Iota Crucis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Crux |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.69[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B Template:Engvar | +0.93[4] |
| B−V Template:Engvar | +1.05[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[5] km/s |
| Proper motion (μ) | RA: +112.266 mas/yr[1] Dec.: −65.641 mas/yr[1] |
| Parallax (π) | 26.1753±0.0952 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | +1.86[2] |
| Details[6] | |
| ι Cru A | |
| Mass | Script error: No such module "val". Template:Solar mass |
| Radius | Script error: No such module "val". Template:Solar radius |
| Luminosity | Script error: No such module "val". Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val". cgs |
| Temperature | Script error: No such module "val". K |
| Metallicity [Fe/H] | Script error: No such module "val". dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
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ι Crucis, Latinized as Iota Crucis, is a star in the southern constellation of Crux.[7] It is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4m.69.[2] This object is located 125 light-years from the Sun, based on parallax, and is drifting further away with a radial velocity of +7.5 km/s.[5]
This is an aging giant star with a stellar classification of K0 III.[3] It has 1.45 times the mass of the Sun. Having exhausted the supply of hydrogen at its core, the star has cooled and expanded off the main sequence, and now has 6.57 times the radius of the Sun. It is radiating 20.9 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,815 K.[6]
There is a magnitude 10.24 star at an angular separation of Script error: No such module "val". from the primary, along a position angle of 2° as of 2015. The Washington Double Star Catalog (2001) notes this is an "optical pair, based on study of relative motion of the components,"[8] whereas Eggleton and Tokovinin (2008) list it as a binary system.[9] However, astrometric measurements by the Gaia spacecraft confirm the companion is not gravitationally bound, with a measured parallax of Script error: No such module "val". implying a distance around Template:Cvt, as well as radically different proper motions.[10]
References
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- ↑ a b c d Template:Cite DR3
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- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Template:Cite DR2
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:Cite DR3
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