SCR 1845−6357

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SCR 1845−6357
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Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pavo
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 17.4[2]
Characteristics
SCR 1845−6357A
Spectral type M8.5[3]
SCR 1845−6357B
Spectral type T6[3]
Apparent magnitude (J) 13.26[4]
Astrometry
Proper motion (μ) RA: 2583.190 mas/yr[1]
Dec.: 588.504 mas/yr[1]
Parallax (π)249.6651±0.1330 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Details
SCR 1845−6357A
MassTemplate:Val[5] Template:Solar mass
RadiusTemplate:Val[5] Template:Solar radius
LuminosityTemplate:Val[5] Template:Solar luminosity
Surface gravity (log g)5.0[5] cgs
Temperature2,400[5] K
SCR 1845−6357B
Mass0.024 to 0.062[6] Template:Solar mass
Mass25 to 65[6] MJup
RadiusTemplate:Val[6] RJup
LuminosityTemplate:Val[6] Template:Solar luminosity
Surface gravity (log g)5.1[3] cgs
TemperatureTemplate:Val[6] K
Metallicity [Fe/H]{{{metal_fe2}}} dex
Age≥1.5[6] Gyr
Other designations
Template:Odlist,[2] SCR 1845[3]
Database references
SIMBADA
B

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SCR 1845−6357 is a binary system, Template:Convert away in the constellation Pavo. The primary is a low-mass red dwarf, while the secondary is a brown dwarf. It is among the nearest stars, as well as the nearest red dwarf-brown dwarf binary.

System

File:SCR 1845-6357 comparison.png
Size comparison of SCR 1845-6357 A and B, compared to Solar System objects

The primary, SCR 1845−6357A, is an ultra-cool red dwarf, one of the smallest and coolest stars so far discovered, with a mass of about 7% of the Sun's, a radius 9.4% of the Sun's, and an effective temperature of Template:Cvt.[5] It is very faint, at an apparent magnitude of 17.4[2] due to its low luminosity, equivalent to 0.03% of the Sun's luminosity across all wavelengths.[6] It was discovered in 2004 by the SuperCOSMOS survey.[7]

This star has been found to have a brown dwarf companion in 2006, designated Template:Nobr.[8] The companion has an observed distance of 4.1 AU from the primary and is classified as a T-dwarf.[3] It is estimated to have 25 to 65 times the mass of Jupiter (2.4 to 6.2% of the Sun's mass), but its radius is 30% smaller than that of Jupiter, about 50,000 km (Template:Convert miles). It has an effective temperature around Template:Cvt.[6]

Gallery

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See also

References

Template:Reflist

External links

Template:Nearest systems Template:Stars of Pavo

  1. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR3
  2. ↑ a b c Cite error: Invalid <ref> tag; no text was provided for refs named sb
  3. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named kasper
  4. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named DwarfArchives
  5. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named carmenes-v
  6. ↑ a b c d e f g h Cite error: Invalid <ref> tag; no text was provided for refs named Vigan2012
  7. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Hambly2004
  8. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Biller2006
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