All names: [SPB96] 1935, PLX 4440, LSPM J1900+7039, NLTT 47348, USNO-B1.0 1606-00125381, 2MASS J19001024+7039512, AC +70 8247-0, AC +70 8247, CSI+70-19007, EGGR 129, G 260-15, GEN# +9.80260015, GJ 742, LAWD 73, LFT 1446, LHS 3424, LTT 15585, UBV 16196, USNO 350, WD 1900+706, WD 1900+705, WD 1900+70, uvby98 980260015, PLX 4440.00
| Parameter | Unit | Holberg et al. 2016 | Ferrario et al. 2015 | Simbad | |
|---|---|---|---|---|---|
| Right ascension | 19 00 10.25 | ||||
| Declination | 70 39 51.19 | ||||
| Spectral type | DAP4.2 | DA | DAP4.5 | ||
| Effective temperature | [K] | 11517.0 | 16000.0 | ||
| log(g) | [cgs] | 8.46 | |||
| Mass | [M☉] | 0.9 | 0.95 | ||
| log(Luminosity) | [L☉] | ||||
| Cooling age | [Gyr] | 0.8600 | |||
| log(H/He) | |||||
| log(C/He) | |||||
| log(Ca/He) | |||||
| 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(Ca/H) | |||||
| log(Sc/H) | |||||
| log(Ti/H) | |||||
| log(Cr/H) | |||||
| log(Mn/H) | |||||
| log(Fe/H) | |||||
| log(Ni/H) | |||||
| Parallax | [mas] | 77.00 | 76.00 | ||
| Distance | [pc] | 12.99 | 13.16 | ||
| Composition | H | ||||
| Proper motion (right ascension) | [mas/yr] | 92 | |||
| Proper motion (declination) | [mas/yr] | 498.0 | |||
| Variability | |||||
| Magnetic | yes | yes | |||
| Db | [MG] | 100 | 320 | ||
| Infrared excess (disk) | |||||
| Binarity | |||||
| B magnitude | 13.24 | ||||
| V magnitude | 13.23 | 13.19 | |||
| R magnitude | 13.50 | ||||
| I magnitude | 13.60 | ||||
| J magnitude | 13.33 | ||||
| H magnitude | 13.44 | ||||
| K magnitude | 13.42 | ||||
| u magnitude | |||||
| g magnitude | |||||
| r magnitude | |||||
| i magnitude | |||||
| z magnitude | |||||
* Constant surface field
The Montreal White Dwarf Database is produced and maintained by Prof. Patrick Dufour at Université de Montréal. Please send database updates, corrections, suggestions or bug reports to dufourpa@astro.umontreal.ca.