User:WolreChris/sandbox
test1[edit]
ngc[edit]
| NGC 486 | |
|---|---|
 SDSS view of NGC 486 | |
| Observation data (J2000[1] epoch) | |
| Constellation | Pisces[2] |
| Right ascension | 01h 21m 43.0s[3] |
| Declination | +05° 20′ 47″[3] |
| Redshift | +0.047533 ± 0.000120[1] |
| Heliocentric radial velocity | (13912 ± 36) km/s[1] |
| Distance | 636 Mly[4] |
| Apparent magnitude (V) | 15.0[2] |
| Characteristics | |
| Type | E[2] |
| Apparent size (V) | 0.5' × 0.2'[2] |
| Notable features | Angular proximity with faint star; commonly misidentified as PGC 4975 |
| Other designations | |
| PGC 1281966, GC 275, 2MASS J01221055+0524412 | |
NGC 486, also occasionally referred to as PGC 1281966 or GC 275, is a spiral galaxy in the constellation Pisces.[2] It located approximately 636 million light-years from Earth[4] and was discovered on December 6, 1850 by Irish engineer Bindon Blood Stoney.[5]
NGC 486 is commonly misidentified as PGC 4975, which is sometimes referred to as NGC 492A.[6]
Observation history[edit]
Although John Dreyer, creator of the New General Catalogue, credits the discovery to astronomer William Parsons, 3rd Earl of Rosse, he notes that many of his claimed discoveries were made by one of his assistants. In the case of NGC 486, the discovery was made by Bindon Stoney[5], who discovered it along with NGC 490, NGC 492 and NGC 500 during his observation of NGC 488[7] using Lord Rosse's 72" reflecting telescope at Birr Castle in County Offaly, Ireland.[8]
Description[edit]
The object was initially described by Stoney as "extremely faint, extremely small, stellar, 5 arcmin north of h 103". The position noted not only corresponds with the coordinates of the spiral galaxy (PGC 1281966), but also a faint star.[7] As the object was characterized as stellar, it is assumed that the initial observation was of the star, not PGC 1281966 that is generally referred to as NGC 486 today.[5]
See also[edit]
External links[edit]
- WolreChris/sandbox on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS
References[edit]
- ^ a b c "NGC 486". Retrieved 2017-11-03.
- ^ a b c d e "Revised NGC Data for NGC 486". spider.seds.org. Retrieved 2017-10-05.
- ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
- ^ a b An object's distance from Earth can be determinded 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
- ^ a b c "New General Catalog Objects: NGC 450 - 499". cseligman.com. Retrieved 2017-10-16.
- ^ "New General Catalog Objects: NGC 450 - 499". cseligman.com. Retrieved 2017-10-16.
- ^ a b "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm". Astronomy Mall.
- ^ "Photos". www.klima-luft.de. Retrieved 2017-10-29.