蝘蜓座DI

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	; 顯示被雲氣環繞的蝘蜓座DI A和B的影像。; 事實上，每一個都是更接近的聯星。
觀測資料; 曆元 J2000
星座	蝘蜓座
星官
赤經	11h 07m 20.72163s
赤緯	−77° 38′ 07.2903″
視星等（V）	10.655
特性
光谱分类	G0e
U−B 色指数	+0.630
B−V 色指数	+1.144
变星类型	金牛座T
天体测定
自行 (μ)	赤经：−24.61 mas/yr ; 赤纬：3.45 mas/yr
视差 (π)	4.49 ± 1.59 mas
距离	approx. 700 ly ; (approx. 220 pc)
詳細資料
Aa
質量	1.7 M☉
半徑	2.00 R☉
亮度	4.7 L☉
溫度	6,030 K
年齡	7.1 Myr
Ba/Bb
質量	0.18 M☉
半徑	1.13 R☉
亮度	0.11 L☉
溫度	3,130 K
年齡	3.0 Myr
其他命名
	DI Cha、HIP 54365、 CD−76°486、WDS J11073-7738、美國變星觀測者協會 1104-77
參考資料庫
SIMBAD	资料

蝘蜓座DI，也稱為Hen 3-593或HIP 54365，是在蝘蜓座的一個四重星恆星系統。這個系統與地球的距離大約是700光年。

蝘蜓座DI是一顆金牛座T型變星，是正接近主序帶的初期恆星體。它的視星等不穩定，在10.65 和10.74等之間變化著^[4]。儘管它在視覺上很黯淡，但它之所以被注意到，是因為它的光譜中有明顯的發射^[6]。

在1977年，蝘蜓座DI被發現有一個更微弱的同伴^[7]。後來測得的分離距離為4.6"，大約644AU^[8]。伴星B被發現是一對相距僅0.066"（約10AU）的恆星^[9]，這兩顆恆星的光譜類型都是M5.5 ^[10]。最後，人們發現這顆變得主星有一個距離0.2"（約30AU）的微弱伴星，光譜類型為M6^[10]。

參考資料

^ ^1.0 ^1.1 ^1.2 ^1.3 ^1.4 Van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.
^ ^2.0 ^2.1 ^2.2 Kilkenny, D.; Whittet, D. C. B.; Davies, J. K.; Evans, A.; Bode, M. F.; Robson, E. I.; Banfield, R. M. 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). 1985, 9: 55. Bibcode:1985SAAOC...9...55K.
^ Torres, C. A. O.; Quast, G. R.; Da Silva, L.; de la Reza, R.; Melo, C. H. F.; Sterzik, M. Search for associations containing young stars (SACY). I. Sample and searching method. Astronomy and Astrophysics. 2006, 460 (3): 695. Bibcode:2006A&A...460..695T. S2CID 16080025. arXiv:astro-ph/0609258 . doi:10.1051/0004-6361:20065602.
^ ^4.0 ^4.1 Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1. Bibcode:2009yCat....102025S.
^ Daemgen, S.; Petr-Gotzens, M. G.; Correia, S.; Teixeira, P. S.; Brandner, W.; Kley, W.; Zinnecker, H. Protoplanetary disk evolution and stellar parameters of T Tauri binaries in Chamaeleon I. Astronomy & Astrophysics. 2013, 554: A43. Bibcode:2013A&A...554A..43D. S2CID 59440639. arXiv:1304.1150 . doi:10.1051/0004-6361/201321220.
^ Henize, Karl G. Emission-Line Stars in an Obscured Region in Chamaeleon. Astronomical Journal. 1963, 68: 280. Bibcode:1963AJ.....68S.280H. doi:10.1086/109141.
^ Schwartz, R. D. A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars. Astrophysical Journal Supplement Series. 1977, 35: 161. Bibcode:1977ApJS...35..161S. doi:10.1086/190473.
^ Reipurth, Bo; Zinnecker, Hans. Visual binaries among pre-main sequence stars. Astronomy and Astrophysics. 1993, 278: 81. Bibcode:1993A&A...278...81R.
^ Lafrenière, David; Jayawardhana, Ray; Brandeker, Alexis; Ahmic, Mirza; Van Kerkwijk, Marten H. A Multiplicity Census of Young Stars in Chamaeleon I. The Astrophysical Journal. 2008, 683 (2): 844–861. Bibcode:2008ApJ...683..844L. S2CID 2998049. arXiv:0803.0561 . doi:10.1086/590239.
^ ^10.0 ^10.1 Schmidt, T. O. B.; Vogt, N.; Neuhäuser, R.; Bedalov, A.; Roell, T. 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. 2013, 557: A80. Bibcode:2013A&A...557A..80S. S2CID 67802847. arXiv:1307.1082 . doi:10.1051/0004-6361/201220660.

[hipparcos-1] 1.0 ^1.1 ^1.2 ^1.3 ^1.4 Van Leeuwen, F. Validation of the new Hipparcos reduction. Astronomy and Astrophysics. 2007, 474 (2): 653–664. Bibcode:2007A&A...474..653V. S2CID 18759600. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357.

[kilkenny-2] 2.0 ^2.1 ^2.2 Kilkenny, D.; Whittet, D. C. B.; Davies, J. K.; Evans, A.; Bode, M. F.; Robson, E. I.; Banfield, R. M. 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). 1985, 9: 55. Bibcode:1985SAAOC...9...55K.

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

[gcvs-4] 4.0 ^4.1 Samus, N. N.; Durlevich, O. V.; et al. VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013). VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S. 2009, 1. Bibcode:2009yCat....102025S.

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

[henize-6] Henize, Karl G. Emission-Line Stars in an Obscured Region in Chamaeleon. Astronomical Journal. 1963, 68: 280. Bibcode:1963AJ.....68S.280H. doi:10.1086/109141.

[schwartz-7] Schwartz, R. D. A survey of southern dark clouds for Herbig-Haro objects and H-alpha emission stars. Astrophysical Journal Supplement Series. 1977, 35: 161. Bibcode:1977ApJS...35..161S. doi:10.1086/190473.

[reipurth-8] Reipurth, Bo; Zinnecker, Hans. Visual binaries among pre-main sequence stars. Astronomy and Astrophysics. 1993, 278: 81. Bibcode:1993A&A...278...81R.

[lafreniere-9] Lafrenière, David; Jayawardhana, Ray; Brandeker, Alexis; Ahmic, Mirza; Van Kerkwijk, Marten H. A Multiplicity Census of Young Stars in Chamaeleon I. The Astrophysical Journal. 2008, 683 (2): 844–861. Bibcode:2008ApJ...683..844L. S2CID 2998049. arXiv:0803.0561 . doi:10.1086/590239.

[schmidt-10] 10.0 ^10.1 Schmidt, T. O. B.; Vogt, N.; Neuhäuser, R.; Bedalov, A.; Roell, T. 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. 2013, 557: A80. Bibcode:2013A&A...557A..80S. S2CID 67802847. arXiv:1307.1082 . doi:10.1051/0004-6361/201220660.

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