V692 Coronae Australis information

V692 Coronae Australis
	Location of V692 CrA (circled)
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Corona Australis
Right ascension	18h 13m 12.69843s
Declination	−41° 20′ 09.9972″
Apparent magnitude (V)	5.46 (5.46 - 5.51)
Characteristics
Spectral type	B2 III or B1.5 IIIp
B−V color index	−0.17
Variable type	SX Arietis
Astrometry
Radial velocity (Rv)	−15.3±2.8 km/s
Proper motion (μ)	RA: −2.050 mas/yr ; Dec.: −6.210 mas/yr
Parallax (π)	1.7423 ± 0.0977 mas
Distance	1,900 ± 100 ly ; (570 ± 30 pc)
Absolute magnitude (MV)	−6.44 or −2.26
Details
Mass	7.35±0.48 M☉
Radius	12.6±0.7 R☉
Luminosity (bolometric)	4,181 L☉
Surface gravity (log g)	3.52+0.33; −0.14 cgs
Temperature	17,061+1,474; −1,357 K
Rotational velocity (v sin i)	212±9 km/s
Age	31.6±5.1 Myr
Other designations
	3 G. Corona Australis[16], V692 CrA, CD−41°12534, CPD−41°8620, GC 24824, HD 166596, HIP 89290, HR 6804, SAO 228815
Database references
SIMBAD	data

V692 Coronae Australis (HD 166596; HR 6804; 3 G. CrA), or simply V692 CrA, is a whitish-blue hued variable star located in the southern constellation Corona Australis. It has a maximum apparent magnitude of 5.46,^[2] making it faintly visible to the naked eye. The object is located relatively far at a distance of approximately 1,900 light years based on Gaia DR3 parallax measurements,^[1] but it is approaching the Solar System with a fairly constrained heliocentric radial velocity of −15.3 km/s.^[8] At its current distance, V692 CrA's brightness is heavily diminished by 0.46 magnitudes due to extinction due to interstellar dust.^[18] Its absolute magnitude depends on the source: Westin (1985) gave a value of −6.44^[9] while the extended Hipparcos catalogue gave a value of −2.26.^[10]

A light curve for V692 Coronae Australis, plotted from *Hipparcos* data^[19]

Astronomers Carlos and Mercedes Jaschek along with a colleague listed HD 166596 as a Be star in 1964.^[20] However, its status as an Ap star was not observed until 1979 by astronomers N. Vogt and A.M Faundez.^[21] A year later, HD 166596 was observed to be variable and it had a period of 1.67 days.^[22] In 1981, its variability was confirmed and it was given the variable star designation V692 Coronae Australis—the 692nd variable star in Corona Australis.^[23] The star might have a shorter period of 49.8 hours.^[7]

V692 CrA has a stellar classification of B2 III^[4] or B1.5 IIIp,^[5] both indicating that it is a slightly evolved B-type giant star. The second classification indicates that V692 CrA has peculiarities in its spectrum. It has 7.35 times the mass of the Sun^[11] and 12.6 times the Sun's radius.^[12] It radiates at a bolometric luminosity 4,181 times that of the Sun^[11] from its photosphere at an effective temperature of 17,061 K.^[13] V692 CrA is estimated to be 31.6 million years old^[15] and it spins rapidly with a projected rotational velocity of 212 km/s.^[14]

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^ ^a ^b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Rountree1991 was invoked but never defined (see the help page).
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^ ^a ^b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Westin1985 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ ^a ^b ^c ^d Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Gulati1989 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Brown1997 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
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^ Cite error: The named reference Jaschek1964 was invoked but never defined (see the help page).
^ Cite error: The named reference Vogt1979 was invoked but never defined (see the help page).
^ Cite error: The named reference Renson1980 was invoked but never defined (see the help page).
^ Cite error: The named reference Kholopov1981 was invoked but never defined (see the help page).

[GaiaDR3-1] ^ ^a ^b ^c ^d ^e ^f Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).

[Tycho2000-2] Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).

[VSX-3] Cite error: The named reference VSX 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).

[Rountree1991-5] Cite error: The named reference Rountree1991 was invoked but never defined (see the help page).

[Johnson1966-6] Cite error: The named reference Johnson1966 was invoked but never defined (see the help page).

[Samus2017-7] Cite error: The named reference Samus2017 was invoked but never defined (see the help page).

[Gontcharov2006-8] Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).

[Westin1985-9] Cite error: The named reference Westin1985 was invoked but never defined (see the help page).

[Anderson2012-10] Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).

[Hohle2010-11] Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).

[Kervella2004-12] Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).

[Gulati1989-13] Cite error: The named reference Gulati1989 was invoked but never defined (see the help page).

[Brown1997-14] Cite error: The named reference Brown1997 was invoked but never defined (see the help page).

[Tetzlaff2011-15] Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).

[Gould1879-16] Cite error: The named reference Gould1879 was invoked but never defined (see the help page).

[SIMBAD-17] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[Gontcharov2017-18] Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).

[CDS-19] Cite error: The named reference CDS was invoked but never defined (see the help page).

[Jaschek1964-20] Cite error: The named reference Jaschek1964 was invoked but never defined (see the help page).

[Vogt1979-21] Cite error: The named reference Vogt1979 was invoked but never defined (see the help page).

[Renson1980-22] Cite error: The named reference Renson1980 was invoked but never defined (see the help page).

[Kholopov1981-23] Cite error: The named reference Kholopov1981 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of V692 CrA (circled)
Constellation	Corona Australis
Right ascension	18^h 13^m 12.69843^s^[1]
Declination	−41° 20′ 09.9972″^[1]
Apparent magnitude (V)	5.46^[2] (5.46 - 5.51)^[3]
Characteristics
Spectral type	B2 III^[4] or B1.5 IIIp^[5]
B−V color index	−0.17^[6]
Variable type	SX Arietis^[7]
Astrometry

Radial velocity (R_v)	−15.3±2.8^[8] km/s
Proper motion (μ)	RA: −2.050 mas/yr^[1] Dec.: −6.210 mas/yr^[1]
Parallax (π)	1.7423 ± 0.0977 mas^[1]
Distance	1,900 ± 100 ly (570 ± 30 pc)
Absolute magnitude (M_V)	−6.44^[9] or −2.26^[10]

Details

Mass	7.35±0.48^[11] `M`_☉
Radius	12.6±0.7^[12] `R`_☉
Luminosity (bolometric)	4,181^[11] `L`_☉
Surface gravity (log g)	3.52^+0.33 _−0.14^[1] cgs
Temperature	17,061^+1,474 _−1,357^[13] K
Rotational velocity (v sin i)	212±9^[14] km/s
Age	31.6±5.1^[15] Myr

Other designations
3 G. Corona Australis[16], V692 CrA, CD−41°12534, CPD−41°8620, GC 24824, HD 166596, HIP 89290, HR 6804, SAO 228815^[17]
Database references
SIMBAD	data

V692 Coronae Australis information

and 4 Related for: V692 Coronae Australis information

V692 Coronae Australis

Zeta Coronae Australis

SX Arietis variable

List of stars in Corona Australis