  | |
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 15h 39m 18.39712s [1] |
| Declination | −77° 55′ 04.8196″ [1] |
| Apparent magnitude (V) | 6.18±0.01 [2] |
| Characteristics | |
| Evolutionary stage | horizontal branch [3] |
| Spectral type | K2.5 IIIb CN1.5 Ba+0.5 [4] |
| U−B color index | +1.36 [5] |
| B−V color index | +1.21 [5] |
| Astrometry | |
| Radial velocity (Rv) | +13.1 [6] km/s |
| Proper motion (μ) |
RA: −79.376
mas/
yr
[1] Dec.: −130.969 mas/ yr [1] |
| Parallax (π) | 9.0832 ± 0.0204 mas [1] |
| Distance | 359.1 ± 0.8
ly (110.1 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.21 [7] |
| Details | |
| Mass | 1.59 [8] M☉ |
| Radius | 13±0.7 [9] R☉ |
| Luminosity | 52.5+2.5 −2.4 [10] L☉ |
| Surface gravity (log g) | 2.71 [8] cgs |
| Temperature | 4,672±100 [11] K |
| Metallicity [Fe/H] | −0.04 [8] dex |
| Rotational velocity (v sin i) | 5.2±4.3 [12] km/s |
| Age | 2.78+0.37 −0.52 [1] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 138289, also known as HR 5757, is a probable spectroscopic binary [12] located in the constellation Apus, the bird-of-paradise. It has an apparent magnitude of 6.18, [2] placing it near the limit for naked eye. Gaia DR3 parallax measurements place the object 359 light years away [1] and it is currently receding with a heliocentric radial velocity of 13.1 km/s. [6] At its current distance, HD 138289's brightness is diminished by 0.25 magnitudes due to extinction from interstellar dust. [15] It has an absolute magnitude of +1.21. [7]
The visible component has a stellar classification of K2.5 IIIb CN1.5 Ba+0.5, [4] indicating that it is a red giant with an anomalous overabundance of cyano radicals in its spectrum. The IIIb luminosity class indicates that it is a lower luminosity giant star. The Ba+0.5 suffix states that it is a mild barium star, whose barium abundance might have come from a hidden white dwarf companion. HD 138289 is estimated to be 2.8 billion years old, [1] enough time for it to cool and expand to 13 times the radius of the Sun. [9] It is now on the horizontal branch, [3] fusing helium at its core. At present it has 1.59 times the mass of the Sun and radiates 52.5 times the luminosity of the Sun [10] from its enlarged photosphere at an effective temperature of 4,672 K. [11] HD 138289 has a near solar metallicity and spins modestly with a poorly constrained projected rotational velocity of 5.2 km/s. [12]
- ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN 0004-6361.
- ^ a b Laney, C. D.; Joner, M. D.; Pietrzyński, G. (11 November 2011). "A new Large Magellanic Cloud K-band distance from precision measurements of nearby red clump stars". Monthly Notices of the Royal Astronomical Society. 419 (2): 1637–1641. arXiv: 1109.4800. Bibcode: 2012MNRAS.419.1637L. doi: 10.1111/j.1365-2966.2011.19826.x. ISSN 0035-8711.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (October 1989). "The Perkins catalog of revised MK types for the cooler stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode: 1989ApJS...71..245K. doi: 10.1086/191373. eISSN 1538-4365. ISSN 0067-0049.
- ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode: 1966CoLPL...4...99J.
- ^ a b Evans, David S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode: 1967IAUS...30...57E
- ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ a b c Liu, Y. J.; Zhao, G.; Shi, J. R.; Pietrzyński, G.; Gieren, W. (7 November 2007). "The abundances of nearby red clump giants". Monthly Notices of the Royal Astronomical Society. 382 (2): 553–566. Bibcode: 2007MNRAS.382..553L. doi: 10.1111/j.1365-2966.2007.11852.x. eISSN 1365-2966. ISSN 0035-8711.
- ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180. Bibcode: 2004A&A...426..297K. doi: 10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics. 633: A34. arXiv: 1910.12732. Bibcode: 2020A&A...633A..34C. doi: 10.1051/0004-6361/201936360. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl: 1721.1/124721. S2CID 166227927.
- ^ a b c De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474. Bibcode: 2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361. S2CID 54046583.
- ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
- ^ "HD 138289". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 September 2015.
- ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160. Bibcode: 2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.
| |
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Apus |
| Right ascension | 15h 39m 18.39712s [1] |
| Declination | −77° 55′ 04.8196″ [1] |
| Apparent magnitude (V) | 6.18±0.01 [2] |
| Characteristics | |
| Evolutionary stage | horizontal branch [3] |
| Spectral type | K2.5 IIIb CN1.5 Ba+0.5 [4] |
| U−B color index | +1.36 [5] |
| B−V color index | +1.21 [5] |
| Astrometry | |
| Radial velocity (Rv) | +13.1 [6] km/s |
| Proper motion (μ) |
RA: −79.376
mas/
yr
[1] Dec.: −130.969 mas/ yr [1] |
| Parallax (π) | 9.0832 ± 0.0204 mas [1] |
| Distance | 359.1 ± 0.8
ly (110.1 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.21 [7] |
| Details | |
| Mass | 1.59 [8] M☉ |
| Radius | 13±0.7 [9] R☉ |
| Luminosity | 52.5+2.5 −2.4 [10] L☉ |
| Surface gravity (log g) | 2.71 [8] cgs |
| Temperature | 4,672±100 [11] K |
| Metallicity [Fe/H] | −0.04 [8] dex |
| Rotational velocity (v sin i) | 5.2±4.3 [12] km/s |
| Age | 2.78+0.37 −0.52 [1] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 138289, also known as HR 5757, is a probable spectroscopic binary [12] located in the constellation Apus, the bird-of-paradise. It has an apparent magnitude of 6.18, [2] placing it near the limit for naked eye. Gaia DR3 parallax measurements place the object 359 light years away [1] and it is currently receding with a heliocentric radial velocity of 13.1 km/s. [6] At its current distance, HD 138289's brightness is diminished by 0.25 magnitudes due to extinction from interstellar dust. [15] It has an absolute magnitude of +1.21. [7]
The visible component has a stellar classification of K2.5 IIIb CN1.5 Ba+0.5, [4] indicating that it is a red giant with an anomalous overabundance of cyano radicals in its spectrum. The IIIb luminosity class indicates that it is a lower luminosity giant star. The Ba+0.5 suffix states that it is a mild barium star, whose barium abundance might have come from a hidden white dwarf companion. HD 138289 is estimated to be 2.8 billion years old, [1] enough time for it to cool and expand to 13 times the radius of the Sun. [9] It is now on the horizontal branch, [3] fusing helium at its core. At present it has 1.59 times the mass of the Sun and radiates 52.5 times the luminosity of the Sun [10] from its enlarged photosphere at an effective temperature of 4,672 K. [11] HD 138289 has a near solar metallicity and spins modestly with a poorly constrained projected rotational velocity of 5.2 km/s. [12]
- ^ a b c d e f g Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211. Bibcode: 2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN 0004-6361.
- ^ a b Laney, C. D.; Joner, M. D.; Pietrzyński, G. (11 November 2011). "A new Large Magellanic Cloud K-band distance from precision measurements of nearby red clump stars". Monthly Notices of the Royal Astronomical Society. 419 (2): 1637–1641. arXiv: 1109.4800. Bibcode: 2012MNRAS.419.1637L. doi: 10.1111/j.1365-2966.2011.19826.x. ISSN 0035-8711.
- ^ a b Keenan, Philip C.; McNeil, Raymond C. (October 1989). "The Perkins catalog of revised MK types for the cooler stars". The Astrophysical Journal Supplement Series. 71: 245. Bibcode: 1989ApJS...71..245K. doi: 10.1086/191373. eISSN 1538-4365. ISSN 0067-0049.
- ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode: 1966CoLPL...4...99J.
- ^ a b Evans, David S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode: 1967IAUS...30...57E
- ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ a b c Liu, Y. J.; Zhao, G.; Shi, J. R.; Pietrzyński, G.; Gieren, W. (7 November 2007). "The abundances of nearby red clump giants". Monthly Notices of the Royal Astronomical Society. 382 (2): 553–566. Bibcode: 2007MNRAS.382..553L. doi: 10.1111/j.1365-2966.2007.11852.x. eISSN 1365-2966. ISSN 0035-8711.
- ^ a b Kervella, P.; Thévenin, F.; Di Folco, E.; Ségransan, D. (October 2004). "The angular sizes of dwarf stars and subgiants". Astronomy & Astrophysics. 426 (1): 297–307. arXiv: astro-ph/0404180. Bibcode: 2004A&A...426..297K. doi: 10.1051/0004-6361:20035930. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics. 633: A34. arXiv: 1910.12732. Bibcode: 2020A&A...633A..34C. doi: 10.1051/0004-6361/201936360. eISSN 1432-0746. ISSN 0004-6361.
- ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. eISSN 1538-3881. hdl: 1721.1/124721. S2CID 166227927.
- ^ a b c De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars V: Southern stars". Astronomy & Astrophysics. 561: A126. arXiv: 1312.3474. Bibcode: 2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762. eISSN 1432-0746. ISSN 0004-6361. S2CID 54046583.
- ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
- ^ "HD 138289". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 September 2015.
- ^ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160. Bibcode: 2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219. eISSN 1365-2966. ISSN 0035-8711.