PGC 5037
Observation history
The object was discovered by Herschel along with NGC 496 and NGC 499. He initially described the discovery as "Three [NGC 495 along with NGC 496 and 499], eS and F, forming a triangle.". As he observed the trio again the next night, he was able to make out more detail: "Three, forming a [right triangle]; the [right angle] to the south NGC 499, the short leg preceding [NGC 495], the long towards the north [NGC 496]. Those in the legs [NGC 495 and 496] the faintest imaginable; that at the rectangle [NGC 499] a deal larger and brighter, but still very faint."
NGC 495 was later also observed by Heinrich d'Arrest and Herman Schultz who first noted the object's accurate position. This position is also noted in the New General Catalogue.
One supernova has been observed in NGC 495: SN 1999ej (type Ia, mag. 18.1).
Description
John Dreyer, creator of the New General Catalogue, uses Herschel's initial notation to describe the position of NGC 495 ("very faint, small, 1st of 3").
Modern observations however call NGC 495 a bright central galaxy with an apparent size of about 1.2' by 0.8'. It also includes fainter outer extensions, about 2.6' by 1.5'. The galaxy is also classified as a barred spiral galaxy of Hubble type SB0-a.
See also
References
- ^ "NGC 495". Retrieved 2017-11-07.
- ^ "Revised NGC Data for NGC 495". spider.seds.org. Retrieved 2017-10-05.
- ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-11-07.
- ^ An object's distance from Earth can be determined using Hubble's law: v=Ho is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=Ho
- ^ "New General Catalog Objects: NGC 450 - 499". cseligman.com. Retrieved 2017-11-07.
- ^ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". Astronomy Mall. Retrieved 2017-11-07.
- ^ Transient Name Server entry for SN 1999ej. Retrieved 31 March 2023.
External links
- NGC 495 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS