Rho Lupi information

Rho Lupi
	; A light curve for Rho Lupi, plotted from TESS data
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Lupus
Right ascension	14h 37m 53.22583s
Declination	−49° 25′ 32.9798″
Apparent magnitude (V)	4.05
Characteristics
Spectral type	B3/4 V
U−B color index	−0.56
B−V color index	−0.15
Astrometry
Radial velocity (Rv)	8.00±7.40 km/s
Proper motion (μ)	RA: −28.26 mas/yr ; Dec.: −28.82 mas/yr
Parallax (π)	10.32 ± 0.16 mas
Distance	316 ± 5 ly ; (97 ± 2 pc)
Absolute magnitude (MV)	−0.88
Details
Mass	4.66 M☉
Radius	3.4 R☉
Luminosity	365 L☉
Temperature	15,947±542 K
Rotational velocity (v sin i)	166 km/s
Age	44 Myr
Other designations
	ρ Lup, CD−48° 9198, FK5 3158, HD 128345, HIP 71536, HR 5453, SAO 225071.
Database references
SIMBAD	data

Rho Lupi, Latinized from ρ Lupi, is a solitary^[11] star in the southern constellation of Lupus. It is visible to the naked eye with an apparent visual magnitude of 4.05.^[3] Based upon an annual parallax shift of 10.32 mas as seen from Earth, it is located about 316 light years from the Sun. It is a member of the Upper Centaurus–Lupus subgroup of the nearby Scorpius–Centaurus association.^[12]

This is a B-type main sequence star with a stellar classification of B3/4 V.^[4] It is a microvariable with a period of 10.7 hours and an amplitude of 0.0046 in magnitude.^[13] With an age of just 44^[7] million years, the star is spinning with a projected rotational velocity of 166 km/s.^[7] This is giving the star an oblate shape with an equatorial bulge that is an estimated 6% larger than the polar radius.^[14] It has an estimated 4.66^[7] times the mass of the Sun and about 3.4^[8] times the Sun's radius. It is radiating 365^[9] times the solar luminosity from its outer atmosphere at an effective temperature of 15,947 K.^[7]

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[Johnson1966-3] Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).

[houk1978-4] Cite error: The named reference houk1978 was invoked but never defined (see the help page).

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[David2015-7] ^ ^a ^b ^c ^d ^e ^f ^g ^h Cite error: The named reference David2015 was invoked but never defined (see the help page).

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[Mcdonald2012-9] Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).

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[Chen2012-12] Cite error: The named reference Chen2012 was invoked but never defined (see the help page).

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[belle2012-14] Cite error: The named reference belle2012 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
A light curve for Rho Lupi, plotted from TESS data^[1]
Constellation	Lupus
Right ascension	14^h 37^m 53.22583^s^[2]
Declination	−49° 25′ 32.9798″^[2]
Apparent magnitude (V)	4.05^[3]
Characteristics
Spectral type	B3/4 V^[4]
U−B color index	−0.56^[3]
B−V color index	−0.15^[3]
Astrometry

Radial velocity (R_v)	8.00±7.40^[5] km/s
Proper motion (μ)	RA: −28.26^[2] mas/yr Dec.: −28.82^[2] mas/yr
Parallax (π)	10.32 ± 0.16 mas^[2]
Distance	316 ± 5 ly (97 ± 2 pc)
Absolute magnitude (M_V)	−0.88^[6]

Details

Mass	4.66^[7] `M`_☉
Radius	3.4^[8] `R`_☉
Luminosity	365^[9] `L`_☉
Temperature	15,947±542^[7] K
Rotational velocity (v sin i)	166^[7] km/s
Age	44^[7] Myr

Other designations
ρ Lup, CD−48° 9198, FK5 3158, HD 128345, HIP 71536, HR 5453, SAO 225071.^[10]
Database references
SIMBAD	data

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