h Persei

Open star cluster h Persei

h Persei on the right and Chi Persei on the left in the picture
AladinLite
Constellation	Perseus
Position equinox : J2000.0
Right ascension	02 ^h 19 ^m
declination	+ 57 ° 09 ′
Appearance
classification	I3r
Brightness (visual)	+5.3 mag
Brightness (B-band)	+5.74 mag
Angular expansion	30 ′
Redness ( excess color E (BV))	0.567
Physical data
Affiliation	Perseus OB1, Milky Way
Redshift	−0.000130 ± 0.000006
Radial velocity	(−39 ± 2) km / s
distance	approx. 8300 ly (approx. 2500 pc )
history
Discovered by	Hipparchus
Discovery time	‍130 BC Chr.
Catalog names
NGC 869 • C 0215 + 569 • OCl 350 • Mel 13 • Cr 24 • Lund 73 • GC 512 • Raab 9 • h 207 • H VI 33

h Persei (NGC 869) and Chi Persei (NGC 884) are two closely spaced, open star clusters in the constellation Perseus .

The apparent brightness is 5.3 mag with an angular extension of 30 '. With the naked eye, h Persei can be seen as a faint spot of nebula.

The property was built in 130 BC. Described by the Greek astronomer Hipparchus .

Stars (selection)

Surname	apparent brightness	Spectral class	Proper movement ( mas / a ) right ascension	Proper movement ( mas / a ) declination	Distance (Lj)
HD 14134	6.57	B3 Ia	−0.64	−1.29	8000
HD 14143	6.70	B3 I	−0.35	−1.28	7600
HD 14052	7.79	B1 Ib	−0.41	−1.19	7000
V757 Persei	7.83	B0.7 I.	−0.04	−0.99	11000
HD 13969	8.02	B0.5 I.	+0.74	−2.28	7800
BD + 56 ° 473	8.07	B1 III / Ve	−0.39	−1.15	8800