All names: NLTT 22664, USNO-B1.0 1025-00211918, WD 0946+127, SDSS J094857.89+123243.1, Gaia EDR3 613553056239392768, Gaia DR3 613553056239392768, SDSS J094857.88+123243.0, Gaia DR2 613553056239392768, LP 488-41, SDSS J094857.89+123243.0, J0948+1232, WDJ094857.93+123242.97, GALEX J094857.8+123243, [VV2006] J094857.8+123243, LSPM J0948+1232
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Kilic et al. 2025 | Caron et al. 2023 | Coutu et al. 2019 | Gaia DR2 | Stilism | 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 | 09 48 57.73 (0.1) | 09 48 57.89 | 09 48 57.93 | 09 48 57.73 (0.2) | 09 48 57.73 | 09 48 57.93 (0.1) | 09 48 57.73 | 09 48 57.89 | 09 48 57.94 | 09 48 57.89 | ||||||
| Declination | 12 32 43.49 (0.1) | 12 32 43.02 | 12 32 42.97 | 12 32 43.47 (0.2) | 12 32 43.49 | 12 32 42.97 (0.1) | 12 32 43.47 | 12 32 43.05 | 12 32 36.60 | 12 32 43.05 | ||||||
| Spectral type | DQ | DQ | DQ | DC: | DC | DQ: | DQ: | DQ | DQ | |||||||
| Effective temperature | [K] | 6877.0 (44) | 7092.0 (42) | 7218.0 (146) | 6856.0 (158) | 10082.0 (8) | 10082.0 (8) | |||||||||
| log(g) | [cgs] | 8.02 (0.02) | 8.11 (0.02) | 8.16 | 8.03 (0.04) | 8.65 (0.3) | 9.68 (0.4) | |||||||||
| Mass | [M☉] | 0.588 (0.02) | 0.644 (0.02) | 0.6749 | 0.592 (0.03) | |||||||||||
| log(Luminosity) | [L☉] | |||||||||||||||
| Cooling age | [Gyr] | 1.8300 | 1.9000 | |||||||||||||
| log(H/He) | ||||||||||||||||
| log(C/He) | -6.52 | -6.49 | -6.2938 (0.1) | |||||||||||||
| 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] | 12.24 (0.1) | 12.43 (0.2) | 12.43 | 12.43 (0.2) | 12.24 | 12.24 (0.1) | 12.43 (0.2) | ||||||||
| Distance | [pc] | 81.73 (1) | 80.45 (1) | 80.46 (1) | 80.46 (1) | 81.73 | 81.73 (1) | 80.46 (1) | ||||||||
| Composition | He | He | He | |||||||||||||
| Proper motion (right ascension) | [mas/yr] | -181.8894699 (0.2) | -181.6648726 (0.3) | -181.889 (0.1) | -181.6648726 | -178.1 | ||||||||||
| Proper motion (declination) | [mas/yr] | 32.49738472 (0.1) | 32.10459609 (0.3) | 32.497 (0.1) | 32.10459609 | 34.1 | ||||||||||
| Variability | ||||||||||||||||
| Magnetic | ||||||||||||||||
| Bd | [MG] | |||||||||||||||
| Infrared excess (disk) | ||||||||||||||||
| Binarity | ||||||||||||||||
| B magnitude | 17.80 | |||||||||||||||
| V magnitude | 18.53 | |||||||||||||||
| R magnitude | 18.30 | |||||||||||||||
| I magnitude | ||||||||||||||||
| J magnitude | 17.65 (0.03) | |||||||||||||||
| H magnitude | 17.64 (0.06) | |||||||||||||||
| K magnitude | 17.72 (0.1) | |||||||||||||||
| u magnitude | 18.68 (0.02) | 18.67 (0.02) | 18.68 (0.02) | 18.68 (0.02) | 18.62 (0.03) | 18.62 | 18.65 (0.03) | |||||||||
| g magnitude | 18.28 (0.007) | 18.29 (0.007) | 18.29 (0.007) | 18.27 (0.02) | 18.27 | 18.30 (0.02) | ||||||||||
| r magnitude | 18.15 (0.007) | 18.14 (0.007) | 18.14 (0.007) | 18.14 (0.02) | 18.13 | 18.15 (0.02) | ||||||||||
| i magnitude | 18.15 (0.009) | 18.15 (0.009) | 18.15 (0.009) | 18.12 (0.03) | 18.11 | 18.13 (0.03) | ||||||||||
| z magnitude | 18.27 (0.02) | 18.27 (0.02) | 18.27 (0.02) | 18.27 (0.03) | 18.26 | 18.27 (0.03) | ||||||||||
| G magnitude | 18.12 (0.03) | 18.15 | 18.12 | 18.12 (0.003) | 18.15 | |||||||||||
| BP magnitude | 18.31 (0.03) | 18.26 | 18.26 | |||||||||||||
| RP magnitude | 17.86 (0.02) | 17.79 | 17.79 | |||||||||||||
| Pan g magnitude | 18.28 (0.005) | 18.28 (0.005) | ||||||||||||||
| Pan r magnitude | 18.15 (0.008) | 18.15 (0.007) | ||||||||||||||
| Pan i magnitude | 18.16 (0.006) | 18.16 (0.006) | ||||||||||||||
| Pan z magnitude | 18.23 (0.008) | 18.23 (0.008) | ||||||||||||||
| Pan y magnitude | 18.33 (0.05) | 18.33 (0.05) | ||||||||||||||
| E(B-V) | 0.004 | |||||||||||||||
* 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.