PK 008+03 1, Little Gem Nebula,[1] Box Nebula[4][5]
See also: Lists of nebulae
NGC 6445, also known as the Little Gem Nebula or Box Nebula, is a planetary nebula in the constellation Sagittarius. It was discovered by William Herschel on May 28, 1786.[6] The distance of NGC 6445 is estimated to be slightly more than 1,000 parsecs based on the parallax measured by Gaia, which was measured at 0.9740±0.3151 mas.[7]
^ abcd"NGC 6445". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 December 2018.
^Stanghellini, Letizia; Shaw, Richard A.; Villaver, Eva (10 December 2008). "The Magellanic Cloud Calibration of the Galactic Planetary Nebula Distance Scale". The Astrophysical Journal. 689 (1): 194–202. arXiv:0807.1129. Bibcode:2008ApJ...689..194S. doi:10.1086/592395. S2CID 119257242.
^"Revised NGC Data for NGC 6445". spider.seds.org.
^Michael E. Bakich (June 11, 2015). "Open cluster IC 4665, the Box Nebula (NGC 6445), and globular cluster". Astronomy.com. Retrieved 27 December 2018.
^"Best of AOP: NGC 6445: The Box Nebula". www.noao.edu. National Optical Astronomy Observatory. Archived from the original on 28 December 2018. Retrieved 27 December 2018.
^Seligman, Courtney. "NGC 6445 (= P-K 008+03.1 = "PGC 3517785"), the Little Gem Nebula". Celestial Atlas. Retrieved 19 November 2018.
^Kimeswenger, S.; Barría, D. (14 August 2018). "Planetary nebula distances in Gaia DR2". Astronomy & Astrophysics. 616: L2. arXiv:1807.06368. Bibcode:2018A&A...616L...2K. doi:10.1051/0004-6361/201833647. S2CID 58893001.
NGC6445, also known as the Little Gem Nebula or Box Nebula, is a planetary nebula in the constellation Sagittarius. It was discovered by William Herschel...
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NGCNGC 6440 NGC 6520 NGC 6522 NGC 6528 NGC 6530 NGC 6540 NGC 6544 NGC 6553 NGC 6558 NGC 6569 NGC 6603 NGC 6624 NGC 6638 NGC 6642 NGC 6717 NGC 6723 Other...
NGCNGC 6440 NGC 6520 NGC 6522 NGC 6528 NGC 6530 NGC 6540 NGC 6544 NGC 6553 NGC 6558 NGC 6569 NGC 6603 NGC 6624 NGC 6638 NGC 6642 NGC 6717 NGC 6723 Other...
NGCNGC 6440 NGC 6520 NGC 6522 NGC 6528 NGC 6530 NGC 6540 NGC 6544 NGC 6553 NGC 6558 NGC 6569 NGC 6603 NGC 6624 NGC 6638 NGC 6642 NGC 6717 NGC 6723 Other...
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NGCNGC 6440 NGC 6520 NGC 6522 NGC 6528 NGC 6530 NGC 6540 NGC 6544 NGC 6553 NGC 6558 NGC 6569 NGC 6603 NGC 6624 NGC 6638 NGC 6642 NGC 6717 NGC 6723 Other...
NGCNGC 6440 NGC 6520 NGC 6522 NGC 6528 NGC 6530 NGC 6540 NGC 6544 NGC 6553 NGC 6558 NGC 6569 NGC 6603 NGC 6624 NGC 6638 NGC 6642 NGC 6717 NGC 6723 Other...
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