He He
Proper motion (right ascension) [mas/yr] -114.5110524 (0.04) -114.5797936 (0.08) -114.511 (0.04) -114.5797936
Proper motion (declination) [mas/yr] -180.6437171 (0.04) -180.6090642 (0.09) -180.644 (0.04) -180.6090642
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 15.27
V magnitude
R magnitude 15.20
I magnitude
J magnitude 15.12 (0.01) 15.08 (0.04)
H magnitude 15.20 (0.1) 15.20 (0.1)
K magnitude 15.03 (0.1) 15.03 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 15.15 (0.002) 15.18 15.18 15.15 15.15 (0.003) 15.18
BP magnitude 15.18 (0.002) 15.14 15.14
RP magnitude 15.08 (0.002) 15.08 15.08
Pan g magnitude 15.17 (0.003) 15.17 (0.003)
Pan r magnitude 15.26 (0.003) 15.26 (0.003)
Pan i magnitude 15.42 (0.002) 15.42 (0.002)
Pan z magnitude 15.57 (0.003) 15.57 (0.003)
Pan y magnitude 15.69 (0.004) 15.69 (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.