V385 Andromedae

V385 Andromedae is a variable star in the constellation Andromeda, about 360 parsecs (1,200 ly) away. It is a red giant over a hundred times larger than the sun. It has an apparent magnitude around 6.4, just about visible to the naked eye in ideal conditions.

A light curve for V385 Andromedae, plotted from MASCARA data^[2]

V385 Andromedae

Location of V385 Andromedae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Andromeda
Right ascension	23h 24m 08.868s[1]
Declination	+41° 36′ 46.35″[1]
Apparent magnitude (V)	6.413[2]
Characteristics
Evolutionary stage	Red giant
Spectral type	M0[3]
B−V color index	+1.66[4]
Variable type	LB[3][2]
Astrometry
Proper motion (μ)	RA: -12.02 ± 0.31[1] mas/yr Dec.: 2.46 ± 0.29[1] mas/yr
Parallax (π)	2.7775±0.1334 mas[5]
Distance	1,170 ± 60 ly (360 ± 20 pc)
Details
Radius	113[5] R☉
Luminosity	1,843[5] L☉
Temperature	3,563[5] K
Other designations
HD 220524, BD+40 5065, HIP 115530, SAO 52978, PPM 64169
Database references
SIMBAD	data

V385 Andromedae was identified as a long-period variable in 1999 from analysis of Hipparcos photometry.^[6] It was classified as a slow irregular variable,^[3] but analysis of its light curve identified a possible 36 day period.^[2] It varies by about 0.1 magnitudes.^[2][3]