All names: WD 1216+006, Gaia DR3 3698477839885075200, SDSS J121837.12+002304.0, SDSS J121837.12+002303.8, SDSS J121837.12+002303.7, J1218+0023, Gaia DR2 3698477839885075200, Gaia EDR3 3698477839885075200
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Blouin 2020 | Coutu et al. 2019 | Gaia DR2 | Hollands et al. 2017 | Stilism | Dufour et al. 2007 | Simbad | White Dwarf Catalog (McCook & Sion 1999) | Kleinman et al. 2013 | Vincent et al. 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 18 37.06 (0.3) | 12 18 37.12 | 12 18 37.12 | 12 18 37.06 (0.4) | 12 18 37.12 (0.3) | 12 18 36.72 | 12 18 37.12 | |||||||
| Declination | 00 23 04.18 (0.2) | 00 23 03.80 | 00 23 03.87 | 00 23 04.17 (0.2) | 00 23 03.86 (0.2) | 00 22 56.64 | 00 23 03.80 | |||||||
| Spectral type | DZ | DZ | DZ | DZ | DZ | DZ | DZ | DZ | ||||||
| Effective temperature | [K] | 6500.0 (188) | 6456.0 (77) | 6100.0 (90) | 6090.0 (100) | 6307.0 (11) | ||||||||
| log(g) | [cgs] | 8.31 (0.07) | 8.31 | 8.00 | 10.00 (0.003) | |||||||||
| Mass | [M☉] | 0.776 (0.05) | 0.7694 | |||||||||||
| log(Luminosity) | [L☉] | |||||||||||||
| Cooling age | [Gyr] | 3.7200 | 3.1000 | |||||||||||
| log(H/He) | <-3.0893 | <-4.0 | ||||||||||||
| log(C/He) | ||||||||||||||
| log(Ca/He) | -9.2 (0.2) | -9.5065 (0.1) | -9.61 | -9.92 (0.1) | ||||||||||
| log(Ca/H) | ||||||||||||||
| log(N/He) | ||||||||||||||
| log(O/He) | ||||||||||||||
| log(Na/He) | ||||||||||||||
| log(Mg/He) | -7.8 (0.2) | -9.2 | ||||||||||||
| 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) | -8.5 (0.3) | -8.9 | ||||||||||||
| log(Co/He) | ||||||||||||||
| log(Ni/He) | ||||||||||||||
| log(Cu/He) | ||||||||||||||
| log(Zn/He) | ||||||||||||||
| log(Ga/He) | ||||||||||||||
| log(Ge/He) | ||||||||||||||
| log(Sr/He) | ||||||||||||||
| Parallax | [mas] | 8.60 (0.3) | 8.90 | 8.90 (0.4) | 8.60 (0.3) | |||||||||
| Distance | [pc] | 116.27 (4) | 112.42 (6) | 112.34 (5) | 112.34 (5) | 119.00 (16) | 122.00 | 116.27 (4) | ||||||
| Composition | He | He | He | He | ||||||||||
| Proper motion (right ascension) | [mas/yr] | -58.49170625 (0.4) | -57.81084369 (1) | -58.492 (0.4) | ||||||||||
| Proper motion (declination) | [mas/yr] | 20.0006293 (0.2) | 19.52071961 (0.6) | 20.001 (0.2) | ||||||||||
| Variability | ||||||||||||||
| Magnetic | ||||||||||||||
| Bd | [MG] | |||||||||||||
| Infrared excess (disk) | ||||||||||||||
| Binarity | ||||||||||||||
| B magnitude | ||||||||||||||
| V magnitude | ||||||||||||||
| R magnitude | ||||||||||||||
| I magnitude | ||||||||||||||
| J magnitude | ||||||||||||||
| H magnitude | ||||||||||||||
| K magnitude | ||||||||||||||
| u magnitude | 20.43 (0.04) | 20.42 (0.04) | 20.42 (0.04) | 20.43 (0.04) | 20.45 | 20.44 (0.05) | ||||||||
| g magnitude | 19.51 (0.01) | 19.52 (0.02) | 19.52 (0.02) | 19.51 (0.01) | 19.54 | 19.52 (0.02) | ||||||||
| r magnitude | 19.33 (0.01) | 19.35 (0.02) | 19.35 (0.02) | 19.33 (0.01) | 19.36 | 19.35 (0.02) | ||||||||
| i magnitude | 19.30 (0.02) | 19.32 (0.02) | 19.32 (0.02) | 19.30 (0.01) | 19.33 | 19.32 (0.02) | ||||||||
| z magnitude | 19.46 (0.06) | 19.46 (0.06) | 19.46 (0.06) | 19.46 (0.06) | 19.48 | 19.47 (0.07) | ||||||||
| G magnitude | 19.34 (0.04) | 19.38 | 19.34 (0.004) | |||||||||||
| BP magnitude | 19.58 (0.04) | 19.46 | ||||||||||||
| RP magnitude | 19.08 (0.05) | 18.98 | ||||||||||||
| Pan g magnitude | 19.46 (0.01) | |||||||||||||
| Pan r magnitude | 19.33 (0.01) | |||||||||||||
| Pan i magnitude | 19.36 (0.01) | |||||||||||||
| Pan z magnitude | 19.47 (0.02) | |||||||||||||
| Pan y magnitude | 19.50 (0.04) | |||||||||||||
| E(B-V) | 0.006 | |||||||||||||
* 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.