* alf CMa B

All names: WDS J06451-1643BC, Gaia DR3 2947050466531873024, 1E 064255-1639.4, 2E 0642.9-1638, WDJ064509.30-164300.72, 1RXS J064509.3-164241, 2RE J0645-164, 2E 1730, UBV 6710, RX J0645.1-1642, Gaia EDR3 2947050466531873024, 2EUVE J0645-16.7, CCDM J06451-1643BC, NAME Sirius C, H 0643-16, CNS5 1675, WD 0643-16, GEN# +1.00048915B, NAME Sirius B, WD 0642-163, GJ 244 B, 2RE J064509-164243, Sirius B, * alf CMa B, WD 0642-16, CSI-16 1591 3, ADS 5423 B, 1ES 0642-16.6, NAME Sirius BC, RE J0645-16, ** AGC 1BC, 8pc 379.21B, 1E 064255-1639.3, Gaia DR2 2947050466531873024, [BM83] X0642-166, BD-16 1591B, HD 48915B, EUVE J0645-16.7, IDS 06408-1635 B, Zkh 92, 2RXF J064508.6-164240, RE J064509-164243, EGGR 49, RE J0645-164, WD 0642-166

Parameter Unit Gaia EDR3 O'Brien et al. 2024 Gaia DR2 Bedard et al. 2017 Tremblay et al. 2017 Stilism Holberg et al. 2016 Sion et al. 2014 Giammichele et al. 2012 Gianninas et al. 2011 Holberg et al. 2008 Simbad Gentile Fusillo et al. 2018 White Dwarf Catalog (McCook & Sion 1999)
Right ascension 06 45 08.79 (0.2) 06 45 08.81 (0.3) 06 45 09.12 06 45 09.30 (0.2) 06 45 08.81 06 45 11.09
Declination -16 43 15.36 (0.2) -16 43 14.90 (0.3) -16 42 46.80 -16 43 00.72 (0.2) -16 43 14.90 -16 42 05.40
Spectral type DA DA DA DA DA2 DA DA DA DA1.9 DA2
Effective temperature [K] 26083.0 (378) 25970.0 (380) 25193.0 (37) 25967.0 25967.0 (378) 25970.0 (378)
log(g) [cgs] 8.61 (0.04) 8.57 (0.04) 8.56 (0.01) 8.57 (0.04) 8.57 (0.04)
Mass [M] 0.94 (0.1) 0.97 (0.01) 0.98 (0.03) 0.98 (0.03)
log(Luminosity) [L] -1.53
Cooling age [Gyr] 0.1100 0.1000
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] 374.49 (0.2) 374.49 (0.2) 376.68 (0.5) 380.11 (1) 380.02 (1) 379.21 (2) 379.83 (1) 374.49 (0.2) 376.68 (0.5) 379.00
Distance [pc] 2.67 (0.002) 2.67 (0.002) 2.65 (0.003) 2.64 (0.01) 2.63 (0.009) 2.63 (0.01) 2.63 2.64 (0.1) 3.00 2.63 2.67 (0.002) 2.65 (0.003) 2.64
Composition H H H H
Proper motion (right ascension) [mas/yr] -461.5705055 (0.3) -459.6790835 (0.5) -461.571 (0.3) -459.6790835
Proper motion (declination) [mas/yr] -914.5196209 (0.3) -915.0229458 (0.5) -914.52 (0.3) -915.0229458
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity WDMS WDMS yes
B magnitude 8.41
V magnitude 8.44 (0.06) 8.44 8.39 8.44
R magnitude
I magnitude
J magnitude
H magnitude
K magnitude
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 8.52 (0.04) 8.47 8.52 (0.003) 8.47
BP magnitude 8.12 (0.04) 8.22 8.22
RP magnitude 8.40 (0.04) 8.48 8.48
Pan g magnitude
Pan r magnitude
Pan i magnitude
Pan z magnitude
Pan y magnitude
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.