Lacaille 9352

Coordinates: Sky map 23h 05m 52.03604s, −35° 51′ 11.0475″
Source: Wikipedia, the free encyclopedia.
Lacaille 9352

the neighborhood of the solar system which also includes Lacaille 9352
Observation data
Epoch J2000      Equinox J2000
Constellation Piscis Austrinus
Right ascension 23h 05m 52.03604s[1]
Declination −35° 51′ 11.0475″[1]
Apparent magnitude (V) 7.34[2]
Characteristics
Spectral type M0.5V[3]
U−B color index +1.18[2]
B−V color index +1.50[2]
Variable type Suspected[4]
Distance
10.7241 ± 0.0007 ly
(3.2880 ± 0.0002 pc)
Absolute magnitude (MV)9.8[8]
Details
Gyr
HIP 114046, UGPMF 591[13]
Database references
SIMBADdata
ARICNSdata
Lacaille 9352 is located in the constellation Piscis Austrinus.
Lacaille 9352 is located in the constellation Piscis Austrinus.
Lacaille 9352
Location of Lacaille 9352 in the constellation Piscis Austrinus

Lacaille 9352 (Lac 9352) is a

closest star in the constellation Piscis Austrinus. The ChView simulation[15] shows that its closest neighbour is the EZ Aquarii triple star system at about 4.1 ly
away.

Properties

This star has the fourth highest known

space velocity components of this star are (U, V, W) = (−93.9, −14.1, −51.4) km/s.[18] If the radial velocity (Vr) equals +9.7 km/s then about 2,700 years ago Lacaille 9352 was at its minimal distance of approximately 10.63 ly (3.26 pc) from the Sun.[19]

The

spectrum of Lacaille 9352 places it at a stellar classification of M0.5V,[3] indicating it is a type of main sequence star known as a red dwarf. This was the first red dwarf star to have its angular diameter measured,[20] with the physical diameter being about 47% of the Sun's radius.[9] It has around half the mass of the Sun[3] and the outer envelope has an effective temperature of about 3,670 K.[9]

Planetary system

In June 2020, two

HIRES in Hawaii.[21][22]

The Lacaille 9352 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b ≥ 4.2±0.6 M🜨 0.068±0.002 9.262±0.001 0.09+0.09
−0.06 		— —
c ≥ 7.6±1.2 M🜨 0.120±0.004 21.789+0.004
−0.005 		0.22+0.09
−0.10 		— —
d (unconfirmed) ≳ 8.3 M🜨 ~0.21 ~50.7 0.25+0.20
−0.15 		— —

See also

References

  1. ^
    S2CID 18759600
    .
  2. ^
    Bibcode:1973MNSSA..32...11C
    .
  3. ^
    S2CID 14786643
    .
  4. Bibcode:1997A&A...320..865M
    .
  5. ^
    S2CID 16080025
    .
  6. ^
    doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR
    .
  7. doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR
    .
  8. ISBN 0333750888
    . absolute magnitude is 9.8
  9. ^
    S2CID 235435757
    . 40.
  10. S2CID 119189542
    .
  11. S2CID 119530297
    .
  12. S2CID 6302522
    .
  13. Centre de Données astronomiques de Strasbourg
    . Retrieved 2010-01-20.
  14. ^ Research Consortium on Nearby Stars. "The One Hundred Nearest Star Systems". Georgia State University. Archived from the original on 2012-05-13. Retrieved 2010-01-20.
  15. ^ "Solstation and ChView". Retrieved 2010-04-20.
  16. ^ "High Proper Motion Stars in the Hipparcos Catalogue". European Space Agency. July 1, 2007. Retrieved 2010-01-20.
  17. doi:10.1002/asna.18811000104
    .
  18. ^ "ARICNS star page of Lacaille 9352". Astronomisches Rechen-Institut Heidelberg. Archived from the original on 2012-09-16. Retrieved 2010-04-16.
  19. ^ "Annotations on NAME LACAILLE 9352 object". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2010-04-16.
  20. ^ Glindemann, Andreas; Paresce, Francesco. "Giant Eyes for the VLT Interferometer". European Southern Observatory. Retrieved 2010-01-20.
  21. S2CID 220075207
  22. S2CID 220507688
    . Retrieved 2020-06-30.

External links
Retrieved from "https://en.wikipedia.org/w/index.php?title=Lacaille_9352&oldid=1186879217"