Alpha Apodis
Template:Location mark Location of α Apodis (circled) | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 3.83[2] |
| Characteristics | |
| Spectral type | K3IIICN0.5[3] |
| U−B Template:Engvar | +1.68[2] |
| B−V Template:Engvar | +1.43[2] |
| R−I Template:Engvar | +0.53[4] |
| Astrometry | |
| Radial velocity (Rv) | −1.1[5] km/s |
| Proper motion (μ) | RA: −5.133 mas/yr[1] Dec.: −16.299 mas/yr[1] |
| Parallax (π) | 6.5509±0.1133 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | −1.67[6] |
| Details | |
| Mass | Script error: No such module "val".[7] Template:Solar mass |
| Radius | Script error: No such module "val".[7] Template:Solar radius calculator[8]Template:Efn Template:Solar radius |
| Luminosity | 1,072±22[8] Template:Solar luminosity |
| Temperature | 4,090±80[8] K |
| Metallicity [Fe/H] | −0.3[8] dex |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[9] | |
| Database references | |
| SIMBAD | data |
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Alpha Apodis, also named Paradys,[10] is the brightest star in the southern circumpolar constellation of Apus. It had the Greek alpha designation as part of the constellation which Johann Bayer called Apis Indica in his 1603 Uranometria star atlas.[11] This identifier is a Bayer designation that is Latinied from α Apodis, and abbreviated Alpha Aps or α Aps, respectively. The star has an apparent visual magnitude of approximately 3.825,[12] which can be viewed with the naked eye. With a declination of –79°, this is a circumpolar star for much of the southern hemisphere. It can be identified on the night sky by drawing an imaginary line through Alpha Centauri and Alpha Circini then extending it toward the south celestial pole.[13]
This is a giant star with a stellar classification of K3IIICN0.5,[3] indicating that this star has consumed the hydrogen at its core and has evolved away from the main sequence. The CN0.5 notation indicates a mild overabundance of the cyanide (CN) molecule. The star has expanded to an estimated radius of about 65 times the radius of the Sun and is emitting 1,000 times the Sun's luminosity. The photosphere has an effective temperature of 4,090 K,[8] giving the star the characteristic orange hue of a K-type star.[14] Based upon parallax measurements, this star is Script error: No such module "val". from the Earth.[1] It is not known to have a companion.[15]
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 α Apodis, ζ Apodis, ι Apodis, β Apodis, γ Apodis, δ Octantis, δ1 Apodis, η Apodis, and ε Apodis. Consequently, α Apodis itself is known as Script error: No such module "Lang". (Script error: No such module "Lang"., Template:Langx.)[16]
Paradys-vogel was the original Dutch name for the constellation Apus, which represents a bird-of-paradise.[11] The IAU Working Group on Star Names approved the name Paradys for this star on 18 May 2025 and it is now so entered in the IAU Catalog of Star Names.[10]
Notes
References
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- ↑ a b c d e Template:Cite Gaia EDR3
- ↑ a b c Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ HR 5470, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed online October 3, 2008.
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b c d e Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ a b Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ 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
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