10 Leonis Minoris

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10 Leonis Minoris
Leo Minor constellation map.svg
Red circle.svg
Location of 10 Leonis Minoris (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Leo Minor
Right ascension 09h 34m 13.38184s [1]
Declination 36° 23 51.2090 [1]
Apparent magnitude  (V)4.54 [2]
Characteristics
Spectral type G8.5 III [3]
U−B color index +0.61 [4]
B−V color index +0.92 [4]
Variable type RS CVn [5]
Astrometry
Radial velocity (Rv)−11.94 [6]  km/s
Proper motion (μ)RA: +6.989 [1]   mas/yr
Dec.: −22.729 [1]   mas/yr
Parallax (π)17.0738 ± 0.1341  mas [1]
Distance 191 ± 2  ly
(58.6 ± 0.5  pc)
Absolute magnitude  (MV)0.83 [7]
Details
Mass 2.54 [8]   M
Radius 8.74±0.29 [9]   R
Luminosity 46.44±1.65 [9]   L
Surface gravity (log g)2.93 [10]   cgs
Temperature 5,099 [8]   K
Metallicity [Fe/H]−0.04 [10]   dex
Rotational velocity (v sin i)4.7 [11]  km/s
Other designations
10 LMi, SU Leonis Minoris, BD+37°2004, FK5  360, GC  13203, HD  82635, HIP  46952, HR  3800, SAO  61570 [12]
Database references
SIMBAD data

10 Leonis Minoris is a single [13] variable star in the northern constellation Leo Minor, located approximately 191  light years away based on parallax. It has the variable star designation SU Leonis Minoris; 10 Leonis Minoris is the Flamsteed designation. This body is visible to the naked eye as a faint, orange-hued star with a baseline apparent visual magnitude of 4.54. [2] It is moving closer to the Earth with a heliocentric radial velocity of −12 km/s. [6]

A near-infrared (y band) light curve for SU Leonis Minoris, adapted from Skiff and Lockwood (1986) SULMiLightCurve.png
A near-infrared (y band) light curve for SU Leonis Minoris, adapted from Skiff and Lockwood (1986)

This is an evolved giant star with a stellar classification of G8.5 III. [3] It is reported as a RS CVn variable with magnitude varying by 0.02 mag. [5] and showing a high level of chromospheric activity. [15] The star has 2.54 times the mass of the Sun and has expanded to 8.7 times the Sun's radius. It is radiating 46 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,099 K. [8] [9]

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References

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