| Field | Units | Value |
|---|---|---|
| 3CRR name | 3C277.2 | |
| IAU name | 1251+159 | |
| Redshift | 0.766 (r) | |
| 178-MHz flux | (Jy) | 13.1 |
| Sp. index | 1.02 | |
| FR class | II (r) | |
| 5-GHz core flux | (mJy) | 0.48 (r) |
| Old radio position | (reference) | (r) |
| `Best' radio map | (reference) | (r) |
| RA | (B1950) | 12 51 04.200 |
| DEC | (B1950) | +15 58 51.20 |
| Optical position | (reference) | (r) |
| Type | 1 | |
| LAS | (arcsec) | 55 |
| Size | (kpc) | 410 |
| Scale | (kpc/arcsec) | 7.39 |
| Luminosity distance | (Mpc) | 4760 |
| 178-MHz luminosity | (W/Hz/sr) | 285 x 1025 |
| B magnitude | (mag) | -- |
| V magnitude | (mag) | -- |
| R magnitude | (mag) | 21.5 (r) (n) |
| r magnitude | (mag) | -- |
| Radio RA | (J2000) | 12 53 33.320 |
| Radio DEC | (J2000) | +15 42 30.96 |
| New IAU name | J1253+157 |