All names: GSC2U J231518.5-020942, J2315-0209, Gaia DR3 2638553754605793408, PLX 5622.01, WD 2312-024, G157-35, Gaia DR2 2638553754605793408, EGGR 554, uvby98 980157035, [SRH2004] A 8, TIC 301080587, NLTT 56245, WD 2312-02, LHS 3917, G 157-35, PSO J348.8301-02.1607, GEN# +9.80157035, 2MASS J23151875-0209407, USNO 360, USNO-B1.0 0878-00870898, Gaia EDR3 2638553754605793408, WDJ231518.81-020940.60, SDSS J231519.15-020939.1, SDSS J231519.15-020939.0
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | O'Brien et al. 2024 | Caron et al. 2023 | Coutu et al. 2019 | Blouin et al. 2019 | Gaia DR2 | Stilism | Dufour et al. 2007 | Koester et al. 2005 | Bergeron et al. 2001 | Bergeron et al. 1997 | Sion et al. 1990 | Liebert et al. 1987 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 23 15 19.44 (0.04) | 23 15 18.81 | 23 15 19.42 (0.06) | 23 15 19.44 | 23 15 18.81 (0.04) | 23 15 19.42 | 23 15 17.30 | |||||||||||||
| Declination | -02 09 37.76 (0.04) | -02 09 40.60 | -02 09 37.84 (0.05) | -02 09 37.76 | -02 09 40.60 (0.04) | -02 09 37.84 | -02 09 55.80 | |||||||||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ8 | DZ8 | |||||||
| Effective temperature | [K] | 6317.0 (30) | 6634.0 (58) | 6337.0 (34) | 6389.0 (60) | 5670.0 (140) | 6220.0 (190) | 6000.0 | 6840.0 (160) | 6880.0 (160) | 5800.0 | 6000.0 | 6537.0 (41) | |||||||
| log(g) | [cgs] | 8.07 (0.008) | 8.15 (0.03) | 8.08 (0.008) | 8.10 | 7.89 (0.07) | 8.19 (0.3) | 8.00 | 8.41 (0.2) | 8.44 (0.2) | 8.17 (0.01) | |||||||||
| Mass | [M☉] | 0.616 (0.007) | 0.665 (0.02) | 0.621 (0.007) | 0.6371 | 0.509 (0.04) | 0.69 (0.2) | 0.84 (0.1) | 0.86 (0.1) | 0.678 (0.009) | ||||||||||
| log(Luminosity) | [L☉] | -3.75 (0.1) | -3.76 (0.1) | |||||||||||||||||
| Cooling age | [Gyr] | 2.4200 | 2.4800 | 2.6550 (0.5) | 3.6200 (0.8) | 4.5700 (1) | ||||||||||||||
| log(H/He) | -3.0 | -3.0 | <-3.197 | -4.9 (0.3) | -3.0 | |||||||||||||||
| log(C/He) | -4.0 | |||||||||||||||||||
| log(Ca/He) | -9.92 | -9.88 | -9.7966 (0.03) | -10.13 | -10.55 (0.05) | -10.5 | -10.8 | |||||||||||||
| log(Ca/H) | ||||||||||||||||||||
| log(N/He) | ||||||||||||||||||||
| log(O/He) | ||||||||||||||||||||
| log(Na/He) | ||||||||||||||||||||
| log(Mg/He) | -10.8 | |||||||||||||||||||
| 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) | -9 | |||||||||||||||||||
| log(Co/He) | ||||||||||||||||||||
| log(Ni/He) | ||||||||||||||||||||
| log(Cu/He) | ||||||||||||||||||||
| log(Zn/He) | ||||||||||||||||||||
| log(Ga/He) | ||||||||||||||||||||
| log(Ge/He) | ||||||||||||||||||||
| log(Sr/He) | ||||||||||||||||||||
| Parallax | [mas] | 33.64 (0.05) | 33.64 (0.05) | 33.63 (0.06) | 33.63 | 33.63 (0.06) | 33.63 (0.06) | 37.50 (6) | 37.50 (6) | 33.64 | 33.64 (0.05) | 33.63 (0.06) | 39.10 | |||||||
| Distance | [pc] | 29.72 (0.04) | 29.73 (0.04) | 29.74 (0.05) | 29.73 (0.06) | 29.73 (0.06) | 29.73 (0.06) | 26.67 (4) | 26.67 (4) | 29.72 | 29.72 (0.04) | 29.73 (0.06) | 25.58 | |||||||
| Composition | He | He | He | He | He | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | 591.763 (0.05) | 591.8784847 (0.1) | 591.763 (0.05) | 591.8784847 | |||||||||||||||
| Proper motion (declination) | [mas/yr] | 177.818 (0.05) | 177.8987212 (0.09) | 177.818 (0.06) | 177.8987212 | |||||||||||||||
| Variability | ||||||||||||||||||||
| Magnetic | ||||||||||||||||||||
| Bd | [MG] | |||||||||||||||||||
| Infrared excess (disk) | ||||||||||||||||||||
| Binarity | ||||||||||||||||||||
| B magnitude | 16.82 | 16.82 | 16.80 | |||||||||||||||||
| V magnitude | 16.31 | 16.31 | 16.29 | |||||||||||||||||
| R magnitude | 16.05 | 16.05 | ||||||||||||||||||
| I magnitude | 15.82 | 15.82 | ||||||||||||||||||
| J magnitude | 15.63 (0.007) | 15.49 (0.06) | 15.70 | 15.70 | 15.49 (0.06) | |||||||||||||||
| H magnitude | 15.54 (0.01) | 15.75 (0.2) | 15.53 | 15.53 | 15.75 (0.2) | |||||||||||||||
| K magnitude | 15.49 (0.03) | 15.58 | 15.58 | |||||||||||||||||
| u magnitude | 17.21 (0.03) | 17.21 (0.01) | 17.21 (0.01) | |||||||||||||||||
| g magnitude | 16.43 (0.004) | 16.42 (0.004) | ||||||||||||||||||
| r magnitude | 16.23 (0.002) | 16.23 (0.005) | ||||||||||||||||||
| i magnitude | 16.22 (0.007) | 16.19 (0.005) | ||||||||||||||||||
| z magnitude | 16.25 (0.006) | 16.23 (0.008) | ||||||||||||||||||
| G magnitude | 16.23 (0.003) | 16.24 | 16.23 | 16.23 (0.003) | 16.24 | |||||||||||||||
| BP magnitude | 16.44 (0.005) | 16.45 | 16.45 | |||||||||||||||||
| RP magnitude | 15.87 (0.005) | 15.88 | 15.88 | |||||||||||||||||
| Pan g magnitude | 16.43 (0.006) | 16.43 (0.007) | 16.43 (0.004) | |||||||||||||||||
| Pan r magnitude | 16.22 (0.01) | 16.22 (0.01) | 16.23 (0.002) | |||||||||||||||||
| Pan i magnitude | 16.20 (0.004) | 16.20 (0.003) | 16.22 (0.008) | |||||||||||||||||
| Pan z magnitude | 16.27 (0.002) | 16.27 (0.002) | 16.25 (0.006) | |||||||||||||||||
| Pan y magnitude | 16.30 (0.006) | 16.30 (0.005) | 16.29 (0.02) | |||||||||||||||||
| E(B-V) | 0.001 | |||||||||||||||||||
* Constant surface field
Spectra without link are available upon request
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.