All names: NLTT 31473, DENIS J124024.3-231741, 2MASS J12402426-2317424, SDSS J124024.15-231743.9, WISEA J124023.58-231751.9, LP 853-15, WDJ124024.18-231743.71, PSO J190.0978-23.2982, LHS 339, WD 1237-230, SDSS J124024.16-231744.0, J1240-2317, Gaia DR3 3501922067493606272, Gaia DR2 3501922067493606272, Gaia EDR3 3501922067493606272, TIC 286831934
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | Kilic et al. 2025 | Caron et al. 2023 | Kilic et al. 2020 | Blouin et al. 2019 | Gaia DR2 | Subasavage et al. 2017 | Stilism | Kawka & Vennes 2012 | Gianninas et al. 2011 | Subasavage et al. 2007 | Vincent et al. 2024 | Simbad | Gentile Fusillo et al. 2018 | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 12 40 23.29 (0.04) | 12 40 23.32 (0.06) | 12 40 24.18 | 12 40 24.18 | 12 40 23.29 | 12 40 24.18 (0.04) | 12 40 23.32 | 12 40 26.62 | |||||||||
| Declination | -23 17 56.45 (0.03) | -23 17 56.05 (0.04) | -23 17 04.07 | -23 17 43.80 | -23 17 56.45 | -23 17 43.71 (0.03) | -23 17 56.05 | -23 17 03.84 | |||||||||
| Spectral type | DA | DA | DA | DA | DA | DA | DA8.5 | DA | DA8.8 | DA | |||||||
| Effective temperature | [K] | 5525.0 (17) | 5509.0 (19) | 5500.0 (16) | 5575.0 (35) | 5670.0 (90) | 5680.0 (150) | 5760.0 (251) | 5841.0 (173) | 5611.0 (19) | |||||||
| log(g) | [cgs] | 7.24 (0.06) | 7.07 (0.007) | 7.04 (0.009) | 7.12 (0.02) | 7.29 (0.1) | 8.00 (0.2) | 7.83 (0.6) | 7.11 (0.009) | ||||||||
| Mass | [M☉] | 0.295 (0.05) | 0.2 (0.001) | 0.192 (0.003) | 0.212 (0.006) | 0.26 (0.05) | 0.59 (0.1) | 0.49 (0.3) | 0.211 (0.004) | ||||||||
| log(Luminosity) | [L☉] | -3.46 (0.08) | |||||||||||||||
| Cooling age | [Gyr] | 0.9700 | 1.1270 (0.02) | 1.2100 (0.1) | 2.9000 | ||||||||||||
| log(H/He) | |||||||||||||||||
| log(C/He) | |||||||||||||||||
| log(Ca/He) | |||||||||||||||||
| log(Ca/H) | |||||||||||||||||
| log(Li/H) | |||||||||||||||||
| log(Be/H) | |||||||||||||||||
| log(B/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(Cl/H) | |||||||||||||||||
| log(K/H) | |||||||||||||||||
| log(Sc/H) | |||||||||||||||||
| log(Ti/H) | |||||||||||||||||
| log(V/H) | |||||||||||||||||
| log(Cr/H) | |||||||||||||||||
| log(Mn/H) | |||||||||||||||||
| log(Fe/H) | |||||||||||||||||
| log(Co/H) | |||||||||||||||||
| log(Ni/H) | |||||||||||||||||
| log(Cu/H) | |||||||||||||||||
| log(Sr/H) | |||||||||||||||||
| Parallax | [mas] | 23.87 (0.05) | 23.85 (0.07) | 23.85 (0.07) | 23.85 (0.07) | 25.37 (2) | 23.87 | 23.87 (0.05) | 23.85 (0.07) | ||||||||
| Distance | [pc] | 41.89 (0.09) | 41.93 (0.1) | 41.93 (0.1) | 41.93 (0.1) | 39.42 (3) | 26.00 (5) | 31.00 | 26.90 | 41.89 | 41.89 (0.09) | 41.93 (0.1) | |||||
| Composition | H | H | H | H | H | H | |||||||||||
| Proper motion (right ascension) | [mas/yr] | -760.6353846 (0.07) | -760.7524045 (0.1) | -760.635 (0.07) | -760.7524045 | ||||||||||||
| Proper motion (declination) | [mas/yr] | -796.4882599 (0.04) | -796.4800115 (0.08) | -796.488 (0.04) | -796.4800115 | ||||||||||||
| Variability | |||||||||||||||||
| Magnetic | |||||||||||||||||
| Bd | [MG] | 0.001 (0.002) | |||||||||||||||
| Infrared excess (disk) | |||||||||||||||||
| Binarity | DDu | ||||||||||||||||
| B magnitude | 17.16 | 16.50 | |||||||||||||||
| V magnitude | 16.54 | 16.53 (0.02) | |||||||||||||||
| R magnitude | 16.13 | 16.14 (0.01) | |||||||||||||||
| I magnitude | 15.72 | 15.73 (0.02) | |||||||||||||||
| J magnitude | 15.35 (0.05) | 15.35 (0.05) | 15.35 (0.05) | 15.35 (0.05) | 15.35 (0.05) | ||||||||||||
| H magnitude | 15.08 (0.08) | 15.08 (0.08) | 15.08 (0.08) | 15.08 (0.08) | 15.08 (0.08) | ||||||||||||
| K magnitude | 14.94 (0.1) | 14.94 (0.1) | 14.94 (0.1) | 14.94 (0.1) | 14.94 (0.1) | ||||||||||||
| u magnitude | 17.92 (0.01) | 17.92 (0.01) | 17.92 (0.01) | ||||||||||||||
| g magnitude | 16.76 (0.007) | 16.81 (0.004) | |||||||||||||||
| r magnitude | 16.35 (0.0009) | 16.34 (0.004) | |||||||||||||||
| i magnitude | 16.18 (0.005) | 16.15 (0.004) | |||||||||||||||
| z magnitude | 16.12 (0.009) | 16.09 (0.007) | |||||||||||||||
| G magnitude | 16.35 (0.004) | 16.36 | 16.35 | 16.35 (0.003) | 16.36 | ||||||||||||
| BP magnitude | 16.69 (0.004) | 16.71 | 16.71 | ||||||||||||||
| RP magnitude | 15.82 (0.003) | 15.83 | 15.83 | ||||||||||||||
| Pan g magnitude | 16.75 (0.005) | 16.77 (0.02) | 16.76 (0.007) | ||||||||||||||
| Pan r magnitude | 16.34 (0.004) | 16.34 (0.004) | 16.35 (0.001) | ||||||||||||||
| Pan i magnitude | 16.16 (0.002) | 16.16 (0.01) | 16.18 (0.005) | ||||||||||||||
| Pan z magnitude | 16.14 (0.004) | 16.11 (0.009) | 16.12 (0.009) | ||||||||||||||
| Pan y magnitude | 16.10 (0.006) | 16.08 (0.01) | 16.11 (0.003) | ||||||||||||||
| 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.