The visual band light curve of R Equulei, from AAVSO data[1]
Observation data Epoch J2000 Equinox J2000
Constellation
Equuleus
Right ascension
21h 13m 11.49118s[2]
Declination
12° 48′ 06.1620″[2]
Apparent magnitude (V)
8.7 - 15.0[3]
Characteristics
Spectral type
M3e - M4e[3]
B−V color index
+1.41[4]
Variable type
Mira[3]
Astrometry
Radial velocity (Rv)
−54±5[5] km/s
Proper motion (μ)
RA: −2.713[2] mas/yr Dec.: −11.232[2] mas/yr
Parallax (π)
0.4329 ± 0.0437 mas[2]
Distance
approx. 7,500 ly (approx. 2,300 pc)
Details
Mass
3.42[6]M☉
Luminosity
33,791[7]L☉
Surface gravity (log g)
−0.007[6] cgs
Temperature
3,395[6] K
Metallicity [Fe/H]
−0.13[6] dex
Other designations
R Equ, BD+12°4573a, HD 202051, PPM 139768[8]
Database references
SIMBAD
data
R Equulei is a class M Mira variable star in the constellation Equuleus. Its brightness varies between a minimum magnitude of 15.0 to a maximum of 8.7 with an average period of 261 days.[3]
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^ abcdeCite error: The named reference GaiaEDR3 was invoked but never defined (see the help page).
^ abcdCite error: The named reference gcvs was invoked but never defined (see the help page).
^Cite error: The named reference Zacharias_et_al_2012 was invoked but never defined (see the help page).
^Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
^ abcdCite error: The named reference starhorse was invoked but never defined (see the help page).
^Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
^Cite error: The named reference simbad was invoked but never defined (see the help page).
REquulei is a class M Mira variable star in the constellation Equuleus. Its brightness varies between a minimum magnitude of 15.0 to a maximum of 8.7...
6.1, 6 Equulei. It is divisible in binoculars. 6 Equulei is an astrometric binary system itself, with an apparent magnitude of 6.07. REquulei is a Mira...
Alpha Equulei (α Equulei, abbreviated Alpha Equ, α Equ), officially named Kitalpha /kɪˈtælfə/, is a star in the constellation of Equuleus. It is a high...
Beta Equulei, Latinized from β Equulei, is the Bayer designation for a solitary star in the northern constellation of Equuleus. It is faintly visible...
Gamma Equulei, Latinized from γ Equulei, is a double star in the northern constellation of Equuleus. It is located at a distance of around 118 light-years...
2 Equulei is a double star system in the constellation of Equuleus. The primary component of the 2 Equulei pair is an F-type main sequence star. As of...
SY Equulei, also known as HD 203664, is a single variable star located in the equatorial constellation Equuleus. It has an average apparent magnitude...
Epsilon Equulei, Latinized from ε Equulei, is a star system of apparent magnitude +5.23 in the constellation of Equuleus. It is located 180 light years...
Delta Equulei, Latinized from δ Equulei, is the second brightest star in the constellation Equuleus. Delta Equulei is a binary star system about 60 light...
4 Equulei is a binary star system in the constellation of Equuleus, located about 3° to the east of Alpha Equulei. With an apparent visual magnitude of...
3 Equulei is a single star located in the small northern constellation of Equuleus. It is faintly visible to the naked eye at an apparent visual magnitude...
doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR. Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation"...
9 Equulei is an M-type star in the constellation Equuleus. It is an asymptotic giant branch (AGB) star, a star that has exhausted its core helium and...
1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR. Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G...
U Equulei (U Equ / IRAS 20547 +0247) is a variable star in the Equuleus constellation with an apparent magnitude of +14.50 in the B band. It lies at an...
6 Equulei is a probable (95% chance) astrometric binary star system in the northern constellation of Equuleus, located 380 light years from the Sun. It...
has 1.45 times the mass of the Sun and a slightly enlarged radius of 2.2 R☉ due to its evolved state. It shines with a luminosity of about 9 L☉ from...
(R*) is given by: 2 ⋅ R ∗ = ( 131.7 ⋅ 0.75 ⋅ 10 − 3 ) AU 0.0046491 AU / R ⨀ ≈ 21.25 ⋅ R ⨀ {\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(131.7\cdot...
1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR. Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral...
The guide to the galaxy. CUP Archive. p. 31. ISBN 0-521-45882-X. Kepple, G. R.; Sanner, G. W. (1998). The Night Sky Observer's Guide. Vol. 1. Willmann-Bell...
H. Jr. (November 1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally...
solitary star located in the northern constellation Equuleus just next to 3 Equulei It has an apparent magnitude of 6.14, making it barely visible to the naked...
Tales: Constellation Mythology and History – Ian Ridpath's Star Tales. VizieR – CDS's archive of constellation boundaries. The text file constbnd.dat gives...
cartography. New York, New York: Springer. p. 131. ISBN 978-0-387-71668-8. Gent, R.H. van. "A Pair of Puzzling Star Maps and Two Unknown Constellations". webspace...
(asterism), refers to an asterism consisting of Beta Aquarii and Alpha Equulei. Consequently, the Chinese name for Beta Aquarii itself is 虛宿一 (Xū Xiù...
was also used in the published search for variability in the stars Gamma Equulei and HD 149728, using 1958 and 1959 data from the refracting telescope....
"MOST photometry and modeling of the rapidly oscillating (roAp) star γ Equulei". Astronomy and Astrophysics. 480 (1): 223–232. arXiv:0801.0863. Bibcode:2008A&A...
subgiant. It has 125% of the mass of the Sun and an enlarged radius of 8.26 R☉. It shines at 37.1 times the luminosity of the Sun from its photosphere at...
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