All names: J1017+0838, J1018+0838, SDSS J101800.00+083820.3, TIC 350019983, LP 489-64, WD 1015+088, 2MASS J10180002+0838206, LSPM J1018+0838, WDJ101800.04+083820.53, GALEX J101759.9+083819, Gaia DR2 3875789001991057536, SDSS J101800.01+083820.3, Gaia DR3 3875789001991057536, NLTT 23936, Gaia EDR3 3875789001991057536, SDSS J101800.00+083820.2, USNO-B1.0 0986-00199468
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | Koester et al. 2006 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | Eisenstein et al. 2006 | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 10 17 59.81 (0.06) | 10 18 00.01 | 10 18 00.04 | 10 17 59.82 (0.08) | 10 17 59.81 | 10 18 00.04 (0.06) | 10 17 59.82 | 10 18 00.01 | 10 18 00.24 | 10 18 00.00 | |||||||
| Declination | 08 38 18.67 (0.06) | 08 38 20.27 | 08 38 20.53 | 08 38 18.73 (0.08) | 08 38 18.67 | 08 38 20.53 (0.06) | 08 38 18.73 | 08 38 20.28 | 08 38 16.08 | 08 38 20.28 | |||||||
| Spectral type | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | DQ | ||||||
| Effective temperature | [K] | 7539.0 (38) | 7465.0 (25) | 7576.0 (164) | 7784.0 | 7434.0 (50) | 10084.0 (12) | 10084.0 (14) | |||||||||
| log(g) | [cgs] | 7.92 (0.008) | 7.89 (0.007) | 7.93 | 8.00 (0) | 7.88 (0.01) | 8.80 (0.2) | 9.64 (0.3) | |||||||||
| Mass | [M☉] | 0.527 (0.007) | 0.514 (0.006) | 0.5343 | 0.503 (0.01) | ||||||||||||
| log(Luminosity) | [L☉] | ||||||||||||||||
| Cooling age | [Gyr] | 1.2100 | 1.1700 | ||||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | -6.02 | -6.15 | -6.0262 (0.06) | -5.85 (0.01) | |||||||||||||
| 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] | 22.88 (0.06) | 22.82 (0.09) | 22.82 | 22.82 (0.09) | 22.88 | 22.88 (0.06) | 22.82 (0.09) | |||||||||
| Distance | [pc] | 43.71 (0.1) | 43.82 (0.2) | 43.81 (0.2) | 43.81 (0.2) | 43.71 | 43.71 (0.1) | 43.81 (0.2) | |||||||||
| Composition | He | He | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -210.3232111 (0.07) | -210.4634518 (0.2) | -210.323 (0.07) | -210.463 | -204.8 | |||||||||||
| Proper motion (declination) | [mas/yr] | -116.3700681 (0.07) | -116.5532522 (0.1) | -116.37 (0.07) | -116.553 | -115.3 | |||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | ||||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | |||||||||||||||||
| B magnitude | 16.40 | ||||||||||||||||
| V magnitude | |||||||||||||||||
| R magnitude | 16.10 | ||||||||||||||||
| I magnitude | |||||||||||||||||
| J magnitude | 16.00 (0.009) | 16.00 (0.009) | |||||||||||||||
| H magnitude | 15.90 (0.01) | 15.90 (0.01) | |||||||||||||||
| K magnitude | 15.93 (0.02) | 15.93 (0.02) | |||||||||||||||
| u magnitude | 16.80 (0.007) | 16.79 (0.007) | 16.80 (0.007) | 16.80 (0.007) | 16.79 (0.03) | 16.79 | 16.74 (0.03) | ||||||||||
| g magnitude | 16.42 (0.004) | 16.42 (0.004) | 16.42 (0.004) | 16.43 (0.03) | 16.43 | 16.39 (0.02) | |||||||||||
| r magnitude | 16.37 (0.004) | 16.37 (0.004) | 16.37 (0.004) | 16.43 (0.02) | 16.43 | 16.39 (0.02) | |||||||||||
| i magnitude | 16.43 (0.005) | 16.43 (0.005) | 16.43 (0.005) | 16.48 (0.01) | 16.48 | 16.45 (0.01) | |||||||||||
| z magnitude | 16.56 (0.009) | 16.56 (0.009) | 16.56 (0.009) | 16.58 (0.02) | 16.58 | 16.55 (0.02) | |||||||||||
| G magnitude | 16.33 (0.005) | 16.35 | 16.33 | 16.33 (0.003) | 16.35 | ||||||||||||
| BP magnitude | 16.44 (0.005) | 16.44 | 16.44 | ||||||||||||||
| RP magnitude | 16.10 (0.005) | 16.11 | 16.11 | ||||||||||||||
| Pan g magnitude | 16.42 (0.004) | 16.42 (0.005) | |||||||||||||||
| Pan r magnitude | 16.38 (0.005) | 16.38 (0.005) | |||||||||||||||
| Pan i magnitude | 16.45 (0.004) | 16.45 (0.004) | |||||||||||||||
| Pan z magnitude | 16.55 (0.004) | 16.55 (0.003) | |||||||||||||||
| Pan y magnitude | 16.63 (0.005) | 16.63 (0.005) | |||||||||||||||
| 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.