| UGC 3730 | |
|---|---|
 UGC 3730 byHubble Space Telescope | |
| Observation data (J2000epoch) | |
| Constellation | Camelopardalis |
| Right ascension | 07h 14m 20.4s[1] |
| Declination | +73° 28′ 37″[1] |
| Redshift | 0.009030 ± 0.000005[1] |
| Heliocentric radial velocity | 2,707 ± 1km/s[1] |
| Distance | 132 ± 9Mly (40.5 ± 2.8Mpc)[1] |
| Apparent magnitude (V) | 13.2 |
| Characteristics | |
| Type | S0 pec + Ring[1] |
| Apparent size (V) | 2.8′ × 1.5′[1] |
| Notable features | Collisional ring |
| Other designations | |
| Arp 141, VV 123, CGCG 330-033,MCG +12-07-035,PGC 20460 | |
UGC 3730 orArp 141 is aring galaxy in the constellationCamelopardalis. The galaxy lies about 130 millionlight years away from Earth, which means, given its apparent dimensions, that UGC 3730 is approximately 110,000 light years across.[1] The galaxy is included inHalton Arp'sAtlas of Peculiar Galaxies in the elliptical galaxies emanating material category.
UGC 3730 has been the result ofgalaxy interaction. The interaction has led one galaxy to turn into an asymmetric ring. The companion, alenticular galaxy, lies along the major axis of the ring and it is estimated to have a larger mass than the ring galaxy.[2] The nucleus of the ring galaxy lies between the ring and companion galaxy.[2] Emission has been observed in the interior of the ring as well as between the ring galaxy and the companion galaxy and stars have beentidally stripped from the ring galaxy.[2][3] Thestar formation rate of the ring galaxy is estimated to be 0.26M☉ per year. The total stellar mass of the galaxy is estimated to be8.3×109 M☉ and the total gas mass to be4.9×109 M☉.[2]
UGC 3730 forms a pair with UGC 3705 which lies 9.4 arcminutes away.[4] Both galaxies are part of the LGG 141 galaxy group, which also includes UGC 3697, UGC 3714, UGC 3804, UGC 3838, UGC 3878, UGC 3626, UGC 3644, and UGC 3701.[5]
