NGC1723 Galaxy in Eridanus
| DATE | 11 Nov 2018 |
| TELESCOPE OPTICS | 508 mm mirror f.4 . effective f4.6 with paracorr2. ccd Kodak KAF8300 3326 x 2504px 5.4 x 5.4µm |
| EXPOSURE | binning 2: composite image, 13 min |
| IMAGE SIZE (ARCMIN) | 26 |
| LIGHT TRAVEL TIME (Derived Redshift. Millions Light Years) | NGC1721 = 198 NGC1723 = 165 NGC1725 = 171 NGC1728 = 166 2MASX J04593424-1055144 = 603 |
| MAGNITUDE | NGC1721 = 13 NGC1723 = 12.5 NGC1725 = 13.7 NGC1728 = 13 2MASX J04593424-1055144 = 17.4b |
| POSITION RA-DEC J2000 | NGC1721 = 04:59:17.40 -11:07:07.0 NGC1723 = 04:59:25.90 -10:58:50.0 NGC1725 = 04:59:22.90 -11:07:56.0 NGC1728 = 04:59:27.70 -11:07:23.0 2MASX J04593424-1055144 = 04:59:34.20 -10:55:14.0 |
| POSITION ANGLE: | |
| Rotation Velocity km/s | NGC1721 = 210 (max) NGC1723 = 220 (max) NGC1725 = na NGC1728 = 243 (max) |
| Size (KiloParsecs... kpc) | NGC1721 = 36.98 (RC3 D_25; R_25 (blue)) NGC1723 = 43.35 (RC3 D_0 (blue)) NGC1725 = 6.89 (POSS1 103a-O) NGC1728 = 28.36 (RC3 D_0 (blue)) |
| DETAILS | NGC1721 is a ringed weakly barred spiral NGC1723 is a barred spiral. It has two arms and a ring at the radius of the bar. NGC1725 is a spiral galaxy and part of a triple system with NGC1721 and NGC1728. Supernova SN 2009F was discovered near it's core. NGC1728 is an edge-on spiral |
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