NGC 1535 explained

NGC 1535, also known as Cleopatra's Eye,^[1] is a planetary nebula in the constellation of Eridanus, discovered by William Herschel on February 1, 1785.^[2] It is very similar to the Eskimo Nebula in both color and structure but the central star can be quite difficult to observe visually.^[3] The object is included in the Astronomical League's Herschel 400 Observing Program.^[4]

At the center of NGC 1535, there is an O-type star with a spectral type of O(H)5.^[5]

External links

• • Web site: NGC 1535. Mt. Lemmon SkyCenter. University of Arizona. 2015-12-26. https://web.archive.org/web/20160826135843/http://skycenter.arizona.edu/gallery/nebulae/ngc1535. 2016-08-26. dead.
• Web site: Cleopatra's Eye (NGC 1535). Observing at Skyhound.

Notes and References

1. Book: Stoyan. Ronald. Schurig. Stephan. interstellarum Deep Sky Atlas. Cambridge University Press; Oculum-Verlag GmbH. Erlangen. 2014. 978-1-107-50338-0. 920437579.
2. Web site: Seligman. Courtney. Celestial Atlas: NGC Objects: NGC 1500 - 1549. cseligman.com. 11 July 2015. https://web.archive.org/web/20160101142108/http://cseligman.com/text/atlas/ngc15.htm. live. 1 January 2016.
3. Web site: Best of AOP - Planetary Nebulae: NGC 1535. Caelum Observatory (mirror of NOAO/AOP. NOAO. 11 July 2015. https://web.archive.org/web/20150713015927/http://www.noao.edu/outreach/aop/observers/n1535.html. live. 13 July 2015.
4. Web site: The Herschel 400 Club Observing List in New General Catalog (N.G.C.) Number Order. . 2024-03-05 . The Astronomical League.
5. 10.1051/0004-6361/202141916. Planetary nebulae in Gaia EDR3: Central star identification, properties, and binarity. 2021. González-Santamaría. I.. Manteiga. M.. Manchado. A.. Ulla. A.. Dafonte. C.. López Varela. P.. Astronomy & Astrophysics. 656. A51. 2109.12114. 2021A&A...656A..51G. 237940344.