All names: WDJ20304.11+072943.69, USNO-B1.0 0974-00679752, PM J20300+0729, WD 2027+073, 2MASS J20300411+0729436, WDJ203004.11+072943.70, LSPM J2030+0729, LP 575-16, NLTT 49350, Gaia DR2 1748922296525519872
| Parameter | Unit | Gaia DR2 | Simbad | Gentile Fusillo et al. 2018 |
|---|---|---|---|---|
| Right ascension | 20 30 04.29 | 20 30 04.11 (0.05) | 20 30 04.29 | |
| Declination | 07 29 40.82 | 07 29 43.70 (0.04) | 07 29 40.82 | |
| Spectral type | DC5 | |||
| Effective temperature | [K] | |||
| log(g) | [cgs] | |||
| Mass | [M☉] | |||
| log(Luminosity) | [L☉] | |||
| Cooling age | [Gyr] | |||
| log(H/He) | ||||
| log(C/He) | ||||
| log(Ca/He) | ||||
| log(Ca/H) | ||||
| Parallax | [mas] | 24.17 (0.05) | 24.17 (0.05) | 24.17 (0.05) |
| Distance | [pc] | 41.38 (0.09) | 41.38 (0.09) | 41.38 (0.09) |
| Composition | ||||
| Proper motion (right ascension) | [mas/yr] | 178.0776855 (0.1) | 178.078 (0.1) | 178.0776855 |
| Proper motion (declination) | [mas/yr] | -185.9178928 (0.08) | -185.918 (0.08) | -185.9178928 |
| Variability | ||||
| Magnetic | ||||
| Bd | [MG] | |||
| Infrared excess (disk) | ||||
| Binarity | ||||
| B magnitude | 16.30 | |||
| V magnitude | ||||
| R magnitude | 15.80 | |||
| I magnitude | ||||
| J magnitude | 15.66 (0.06) | |||
| H magnitude | 16.08 (0.2) | |||
| K magnitude | 15.61 (0.2) | |||
| u magnitude | ||||
| g magnitude | ||||
| r magnitude | ||||
| i magnitude | ||||
| z magnitude | ||||
| G magnitude | 16.05 | 16.05 (0.0006) | 16.05 | |
| BP magnitude | 16.11 | 16.11 | ||
| RP magnitude | 15.85 | 15.85 | ||
| Pan g magnitude | ||||
| Pan r magnitude | ||||
| Pan i magnitude | ||||
| Pan z magnitude | ||||
| Pan y magnitude |
* Constant surface field
Spectra without link are available upon request
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.