* Astronomy

Comet 230P/LINEAR is at Opposition (4.131 AU) on the 6th June, 2013.

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   Mag
2013 06 05    17 04 25.5 -11 44 28   4.1328  5.1320   168.8     2.2  23.2
2013 06 06    17 03 44.8 -11 44 13   4.1308  5.1305   169.0     2.2  23.2
2013 06 07    17 03 04.1 -11 44 01   4.1291  5.1290   169.0     2.2  23.2
2013 06 08    17 02 23.3 -11 43 52   4.1277  5.1274   168.9     2.2  23.2
2013 06 09    17 01 42.5 -11 43 45   4.1266  5.1259   168.7     2.2  23.2
2013 06 10    17 01 01.6 -11 43 40   4.1258  5.1244   168.4     2.3  23.2
2013 06 11    17 00 20.9 -11 43 37   4.1253  5.1229   168.0     2.4  23.2
2013 06 12    16 59 40.1 -11 43 37   4.1252  5.1213   167.5     2.5  23.2
2013 06 13    16 58 59.5 -11 43 40   4.1253  5.1198   167.0     2.6  23.2
2013 06 14    16 58 19.0 -11 43 45   4.1257  5.1183   166.3     2.7  23.2
2013 06 15    16 57 38.6 -11 43 53   4.1265  5.1167   165.7     2.8  23.2
2013 06 16    16 56 58.4 -11 44 03   4.1275  5.1152   164.9     3.0  23.2
2013 06 17    16 56 18.3 -11 44 15   4.1288  5.1136   164.1     3.1  23.2
2013 06 18    16 55 38.5 -11 44 30   4.1305  5.1120   163.3     3.3  23.2
2013 06 19    16 54 58.9 -11 44 48   4.1324  5.1104   162.5     3.4  23.2
2013 06 20    16 54 19.5 -11 45 09   4.1346  5.1089   161.6     3.6  23.2
2013 06 21    16 53 40.4 -11 45 31   4.1371  5.1073   160.7     3.8  23.2
2013 06 22    16 53 01.6 -11 45 57   4.1399  5.1057   159.8     3.9  23.2
2013 06 23    16 52 23.2 -11 46 25   4.1430  5.1041   158.9     4.1  23.2
2013 06 24    16 51 45.1 -11 46 56   4.1464  5.1025   157.9     4.3  23.2
2013 06 25    16 51 07.3 -11 47 29   4.1500  5.1009   156.9     4.5  23.2
2013 06 26    16 50 29.9 -11 48 05   4.1540  5.0992   156.0     4.7  23.2
2013 06 27    16 49 52.9 -11 48 44   4.1582  5.0976   155.0     4.8  23.2
2013 06 28    16 49 16.3 -11 49 25   4.1627  5.0960   154.0     5.0  23.2
2013 06 29    16 48 40.2 -11 50 09   4.1675  5.0943   153.0     5.2  23.2
2013 06 30    16 48 04.5 -11 50 56   4.1725  5.0927   152.0     5.4  23.2

COMET 230P/2009 U6 = 1997 A2 = 2002 Q15 (LINEAR)
As first reported on CBET 2072, S. Nakano, Sumoto, Japan, has identified observations of comet P/2009 U6 (cf. IAUCs 9090, 9092) among single-night data from NEAT at the two preceding apparitions (on 1997 Jan. 11; and 2002 Aug. 20 and Sept. 9). R. Matson, Irvine, CA, independently located the images corresponding to the same observations (now given the designations P/1997 A2 and P/2002 Q15) and provided measurements from them, together with measurements from NEAT images on 1997 Jan. 10 and on five further nights during 2002 July 24-Sept. 16. The comet's approach to a distance of 0.88 AU from Jupiter in Sept. 2007 means that the orbital period, currently 6.27 years, was previously 6.48-6.49 years, with the comet's previous two perihelion passages occurring on 2003 Mar. 3 and 1996 Sept. 4. The available 1997 and 2002 astrometry (together with more from 2009), orbital elements linking the three apparitions, residuals, and an ephemeris appear on MPEC 2009-X47. The permanent number designation 230P has been assigned to this comet.
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