NGC 2419又称“星系浪子”,是天猫座最有名的深空天体,估计位于银河系以外,离地27.5至30万光年,是已知距离非常遥远的球状星团,很可能以非常扁平的椭圆轨道围银河系旋转[29]。NGC 2419是夏普力二型星团,亮度10.3视星等,表明星团质量基本集中在中心位置。人类曾误以为NGC 2419是恒星,后经美国天文学家卡尔·兰普兰(Carl Lampland)的发现纠正[30]。
NGC 2537又称熊掌系,在上台增四西北偏北约三度[31],是距地球1700至3000万光年的蓝色致密矮星系。NGC 2537附近的IC 2233螺旋星系非常扁平且薄,离地2600至4000万光年。IC 2233颇为宁静,平均每20年形成的恒星还不足一颗,人类曾长期误以为该系与熊掌系相互影响,但甚大天线阵的观测数据基本排除上述可能,两星系距离相当遥远。[32]
Wagman, Morton. Lost Stars: Lost, Missing and Troublesome Stars from the Catalogues of Johannes Bayer, Nicholas Louis de Lacaille, John Flamsteed, and Sundry Others. Blacksburg, VA: The McDonald & Woodward Publishing Company. 2003. Bibcode:2003lslm.book.....W. ISBN 978-0-939923-78-6.
Ducati, J. R. VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system. CDS/ADC Collection of Electronic Catalogues. 2002, 2237. Bibcode:2002yCat.2237....0D.
Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog. The Astronomical Journal. 2001, 122 (6): 3466. Bibcode:2001AJ....122.3466M. doi:10.1086/323920.
Percy, John R.; Wilson, Joseph B.; Henry, Gregory W. Long-Term VRI Photometry of Small-Amplitude Red Variables. I. Light Curves and Periods. The Publications of the Astronomical Society of the Pacific. 2001, 113 (786): 983–996. Bibcode:2001PASP..113..983P. doi:10.1086/322153.
Burke, Christopher J.; McCullough, P. R.; Valenti, Jeff A.; Johns‐Krull, Christopher M.; Janes, Kenneth A.; Heasley, J. N.; Summers, F. J.; Stys, J. E.; Bissinger, R.; Fleenor, Michael L.; Foote, Cindy N.; Garcia‐Melendo, Enrique; Gary, Bruce L.; Howell, P. J.; Mallia, F.; Masi, G.; Taylor, B.; Vanmunster, T. XO-2b: Transiting Hot Jupiter in a Metal-rich Common Proper Motion Binary. The Astrophysical Journal. 2007, 671 (2): 2115–2128. Bibcode:2007ApJ...671.2115B. arXiv:0705.0003. doi:10.1086/523087.
McCullough, P. R.; Burke, Christopher J.; Valenti, Jeff A.; Long, Doug; Johns‐Krull, Christopher M.; Machalek, P.; Janes, K. A.; Taylor, B.; Gregorio, J. XO-4b: An Extrasolar Planet Transiting an F5V Star. 2008. arXiv:0805.2921 [astro-ph].
Burke, Christopher J.; McCullough, P. R.; Valenti, Jeff A.; Long, Doug; Johns‐Krull, Christopher M.; Machalek, P.; Janes, Kenneth A.; Taylor, B.; Fleenor, Michael L. XO-5b: A Transiting Jupiter-sized Planet with a 4 day Period. The Astrophysical Journal. 2008, 686 (2): 1331–1340. Bibcode:2008ApJ...686.1331B. arXiv:0805.2399. doi:10.1086/591497.
Ferrarese, Laura; Bresolin, Fabio; Kennicutt Jr., Robert C.; Saha, Abhijit; Stetson, Peter B.; Freedman, Wendy L.; Mould, Jeremy R.; Madore, Barry F.; Sakai, Shoko; Ford, Holland C.; Gibson, Brad K.; Graham, John A.; Han, Mingsheng; Hoessel, John G.; Huchra, John; Hughes, Shaun M.; Illingworth, Garth D.; Phelps, Randy; Prosser, Charles F.; Silbermann, N. A. The HST Key Project on the Extragalactic Distance Scale XII. The Discovery of Cepheids and a New Distance to NGC 2541. The Astrophysical Journal. 1998, 507 (2): 655–690. Bibcode:1998ApJ...507..655F. arXiv:astro-ph/9805365. doi:10.1086/306364.
Thoene, Christina C.; Michałowski, Michał J.; Leloudas, Giorgos; Cox, Nick L.J.; Fynbo, Johan P.U.; Sollerman, Jesper; Hjorth, Jens; Vreeswijk, Paul M. NGC 2770 – a supernova Ib factory?. The Astrophysical Journal. 2009, 698 (2): 1307–1320. Bibcode:2009ApJ...698.1307T. arXiv:0807.0473. doi:10.1088/0004-637X/698/2/1307.
Foley, Ryan J.; Smith, Nathan; Ganeshalingam, Mohan; Li, Weidong; Chornock, Ryan; Filippenko, Alexei V. SN 2006jc: A Wolf-Rayet star exploding in a dense He-rich circumstellar medium.. The Astrophysical Journal Letters. 2007, 657 (2): L105. Bibcode:2007ApJ...657L.105F. arXiv:astro-ph/0612711. doi:10.1086/513145.
Irwin, Michael J.; Ibata, Rodrigo A.; Lewis, Geraint F.; Totten, Edward J. APM 08279+5255: An Ultraluminous Broad Absorption Line Quasar at a Redshift z = 3.87. The Astrophysical Journal. 1998, 505 (2): 529–535. Bibcode:1998ApJ...505..529I. arXiv:astro-ph/9806171. doi:10.1086/306213.
Riechers, Dominik A.; Walter, Fabian; Carilli, Christopher L.; Lewis, Geraint F. Imaging the Molecular Gas in a z = 3.9 Quasar Host Galaxy at 0."3 Resolution: A Central, Sub-Kiloparsec Scale Star Formation Reservoir in APM 08279+5255. The Astrophysical Journal. 2009, 690 (1): 463–485. Bibcode:2009ApJ...690..463R. arXiv:0809.0754. doi:10.1088/0004-637X/690/1/463.
Fosbury, R.A.E.; Villar-Martín, M.; Humphrey, A.; Lombardi, M.; Rosati, P.; Stern, D.; Hook, R.N.; Holden, B.P.; Stanford, S.A.; Squires, G.K.; Rauch, M.; Sargent, W.L.W. Massive Star Formation in a Gravitationally Lensed H II Galaxy at z = 3.357. The Astrophysical Journal. 2003, 596 (2): 797–809. Bibcode:2003ApJ...596..797F. arXiv:astro-ph/0307162. doi:10.1086/378228.