All names: PLX 4641.01, uvby98 -004214462 V, GEN# -0.04214462, WISEA J194740.59-420026.9, SBC9 1171, WISE J194740.53-420026.7, SBC7 764, 1SWASP J194740.52-420026.3, TD1 31186, Gaia DR2 6688624794231054976, WD 1944-421, EC 19442-4207, TYC 7941-694-1, AAVSO 1940-42, Gaia DR1 6688624794231054976, LSE 186, GSC 07941-00694, Gaia EDR3 6688624794231054976, 2RXP J194740.5-415934, PPM 325476, UCAC4 240-175184, CD-42 14462, 2E 4290, V* V3885 Sgr, PM J19476-4200, WEB 17115, WG 35, HIC 97394, 1RXS J194742.1-415952, Gaia DR3 6688624794231054976, 2MASS J19474052-4200264, HIP 97394, CPD-42 8912, WD 1944-42, TIC 79880315, ALS 18984, 2E 1944.1-4208
| Parameter | Unit | Gaia EDR3 | Gaia DR2 | Stilism | Simbad | White Dwarf Catalog (McCook & Sion 1999) |
|---|---|---|---|---|---|---|
| Right ascension | 19 47 40.57 (0.02) | 19 47 40.57 (0.07) | 19 47 40.53 (0.02) | 19 47 39.77 | ||
| Declination | -42 00 27.05 (0.02) | -42 00 27.03 (0.05) | -42 00 26.40 (0.02) | -42 00 33.12 | ||
| Spectral type | sdB | PEC | ||||
| 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] | 7.75 (0.03) | 7.54 (0.08) | 7.75 (0.03) | ||
| Distance | [pc] | 128.97 (0.6) | 132.68 (1) | 128.97 (0.6) | ||
| Composition | ||||||
| Proper motion (right ascension) | [mas/yr] | 30.10282737 (0.03) | 30.176 (0.1) | 30.103 (0.03) | ||
| Proper motion (declination) | [mas/yr] | -40.83772268 (0.02) | -40.657 (0.09) | -40.838 (0.02) | ||
| Variability | ||||||
| Magnetic | yes | |||||
| Bd | [MG] | |||||
| Infrared excess (disk) | ||||||
| Binarity | ||||||
| B magnitude | 10.36 (0.07) | |||||
| V magnitude | 10.31 (0.03) | |||||
| R magnitude | 10.52 (0.02) | |||||
| I magnitude | ||||||
| J magnitude | 9.96 (0.03) | |||||
| H magnitude | 9.73 (0.03) | |||||
| K magnitude | 9.62 (0.03) | |||||
| u magnitude | ||||||
| g magnitude | ||||||
| r magnitude | ||||||
| i magnitude | 10.38 (0.1) | |||||
| z magnitude | ||||||
| G magnitude | 10.22 (0.02) | 10.25 | 10.22 (0.006) | |||
| BP magnitude | 10.25 (0.02) | 10.28 | ||||
| RP magnitude | 10.13 (0.01) | 10.16 | ||||
| Pan g magnitude | ||||||
| Pan r magnitude | ||||||
| Pan i magnitude | ||||||
| Pan z magnitude | ||||||
| Pan y magnitude | ||||||
| E(B-V) | 0.009 | |||||
* 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.