All names: Gaia EDR3 1200713186258000256, SDSS J161821.44+184832.6, SDSS J161821.45+184832.6, Gaia DR2 1200713186258000256, GALEX J161821.4+184832, Gaia DR3 1200713186258000256
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Gaia DR2 | Stilism | sdss-wdms.org (29/04/2016) | Simbad | Kleinman et al. 2013 |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 18 21.44 (0.2) | 16 18 21.45 | 16 18 21.44 (0.3) | 16 18 21.45 | 16 18 21.45 (0.2) | 16 18 21.45 | |||
| Declination | 18 48 32.75 (0.2) | 18 48 32.65 | 18 48 32.74 (0.2) | 18 48 32.65 | 18 48 32.67 (0.2) | 18 48 32.64 | |||
| Spectral type | DA+M | DA+M | DA+M | ||||||
| Effective temperature | [K] | 17505.0 (1686) | 6302.0 (6) | ||||||
| log(g) | [cgs] | 7.50 (0.4) | 6.92 (0.3) | ||||||
| Mass | [M☉] | 0.38 (0.2) | |||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 1.47 (0.3) | 1.78 (0.4) | 1.47 (0.3) | |||||
| Distance | [pc] | 679.72 (141) | 561.73 (126) | 1137.00 (253) | 679.72 (141) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -4.189158704 (0.3) | -4.537570708 (0.5) | -4.189 (0.3) | |||||
| Proper motion (declination) | [mas/yr] | 4.888717056 (0.2) | 4.819719961 (0.5) | 4.889 (0.2) | |||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | WDMS | WDMS | |||||||
| B magnitude | |||||||||
| V magnitude | |||||||||
| R magnitude | |||||||||
| I magnitude | |||||||||
| J magnitude | |||||||||
| H magnitude | |||||||||
| K magnitude | |||||||||
| u magnitude | 20.42 (0.07) | 20.30 | 20.35 | 20.30 (0.07) | |||||
| g magnitude | 20.07 (0.02) | 19.98 | 19.96 | 19.98 (0.02) | |||||
| r magnitude | 19.98 (0.02) | 20.04 | 20.03 | 20.04 (0.02) | |||||
| i magnitude | 19.22 (0.02) | 19.26 | 19.24 | 19.26 (0.02) | |||||
| z magnitude | 18.50 (0.03) | 18.47 | 18.47 | 18.47 (0.03) | |||||
| G magnitude | 19.54 (0.04) | 19.57 | 19.54 (0.004) | ||||||
| BP magnitude | 20.09 (0.04) | 20.05 | |||||||
| RP magnitude | 18.76 (0.02) | 18.75 | |||||||
| Pan g magnitude | 20.03 (0.02) | ||||||||
| Pan r magnitude | 19.97 (0.02) | ||||||||
| Pan i magnitude | 19.22 (0.008) | ||||||||
| Pan z magnitude | 18.66 (0.009) | ||||||||
| Pan y magnitude | 18.34 (0.01) | ||||||||
| E(B-V) | 0.053 | ||||||||
* 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.