Eta Persei information

η Persei
	Location of η Per (circled)
Observation data; Epoch J2000 Equinox J2000
Constellation	Perseus
Right ascension	02h 50m 41.766s
Declination	+55° 53′ 43.7876″
Apparent magnitude (V)	3.79
Characteristics
Spectral type	K3 Ib
U−B color index	+1.90
B−V color index	+1.69
Astrometry
Radial velocity (Rv)	−1.07 ± 0.27 km/s
Proper motion (μ)	RA: +16.574 mas/yr ; Dec.: −12.709 mas/yr
Parallax (π)	4.2061 ± 0.3744 mas
Distance	780 ± 70 ly ; (240 ± 20 pc)
Absolute magnitude (MV)	−4.29
Details
Radius	134 R☉
Luminosity	4,130 L☉
Temperature	3,986±170 K
Rotational velocity (v sin i)	5.8 km/s
Other designations
	Miram, η Persei, η Per, Eta Per, 15 Persei, BD+55 714, CCDM J02506+5553A, FK5 99, GC 3390, HD 17506, HIP 13268, HR 834, IDS 02434+5529 A, PPM 28039, SAO 23655, WDS J02507+5554A
Database references
SIMBAD	data

Eta Persei (η Persei, abbreviated Eta Per, η Per), is a binary star and the 'A' component of a triple star system (the 'B' component is the star HD 237009)^[7] in the constellation of Perseus. It is approximately 1331 light-years away from Earth.

The two components of Eta Persei itself are designated Eta Persei A (officially named Miram /ˈmaɪræm/, a recent name for the system)^[8] and B.

^ ^a ^b ^c ^d ^e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ ^a ^b ^c Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
^ ^a ^b De Medeiros, J. R.; Udry, S.; Burki, G.; Mayor, M. (2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics. 395: 97–98. arXiv:1312.3474. Bibcode:2002A&A...395...97D. doi:10.1051/0004-6361:20021214. S2CID 263226802.
^ Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.
^ Ryon, Jenna; Shetrone, Matthew D.; Smith, Graeme H. (2009). "Comparing the Ca ii H and K Emission Lines in Red Giant Stars". Publications of the Astronomical Society of the Pacific. 121 (882): 842. arXiv:0907.3346. Bibcode:2009PASP..121..842R. doi:10.1086/605456. S2CID 17821279.
^ ^a ^b ^c Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.
^ "Washington Double Star Catalog". United States Naval Observatory. Archived from the original on 14 February 2011. Retrieved 2 January 2018.
^ "Naming Stars". IAU.org. Retrieved 16 December 2017.

[dr2-1] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[ducati-2] Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.

[cat-3] De Medeiros, J. R.; Udry, S.; Burki, G.; Mayor, M. (2002). "A catalog of rotational and radial velocities for evolved stars. II. Ib supergiant stars". Astronomy and Astrophysics. 395: 97–98. arXiv:1312.3474. Bibcode:2002A&A...395...97D. doi:10.1051/0004-6361:20021214. S2CID 263226802.

[4] Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv:astro-ph/0409579. Bibcode:2005A&A...430..165F. doi:10.1051/0004-6361:20041272. S2CID 17804304.

[ryon-5] Ryon, Jenna; Shetrone, Matthew D.; Smith, Graeme H. (2009). "Comparing the Ca ii H and K Emission Lines in Red Giant Stars". Publications of the Astronomical Society of the Pacific. 121 (882): 842. arXiv:0907.3346. Bibcode:2009PASP..121..842R. doi:10.1086/605456. S2CID 17821279.

[messinio-6] Messineo, M.; Brown, A. G. A. (2019). "A Catalog of Known Galactic K-M Stars of Class I Candidate Red Supergiants in Gaia DR2". The Astronomical Journal. 158 (1): 20. arXiv:1905.03744. Bibcode:2019AJ....158...20M. doi:10.3847/1538-3881/ab1cbd. S2CID 148571616.

[WDS-7] "Washington Double Star Catalog". United States Naval Observatory. Archived from the original on 14 February 2011. Retrieved 2 January 2018.

[IAU-LSN-8] "Naming Stars". IAU.org. Retrieved 16 December 2017.

Observation data Epoch J2000 Equinox J2000
Location of η Per (circled)
Constellation	Perseus
Right ascension	02^h 50^m 41.766^s^[1]
Declination	+55° 53′ 43.7876″^[1]
Apparent magnitude (V)	3.79^[2]
Characteristics
Spectral type	K3 Ib^[3]
U−B color index	+1.90^[2]
B−V color index	+1.69^[2]
Astrometry

Radial velocity (R_v)	−1.07 ± 0.27^[4] km/s
Proper motion (μ)	RA: +16.574^[1] mas/yr Dec.: −12.709^[1] mas/yr
Parallax (π)	4.2061 ± 0.3744 mas^[1]
Distance	780 ± 70 ly (240 ± 20 pc)
Absolute magnitude (M_V)	−4.29^[5]

Details

Radius	134^[6] `R`_☉
Luminosity	4,130^[6] `L`_☉
Temperature	3,986±170^[6] K
Rotational velocity (v sin i)	5.8^[3] km/s

Other designations
Miram, η Persei, η Per, Eta Per, 15 Persei, BD+55 714, CCDM J02506+5553A, FK5 99, GC 3390, HD 17506, HIP 13268, HR 834, IDS 02434+5529 A, PPM 28039, SAO 23655, WDS J02507+5554A
Database references
SIMBAD	data

Eta Persei information

and 22 Related for: Eta Persei information

Eta Persei

Light echo

NGC 957

List of brightest natural objects in the sky

A Treatise on the Astrolabe

Behenian fixed star

Hypergiant

Canopus

Omicron

List of most luminous stars

List of nearest supergiants

Blue supergiant

List of Arabic star names

List of largest stars

Chapter 24 Records

Stellar classification

List of most massive stars

List of nearest bright stars

Caldwell catalogue

Variable star

Stellar kinematics

List of Chinese star names