Delta Octantis
Template:Location mark Location of δ Octantis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Octans |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 4.31[2] |
| Characteristics | |
| Spectral type | K2III[3] |
| U−B Template:Engvar | +1.45[4] |
| B−V Template:Engvar | +1.31[4] |
| Astrometry | |
| Radial velocity (Rv) | +4.60[5] km/s |
| Proper motion (μ) | RA: −96.12[1] mas/yr Dec.: −13.27[1] mas/yr |
| Parallax (π) | 10.91±0.14 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | Script error: No such module "val".[6] |
| Details | |
| Mass | 1.06[5] Template:Solar mass |
| Radius | 24.61[5] Template:Solar radius |
| Luminosity | 271[2] Template:Solar luminosity |
| Surface gravity (log g) | 1.89[5] cgs |
| Temperature | 4,311[5] K |
| Metallicity [Fe/H] | −0.42[5] dex |
| Rotational velocity (v sin i) | 1.1[7] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| CD−83°189, GC 19349, HIP 70638, HR 5339, HD 124882, NSV 6636, SAO 258698 | |
| Database references | |
| SIMBAD | data |
Script error: No such module "Check for unknown parameters".
δ Octantis, Latinised as Delta Octantis, has the distinction of being Saturn's southern pole star.[8] An orange giant of class K2III,[3] it has 1.2 times the mass of the Sun and about 25 times the Sun's radius. This star is about 4.3 billion years old, which is similar to the age of the Sun.[6]
Naming
In Chinese caused by adaptation of the European southern hemisphere constellations into the Chinese system, Script error: No such module "Lang". (Script error: No such module "Lang".), meaning Exotic Bird, refers to an asterism consisting of δ Octantis, ζ Apodis, ι Apodis, β Apodis, γ Apodis, δ1 Apodis, η Apodis, α Apodis and ε Apodis. Consequently, δ Octantis itself is known as Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx).[9]
References
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- ↑ a b c d e Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".Vizier catalog entry
- ↑ a b c d e f Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ Script error: No such module "citation/CS1".
- ↑ Template:In lang AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 29 日 Template:Webarchive
Script error: No such module "Check for unknown parameters".