EGGR 450

All names: LSPM J2149+5408, NLTT 52238, 2MASS J21495915+5408385, EGGR 450, WD 2148+53, Gaia DR2 2173871656498100096, Gaia EDR3 2173871656498100096, G 232-38, USNO-B1.0 1441-00377066, TIC 365280520, LHS 6387, WD 2148+539, G232-38, 2148+539, Gaia DR3 2173871656498100096

Parameter Unit Gaia EDR3 Pan-STARRS DR1 Leggett et al. 2018 MWDD H Gaia DR2 Stilism Gianninas et al. 2011 Gianninas et al. 2005 Vincent et al. 2024 Simbad White Dwarf Catalog (McCook & Sion 1999)
Right ascension 21 49 59.91 (0.05) 21 49 59.88 (0.07) 21 49 59.91 21 49 59.19 (0.05) 21 49 58.03
Declination 54 08 41.96 (0.04) 54 08 41.88 (0.06) 54 08 41.96 54 08 39.50 (0.04) 54 08 33.00
Spectral type DA4.9 DA DA DA DA4.2 DA5
Effective temperature [K] 10320.0 (261) 10886.0 11900.0 (187) 11590.0 10896.0 (119)
log(g) [cgs] 7.97 (0.09) 7.87 8.09 (0.05) 8.02 7.86 (0.01)
Mass [M] 0.582 (0.07) 0.528 0.66 (0.03) 0.524 (0.01)
log(Luminosity) [L]
Cooling age [Gyr] 0.5320 (0.07) 0.4103
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] 9.30 (0.05) 10.65 (0.8) 9.36 (0.07) 9.30 9.30 (0.05)
Distance [pc] 107.52 (0.6) 93.90 (7) 106.85 (0.8) 96.00 107.52 107.52 (0.6)
Composition H H
Proper motion (right ascension) [mas/yr] 393.7549989 (0.07) 393.80709 (0.1) 393.755 (0.07)
Proper motion (declination) [mas/yr] 153.5146669 (0.05) 153.6774841 (0.1) 153.515 (0.05)
Variability VAR VAR
Magnetic
Bd [MG]
Infrared excess (disk)
Binarity
B magnitude 16.20
V magnitude 16.40
R magnitude 16.10
I magnitude
J magnitude 15.92 (0.09)
H magnitude 15.42 (0.1)
K magnitude 15.00 (0.1)
u magnitude
g magnitude
r magnitude
i magnitude
z magnitude
G magnitude 16.85 (0.005) 16.88 16.85 16.85 (0.003)
BP magnitude 16.88 (0.005) 16.87
RP magnitude 16.85 (0.005) 16.84
Pan g magnitude 16.83 (0.009)
Pan r magnitude 16.96 (0.006)
Pan i magnitude 17.15 (0.007)
Pan z magnitude 17.33 (0.03)
Pan y magnitude 17.49 (0.01)
E(B-V) 0.012
Period #1 [s] 741.6
Amplitude #1 [mma]
Period #2 [s] 984.0
Amplitude #2 [mma]
Period #3 [s] 1147.4
Amplitude #3 [mma]

* 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.