All names: SDSS J144232.02+171041.07, PG 1440+174, 2MASS J14423201+1710410, Gaia DR2 1234989881433355392, Gaia EDR3 1234989881433355392, UCAC4 536-056589, UCAC2 37904529, Gaia DR3 1234989881433355392, PG1440+174, TIC 119640020, SDSS J144232.02+171041.0, SDSS J144232.01+171041.0
| Parameter | Unit | Gaia EDR3 | Pan-STARRS DR1 | SDSS DR12 | Geier 2020 | Gaia DR2 | Stilism | Kepler et al. 2016 | Simbad |
|---|---|---|---|---|---|---|---|---|---|
| Right ascension | 14 42 32.02 (0.03) | 14 42 32.02 | 14 42 32.00 | 14 42 32.02 (0.05) | 14 42 32.02 (0.03) | ||||
| Declination | 17 10 41.04 (0.03) | 17 10 41.03 | 17 10 41.41 | 17 10 41.04 (0.04) | 17 10 41.09 (0.03) | ||||
| Spectral type | sdB+MS | sdB | sdB+F0?kA2 | ||||||
| Effective temperature | [K] | 25708.0 (311) | |||||||
| log(g) | [cgs] | 4.86 (0.04) | |||||||
| Mass | [M☉] | ||||||||
| log(Luminosity) | [L☉] | ||||||||
| Cooling age | [Gyr] | ||||||||
| log(H/He) | |||||||||
| log(C/He) | |||||||||
| log(Ca/He) | |||||||||
| log(Ca/H) | |||||||||
| Parallax | [mas] | 0.23 (0.04) | 0.31 (0.06) | 0.31 (0.06) | 0.23 (0.04) | ||||
| Distance | [pc] | 4266.33 (674) | 3272.25 (609) | 3271.98 (610) | 4266.21 (673) | ||||
| Composition | |||||||||
| Proper motion (right ascension) | [mas/yr] | -1.486208211 (0.04) | -1.613 (0.08) | -1.612780463 (0.08) | -1.486 (0.04) | ||||
| Proper motion (declination) | [mas/yr] | -2.939582633 (0.04) | -2.928 (0.09) | -2.927801776 (0.09) | -2.94 (0.04) | ||||
| Variability | |||||||||
| Magnetic | |||||||||
| Bd | [MG] | ||||||||
| Infrared excess (disk) | |||||||||
| Binarity | |||||||||
| B magnitude | 15.66 (0.04) | ||||||||
| V magnitude | 15.57 (0.04) | ||||||||
| R magnitude | 15.67 (0.1) | ||||||||
| I magnitude | |||||||||
| J magnitude | 15.09 (0.04) | 15.09 (0.04) | |||||||
| H magnitude | 14.88 (0.07) | 14.88 (0.07) | |||||||
| K magnitude | 14.78 (0.1) | 14.78 (0.1) | |||||||
| u magnitude | 15.76 (0.005) | 15.78 (0.005) | 15.78 (0.02) | 15.78 (0.005) | |||||
| g magnitude | 15.48 (0.004) | 15.48 (0.004) | 15.49 (0.02) | 15.48 (0.004) | |||||
| r magnitude | 15.57 (0.004) | 15.57 (0.004) | 15.57 (0.01) | 15.57 (0.004) | |||||
| i magnitude | 15.63 (0.005) | 15.63 (0.005) | 15.64 (0.01) | 15.63 (0.005) | |||||
| z magnitude | 15.72 (0.006) | 15.72 (0.006) | 15.74 (0.01) | 15.72 (0.006) | |||||
| G magnitude | 15.47 (0.002) | 15.49 (0.0009) | 15.49 | 15.47 (0.003) | |||||
| BP magnitude | 15.53 (0.002) | 15.51 (0.009) | 15.51 | ||||||
| RP magnitude | 15.31 (0.003) | 15.32 (0.002) | 15.32 | ||||||
| Pan g magnitude | 15.51 (0.002) | 15.51 (0.002) | |||||||
| Pan r magnitude | 15.57 (0.003) | 15.57 (0.003) | |||||||
| Pan i magnitude | 15.66 (0.001) | 15.66 (0.001) | |||||||
| Pan z magnitude | 15.74 (0.003) | 15.74 (0.003) | |||||||
| Pan y magnitude | 15.78 (0.004) | 15.78 (0.004) | |||||||
| E(B-V) | 0.028 | ||||||||
* 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.