Gliese 445

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Template:Short description Template:Sky

Gliese 445
File:PIA17461 Heading toward Gliese 445 (annotated).jpg
Image of AC +79 3888 (circled), also known as Gliese 445, located 17.1 light-years from Earth
Credit: Caltech/Palomar
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Camelopardalis[1]
Right ascension Template:RA[2]
Declination Template:DEC[2]
Apparent magnitude (V) 10.80[3]
Characteristics
Evolutionary stage main sequence[4]
Spectral type M4.0Ve[4]
B−V Template:Engvar 1.572[3]
Astrometry
Radial velocity (Rv)Script error: No such module "val".[2] km/s
Proper motion (μ) RA: 748.418 mas/yr[2]
Dec.: 480.804 mas/yr[2]
Parallax (π)190.3251±0.0194 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)12.227[5]
Details
MassScript error: No such module "val".[6] Template:Solar mass
RadiusScript error: No such module "val".[6] Template:Solar radius
Luminosity0.008[7] Template:Solar luminosity
Surface gravity (log g)4.72[7] cgs
TemperatureScript error: No such module "val".[6] K
Metallicity [Fe/H]Script error: No such module "val".[5] dex
Rotational velocity (v sin i)<2.5[8] km/s
Metallicity [Fe/H]{{{metal_fe2}}} dex
Other designations
Template:Odlist[9]
Database references
SIMBADdata
ARICNSdata
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Gliese 445 (Gl 445 or AC +79 3888) is an M-type main sequence star in the northern part of the constellation Camelopardalis.

Location

File:Near-stars-past-future-en.svg
Distances of the nearest stars from 20,000 years ago until 80,000 years in the future

Gliese 445 is currently 17.1 light-years from Earth and has an apparent magnitude of 10.8. It is visible all night long from locations north of the Tropic of Cancer, but not to the naked eye.[10] Because the star is a red dwarf with a mass only a quarter to a third of that of the Sun, scientists question the ability of this system to support life.[10] Gliese 445 is also a known X-ray source.[11]

The Voyager 1 probe will pass within 1.6 light-years of Gliese 445 in about 40,000 years.[12]

Solar encounter

While the Voyager probe moves through space towards a 1.6-light-year minimum distance from Gliese 445, the star is rapidly approaching the Sun. At the time the probe passes Gliese 445, the star will be about 1.059 parsecs (3.45 light-years) from the Sun,[13] but with less than half the brightness necessary to be seen with the naked eye.[10] At that time, Gliese 445 will be approximately tied with Ross 248 for being the closest star to the Sun (see List of nearest stars and brown dwarfs#Distant future and past encounters).

See also

References

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  1. ↑ Template:Cite constellation
  2. ↑ a b c d e Template:Cite Gaia DR3
  3. ↑ a b Script error: No such module "Citation/CS1".
  4. ↑ a b Script error: No such module "Citation/CS1".
  5. ↑ a b Script error: No such module "Citation/CS1".
  6. ↑ a b c Script error: No such module "Citation/CS1".
  7. ↑ a b Script error: No such module "Citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1".
  9. ↑ Template:Cite simbad
  10. ↑ a b c Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "Citation/CS1".

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External links

Template:Nearest systems Template:Stars of Camelopardalis Template:Portal bar

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