LP 239-54

All names: Gaia EDR3 1922778419431649280, LP 239-54, NLTT 58060, SDSS J234857.96+430038.9, 23489+4300, USNO-B1.0 1330-00610697, PM J23489+4300, SDSS J234857.97+430038.91, LSPM J2348+4300, WDJ234857.91+430039.83, Gaia DR2 1922778419431649280, TIC 177251444, PSO J357.2422+43.0100, 2MASS J23485788+4300400, J2348+4300, Gaia DR3 1922778419431649280, SDSS J234857.97+430038.9

Parameter Unit Gaia EDR3 Pan-STARRS DR1 SDSS DR10 Caron et al. 2023 Blouin et al. 2019 MWDD H MWDD HE Gaia DR2 Stilism Limoges et al. 2015 Kepler et al. 2015 Vincent et al. 2024 Simbad Gentile Fusillo et al. 2018 Vincent et al. 2023
Right ascension 23 48 58.15 (0.07) 23 48 57.97 23 48 58.14 (0.1) 23 48 58.15 23 48 57.91 (0.07) 23 48 58.14
Declination 43 00 35.87 (0.06) 43 00 38.92 43 00 35.99 (0.08) 43 00 35.87 43 00 39.82 (0.06) 43 00 35.99
Spectral type DC DC DC DC DC DC: DC DC DA:
Effective temperature [K] 4788.0 (17) 4750.0 (20) 4762.0 4456.0 4810.0 (63) 6255.0 (500) 4744.0 (36)
log(g) [cgs] 7.29 (0.01) 7.26 (0.03) 7.27 7.02 8.00 (0) 4.41 (0.5) 7.25 (0.03)
Mass [M] 0.249 (0.007) 0.239 (0.009) 0.241 0.164 0.58 (0.1) 0.236 (0.01)
log(Luminosity) [L] -4.11
Cooling age [Gyr] 2.1000 2.1100 (0.06) 2.1100 2.0150
log(H/He)
log(C/He)
log(Ca/He)
log(Ca/H)
log(C/H)
log(N/H)
log(O/H)
log(Na/H)
log(Mg/H)
log(Al/H)
log(Si/H)
log(P/H)
log(S/H)
log(Sc/H)
log(Ti/H)
log(Cr/H)
log(Mn/H)
log(Fe/H)
log(Ni/H)
Parallax [mas] 19.06 (0.1) 18.93 (0.1) 18.93 (0.1) 18.93 (0.1) 19.06 19.06 (0.1) 18.93 (0.1)
Distance [pc] 52.46 (0.3) 52.83 (0.4) 52.82 (0.4) 52.82 (0.4) 36.20 (4) 52.46 52.46 (0.3) 52.82 (0.4)
Composition H H H
Proper motion (right ascension) [mas/yr] 167.2743752 (0.09) 167.2895554 (0.2) 162.0 167.274 (0.09) 167.2895554
Proper motion (declination) [mas/yr] -247.0487602 (0.07) -247.3422277 (0.1) -247.0 -247.049 (0.07) -247.3422277
Variability
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 18.60
V magnitude
R magnitude 17.50
I magnitude
J magnitude 16.49 (0.02) 16.67 (0.1) 16.67 16.67 (0.1)
H magnitude 15.95 (0.1) 15.95 (0.1) 15.95 15.95 (0.1)
K magnitude 15.74 (0.2) 15.74 (0.2) 15.74 15.74 (0.2)
u magnitude 20.32 (0.04) 20.31 (0.04) 20.32 20.32 (0.04) 20.32 (0.04) 20.32 (0.04)
g magnitude 18.64 (0.008) 18.64 18.64 (0.01) 18.52 (0.007) 18.64 (0.008)
r magnitude 17.81 (0.006) 17.81 17.81 (0.01) 17.82 (0.004) 17.81 (0.006)
i magnitude 17.50 (0.006) 17.50 17.50 (0.01) 17.50 (0.009) 17.50 (0.006)
z magnitude 17.35 (0.01) 17.36 17.35 (0.01) 17.41 (0.005) 17.35 (0.01)
G magnitude 17.85 (0.02) 17.87 17.85 17.85 (0.003) 17.87
BP magnitude 18.41 (0.02) 18.40 18.40
RP magnitude 17.17 (0.007) 17.18 17.18
Pan g magnitude 18.52 (0.009) 18.52 (0.007) 18.52 (0.007)
Pan r magnitude 17.82 (0.005) 17.82 (0.004) 17.82 (0.004)
Pan i magnitude 17.50 (0.009) 17.50 (0.009) 17.50 (0.009)
Pan z magnitude 17.41 (0.005) 17.41 (0.005) 17.41 (0.005)
Pan y magnitude 17.39 (0.01) 17.39 (0.007) 17.39 (0.007)
E(B-V) 0.003

* Constant surface field

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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.