| NGC 5273 | |
|---|---|
Sloan Digital Sky Survey image of NGC 5273
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| Observation data (J2000 epoch) | |
| Right ascension | 13h42m 08.380s[1] |
| Declination | +35° 39′ 15.47″[1] |
| Redshift | 0.00362[2] |
| Distance | 54.1 ± 6.8 Mly (16.6 ± 2.1 Mpc)[3][4] |
| Apparent magnitude (V) | 11.6[5] 13.12[6] |
| Apparent magnitude (B) | 14.01[6] |
| Characteristics | |
| Type | SA0(s)[4] |
| Apparent size (V) | 2.8′ × 2.4′[5] |
| Other designations | |
| NGC 5273, UGC 8675, PGC 48521[7] | |
NGC 5273 is a lenticular galaxy located 54 million light-years[4] away in the northern constellationofCanes Venatici. This galaxy was discovered by William Herschel on May 1, 1785.[8] It is positioned 1+1⁄4° to the southeast of the star 25 Canum Venaticorum.[5]
The morphological classification of this galaxy is SA0(s),[4] indicating it is lenticular in form. It displays a faint, unbarred spiral structure within a generally elliptical profile.[9] NGC 5273 is classified as a type 1.5 Seyfert galaxy, with the X-ray emission from its active galactic nucleus undergoing significant absorption.[10] However, data collected between the year 2000 and 2022 suggest this is a changing–look Seyfert, with the type ranging from 1 to 1.8/1.9.[11] The activity level shows strong variability, allowing reverberation mapping of the supermassive black hole at the core. This object has an estimated mass of (4.7±1.6)×106 M☉.[9]
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