All names: UCAC4 558-057607, SDSS J162109.02+212919.7, TIC 458721815, SDSSJ162109.01+212919.8, SDSS J162109.01+212919.8, PG 1618+216, Gaia EDR3 1298448744787807616, SDSS J162109.02+212919.75, GALEX J162109.0+212919, Gaia DR3 1298448744787807616, 2MASS J16210901+2129198, Gaia DR2 1298448744787807616
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR10 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2015 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 16 21 09.01 (0.02) | 16 21 09.02 | 16 21 09.02 | 16 21 09.02 (0.04) | 16 21 09.02 (0.02) | ||||
| Declination | 21 29 19.79 (0.03) | 21 29 19.83 | 21 29 19.82 | 21 29 19.79 (0.04) | 21 29 19.80 (0.03) | ||||
| Spectral type | sdB | DAB/sdB | sdB | ||||||
| Effective temperature | [K] | 29876.0 (177) | |||||||
| log(g) | [cgs] | 5.00 (0.05) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.12 (0.04) | 0.16 (0.06) | 0.16 (0.06) | 0.12 (0.04) | ||||
| Distance | [pc] | 8117.16 (2741) | 6277.46 (2317) | 6277.46 (2317) | 8116.88 (2741) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -8.111225768 (0.03) | -8.271 (0.08) | -8.271 (0.08) | -8.111 (0.04) | ||||
| Proper motion (declination) | [mas/yr] | -0.172275451 (0.04) | -0.26 (0.08) | -0.26 (0.08) | -0.172 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.87 (0.04) | ||||||||
| V magnitude | 16.09 (0.01) | ||||||||
| R magnitude | 15.81 (0.2) | ||||||||
| I magnitude | |||||||||
| J magnitude | 16.40 (0.1) | 16.40 (0.1) | |||||||
| H magnitude | 16.73 | ||||||||
| K magnitude | 15.94 | ||||||||
| u magnitude | 15.80 (0.005) | 15.80 (0.005) | 15.81 (0.02) | 15.80 (0.005) | |||||
| g magnitude | 15.81 (0.004) | 15.81 (0.004) | 15.82 (0.01) | 15.81 (0.004) | |||||
| r magnitude | 16.24 (0.005) | 16.24 (0.005) | 16.25 (0.01) | 16.24 (0.005) | |||||
| i magnitude | 16.55 (0.006) | 16.55 (0.006) | 16.55 (0.01) | 16.55 (0.006) | |||||
| z magnitude | 16.82 (0.009) | 16.82 (0.009) | 16.83 (0.02) | 16.82 (0.009) | |||||
| G magnitude | 16.03 (0.002) | 16.05 (0.0009) | 16.05 | 16.03 (0.003) | |||||
| BP magnitude | 15.94 (0.002) | 15.85 (0.008) | 15.85 | ||||||
| RP magnitude | 16.24 (0.003) | 16.23 (0.003) | 16.23 | ||||||
| Pan g magnitude | 15.89 (0.002) | 15.88 (0.002) | |||||||
| Pan r magnitude | 16.25 (0.002) | 16.25 (0.002) | |||||||
| Pan i magnitude | 16.58 (0.002) | 16.58 (0.002) | |||||||
| Pan z magnitude | 16.81 (0.005) | 16.81 (0.005) | |||||||
| Pan y magnitude | 16.97 (0.005) | 16.97 (0.005) | |||||||
| E(B-V) | 0.060 | ||||||||
* 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.