DI Chamaeleontis

	DI Chamaeleontis
Observationsdata; Epok: J2000.0
Stjärnbild	Kameleonten
Rektascension	11t 07m 20,72761s
Deklination	-77° 38′ 07,3081″
Skenbar magnitud ()	+10,72
Stjärntyp
Spektraltyp	G0e (G2 + M6 + M5.5 + M5.5)
U–B	+0,630
B–V	+1,144
Variabeltyp	T Tauri-stjärna
Astrometri
Radialhastighet ()	+12,040 ± 0,140 km/s
Egenrörelse (µ)	RA: -22,552 mas/år; Dek.: +1,214 mas/år
Parallax ()	5,2913 ± 0,0133
Avstånd	616 ± 2 lå (189,0 ± 0,5 pc)
Detaljer
Massa	1,7 M☉
Radie	2,00 R☉
Luminositet	4,7 L☉
Temperatur	6 030 K
Ålder	7,1 miljoner år
Andra beteckningar
	CD-76 486, AAVSO 1104-77, AKARI-IRC-V1 J1107207-773807, CPD-76 652, 2E 2399, GSC 09414-00743, HIC 54365, HIP 54365, IRAS 11059-7721, 2MASS J11072074-7738073, NSV 5099, RAVE J110720.7-773807, 1RXS J110717.6-773817, TYC 9414-743-1, UCAC2 500047, UCAC3 25-23410, UCAC4 062-010408, uvby98 610300245, DI Chamaeleontis, WDS J11073-7738AB, WDS J11073-7738A, WDS J11073-7738Aa,Ab, WISEA J110720.70-773807.4, WISE J110720.68-773807.3, Gaia DR3 5201129121134048768, Gaia DR2 5201129121134048768, Gaia DR1 5201129116838179328

DI Chamaeleontis, även känd som Hen 3-593 eller HIP 54365, är ett fyrfaldigt stjärnsystem i stjärnbilden Kameleonten, beräknas vara beläget 616 ljusår från solen baserat på Gaia DR3 -parallaxmätningar. Det rör sig bort från solsystemet med en heliocentrisk radialhastighet av ca 12 km/sek.

DI Chamaeleontis är en variabel stjärna av T Tauri-typ, unga stjärnobjekt som precis närmar sig huvudserien. Den varierar oregelbundet mellan skenbar magnitud 10,65 och 10,74. Även om den är visuellt svag, märktes den på grund av de framträdande emissionslinjerna i dess spektrum.

År 1977 observerades DI Chamaeleontis ha en mycket svagare följeslagare. Separationen mättes senare till 4,6 bågsekunder, ungefär 644 astronomiska enheter (AE). B-komponenten upptäcktes vara en snäv dubbelstjärna separerad med endast 0,066 bågsekund, cirka 10 AE, båda av spektraltyp M5.5. Slutligen fann man att den variabla primärstjärnan hade en svag följeslagare separerad med 0,2 bågsekund (ca 30 AE), av spektraltyp M6.

Referenser

Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, DI Chamaeleontis, 28 december 2025.

Noter

1 2 3 4 5 6 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.
↑ Tokovinin, Andrei (2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5.
↑ Torres, C. A. O.; Quast, G. R.; Da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. (2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. S2CID 16080025.
1 2 3 Schmidt, T. O. B.; Vogt, N.; Neuhäuser, R.; Bedalov, A.; Roell, T. (2013). "New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Hα 5 in the Chamaeleon I star-forming region". Astronomy & Astrophysics. 557: A80. arXiv:1307.1082. Bibcode:2013A&A...557A..80S. doi:10.1051/0004-6361/201220660. S2CID 67802847.
1 2 Kilkenny, D.; Whittet, D. C. B.; Davies, J. K.; Evans, A.; Bode, M. F.; Robson, E. I.; Banfield, R. M. (1985). "Optical and infrared photometry of southern early-type shell stars and pre-main-sequence variables". In Its South African Astronomical Observatory Circular No. 9 P 55-86 (SEE N86-18271 08-89). 9: 55. Bibcode:1985SAAOC...9...55K.
1 2 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.
1 2 Nguyen, Duy Cuong; Brandeker, Alexis; van Kerkwijk, Marten H.; Jayawardhana, Ray (February 2012). "Close Companions to Young Stars. I. A Large Spectroscopic Survey in Chamaeleon I and Taurus-Auriga". The Astrophysical Journal. 745 (2): 25. arXiv:1112.0002. Bibcode:2012ApJ...745..119N. doi:10.1088/0004-637X/745/2/119. S2CID 119265730. 119.
1 2 3 4 5 Daemgen, S.; Petr-Gotzens, M. G.; Correia, S.; Teixeira, P. S.; Brandner, W.; Kley, W.; Zinnecker, H. (2013). "Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I". Astronomy & Astrophysics. 554: A43. arXiv:1304.1150. Bibcode:2013A&A...554A..43D. doi:10.1051/0004-6361/201321220. S2CID 59440639.
↑ https://simbad.cds.unistra.fr/simbad/sim-id?Ident=DI+Char ^{[död länk]}. Hämtad 2026-01-02.
↑ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Hämtad 27 August 2024.
↑ Henize, Karl G. (1963). "Emission-Line Stars in an Obscured Region in Chamaeleon". Astronomical Journal. 68: 280. Bibcode:1963AJ.....68S.280H. doi:10.1086/109141.
↑ Schwartz, R. D. (1977). "A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars". Astrophysical Journal Supplement Series. 35: 161. Bibcode:1977ApJS...35..161S. doi:10.1086/190473.
↑ Reipurth, Bo; Zinnecker, Hans (1993). "Visual binaries among pre-main sequence stars". Astronomy and Astrophysics. 278: 81. Bibcode:1993A&A...278...81R.
↑ Lafrenière, David; Jayawardhana, Ray; Brandeker, Alexis; Ahmic, Mirza; Van Kerkwijk, Marten H. (2008). "A Multiplicity Census of Young Stars in Chamaeleon I". The Astrophysical Journal. 683 (2): 844–861. arXiv:0803.0561. Bibcode:2008ApJ...683..844L. doi:10.1086/590239. S2CID 2998049.

