LP Andromedae
LP Andromedae (often abbreviated to LP And) is a carbon star in the constellation Andromeda. It is also a Mira variable whose mean apparent visual magnitude is 15.12 and has pulsations with an amplitude of 1.50 magnitudes and a period of 614 days.

In 1974 LP Andromedae, known then as IRC+40540, was identified as a carbon star and also shown to be variable. It had previously been suspected of variability during the 2 Micron All Sky Survey (2MASS). A detailed study of its spectrum showed an unusually cool star with a basic class of C8, and Swan band strength of 3.5. It also showed strong C13 isotopic bands. The period was narrowed down to around 614 days, one of the longest periods known for a Mira variable.

This star has a dusty envelope with an estimated mass of 3.2 , fueled by the star itself which is losing mass at a rate 1.9 /yr. Such a high mass loss rate should place LP Andromedae close to the end of its asymptotic giant branch evolution. The envelope extends to a distance of 3 parsec from the star, and is mainly made of silicon carbide and carbon particles.
Q130019
carbon star
Concept
Q8928
constellation
Concept
Q9256
Andromeda
CEL
Q744691
Mira variable
CEL
Q124313
apparent visual magnitude
Concept
Q1454942
2 Micron All Sky Survey
DIS
Q3417673
Swan band
UNK
Q50089
asymptotic giant branch
Concept
Q12129
parsec
Concept
Q412356
silicon carbide
Concept
Q623
carbon
Concept
Q60753372
LP Andromedae
CEL
Q60753372
LP Andromedae
CEL
Q60753372
LP Andromedae
CEL
1974-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1974
DATE
+15.12^^http://www.w3.org/2001/XMLSchema#decimal
15.12
NUMBER
+1.50^^http://www.w3.org/2001/XMLSchema#decimal
1.50
NUMBER
++40540^^http://www.w3.org/2001/XMLSchema#decimal
+40540
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
+8^^http://www.w3.org/2001/XMLSchema#decimal
8
NUMBER
+3.5^^http://www.w3.org/2001/XMLSchema#decimal
3.5
NUMBER
+13^^http://www.w3.org/2001/XMLSchema#decimal
13
NUMBER
+3.2^^http://www.w3.org/2001/XMLSchema#decimal
3.2
NUMBER
+1.9^^http://www.w3.org/2001/XMLSchema#decimal
1.9
NUMBER
+3^^http://www.w3.org/2001/XMLSchema#decimal
3
NUMBER
constellation
apparent magnitude
instance of