2MASS J06443019+2731115

All names: LSPM J0644+2731, SDSS J064430.10+273111.1, 2MASS J06443019+2731115, WIRED J064430.09+273111.1, Gaia EDR3 3386162214851684864, SDSS J064430.09+273111.1, GALEX J064430.0+273112, Gaia DR3 3386162214851684864, PSO J101.1250+27.5196, USNO-B1.0 1175-00166661, J0644+2731, 06445+2731, PM J06445+2731, TIC 84443086, Gaia DR2 3386162214851684864, WDJ064430.17+273111.39

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 Blouin et al. 2019 MWDD H Gaia DR2 Stilism Limoges et al. 2015 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Kleinman et al. 2013 Vincent et al. 2023
Right ascension 06 44 30.00 (0.06) 06 44 30.10 06 44 30.00 (0.09) 06 44 30.00 (0.09) 06 44 30.00 06 44 30.17 (0.06) 06 44 30.00 06 44 30.10
Declination 27 31 10.67 (0.06) 27 31 11.11 27 31 10.70 (0.08) 27 31 10.70 (0.08) 27 31 10.67 27 31 11.39 (0.06) 27 31 10.70 27 31 11.13
Spectral type DA DA DA DA DA DA DA DA DA DA DA DA:(BAD_SPEC) DA
Effective temperature [K] 6961.0 (30) 6833.0 (119) 6975.0 (26) 6961.0 (30) 6898.1 (123) 6890.0 (60) 6938.0 7020.0 (119) 7014.0 (69) 6988.0 (40)
log(g) [cgs] 8.38 (0.008) 8.33 (0.04) 8.39 (0.007) 8.39 (0.007) 8.37 (0.04) 8.37 (0.02) 8.38 8.69 (0.1) 8.39 (0.02) 8.26 (0.1)
Mass [M] 0.838 (0.006) 0.801 (0.03) 0.843 (0.006) 0.841 (0.007) 0.831 (0.01) 0.837 1.04 (0.08) 0.841 (0.01)
log(Luminosity) [L] -3.90
Cooling age [Gyr] 3.5700 3.4160 (0.1) 3.3970
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] 25.92 (0.07) 25.92 (0.07) 26.01 (0.09) 26.01 (0.09) 26.01 (0.09) 26.01 (0.09) 25.92 25.92 (0.07) 26.01 (0.09)
Distance [pc] 38.58 (0.1) 38.58 (0.1) 38.45 (0.1) 38.44 (0.1) 38.44 (0.1) 38.44 (0.1) 30.70 (0.8) 38.58 38.58 (0.1) 38.44 (0.1)
Composition H H H H H H
Proper motion (right ascension) [mas/yr] -146.3614344 (0.08) -146.0806901 (0.2) -146.0 -146.361 (0.08) -146.081
Proper motion (declination) [mas/yr] -44.68026951 (0.06) -44.68170729 (0.1) -46.0 -44.68 (0.06) -44.682
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.20
V magnitude
R magnitude 17.20
I magnitude
J magnitude 16.27 (0.01) 16.23 (0.1) 16.23 16.23 (0.1)
H magnitude 16.75 (0.4) 16.75 (0.4) 16.75 16.75 (0.07)
K magnitude 16.38 (0.03) 16.38
u magnitude 17.72 (0.01) 17.71 (0.01) 17.72 17.72 (0.01) 17.72 (0.01) 17.73 (0.02)
g magnitude 17.16 (0.004) 17.15 17.15 (0.004) 17.16 (0.004) 17.14 (0.01)
r magnitude 16.95 (0.004) 16.95 16.98 (0.002) 16.95 (0.004) 16.95 (0.01)
i magnitude 16.91 (0.005) 16.91 16.94 (0.004) 16.91 (0.005) 16.91 (0.01)
z magnitude 16.98 (0.01) 16.97 16.96 (0.004) 16.98 (0.01) 16.98 (0.02)
G magnitude 16.94 (0.007) 16.96 16.96 16.94 16.94 (0.003) 16.96
BP magnitude 17.14 (0.007) 17.13 17.13
RP magnitude 16.59 (0.01) 16.60 16.60
Pan g magnitude 17.15 (0.004) 17.15 (0.004) 17.15 (0.004)
Pan r magnitude 16.98 (0.003) 16.98 (0.002) 16.98 (0.002)
Pan i magnitude 16.94 (0.003) 16.94 (0.004) 16.94 (0.004)
Pan z magnitude 16.96 (0.004) 16.96 (0.005) 16.96 (0.005)
Pan y magnitude 17.03 (0.01) 17.03 (0.01) 17.03 (0.01)
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.