[A-1] 1 2 3 4 5 6 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.

[B-2] Tokovinin, Andrei (2018). "The Updated Multiple Star Catalog". The Astrophysical Journal Supplement Series. 235 (1): 6. arXiv:1712.04750. Bibcode:2018ApJS..235....6T. doi:10.3847/1538-4365/aaa1a5.

[D-3] Torres, C. A. O.; Quast, G. R.; Da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. (2006). "Search for associations containing young stars (SACY). I. Sample and searching method". Astronomy and Astrophysics. 460 (3): 695. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. S2CID 16080025.

[E-4] 1 2 3 Schmidt, T. O. B.; Vogt, N.; Neuhäuser, R.; Bedalov, A.; Roell, T. (2013). "New companions in the stellar systems of DI Cha, Sz 22, CHXR 32, and Cha Hα 5 in the Chamaeleon I star-forming region". Astronomy & Astrophysics. 557: A80. arXiv:1307.1082. Bibcode:2013A&A...557A..80S. doi:10.1051/0004-6361/201220660. S2CID 67802847.

[F-5] 1 2 Kilkenny, D.; Whittet, D. C. B.; Davies, J. K.; Evans, A.; Bode, M. F.; Robson, E. I.; Banfield, R. M. (1985). "Optical and infrared photometry of southern early-type shell stars and pre-main-sequence variables". In Its South African Astronomical Observatory Circular No. 9 P 55-86 (SEE N86-18271 08-89). 9: 55. Bibcode:1985SAAOC...9...55K.

[G-6] 1 2 Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 1. Bibcode:2009yCat....102025S.

[H-7] 1 2 Nguyen, Duy Cuong; Brandeker, Alexis; van Kerkwijk, Marten H.; Jayawardhana, Ray (February 2012). "Close Companions to Young Stars. I. A Large Spectroscopic Survey in Chamaeleon I and Taurus-Auriga". The Astrophysical Journal. 745 (2): 25. arXiv:1112.0002. Bibcode:2012ApJ...745..119N. doi:10.1088/0004-637X/745/2/119. S2CID 119265730. 119.

[J-8] 1 2 3 4 5 Daemgen, S.; Petr-Gotzens, M. G.; Correia, S.; Teixeira, P. S.; Brandner, W.; Kley, W.; Zinnecker, H. (2013). "Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I". Astronomy & Astrophysics. 554: A43. arXiv:1304.1150. Bibcode:2013A&A...554A..43D. doi:10.1051/0004-6361/201321220. S2CID 59440639.

[SIMBAD-9] ttps://simbad.cds.unistra.fr/simbad/sim-id?Ident=DI+Char ^{[död länk]}. Hämtad 2026-01-02.

[K-10] "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Hämtad 27 August 2024.

[L-11] Henize, Karl G. (1963). "Emission-Line Stars in an Obscured Region in Chamaeleon". Astronomical Journal. 68: 280. Bibcode:1963AJ.....68S.280H. doi:10.1086/109141.

[M-12] Schwartz, R. D. (1977). "A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars". Astrophysical Journal Supplement Series. 35: 161. Bibcode:1977ApJS...35..161S. doi:10.1086/190473.

[N-13] Reipurth, Bo; Zinnecker, Hans (1993). "Visual binaries among pre-main sequence stars". Astronomy and Astrophysics. 278: 81. Bibcode:1993A&A...278...81R.

[O-14] Lafrenière, David; Jayawardhana, Ray; Brandeker, Alexis; Ahmic, Mirza; Van Kerkwijk, Marten H. (2008). "A Multiplicity Census of Young Stars in Chamaeleon I". The Astrophysical Journal. 683 (2): 844–861. arXiv:0803.0561. Bibcode:2008ApJ...683..844L. doi:10.1086/590239. S2CID 2998049.