Orbital elements: P/2009 W1 = 1999 XO188 (identification by F. Manca)Epoch 2000 Apr. 6.0 TT = JDT 2451640.5T 2000 Apr. 18.05278 TT MPCq 2.9614945 (2000.0) P Qn 0.10460275 Peri. 53.35918 -0.31268816 -0.92629830a 4.4610866 Node 56.17600 +0.77055880 -0.37678892e 0.3361495 Incl. 14.65882 +0.55539648 +0.00125228P 9.42
Orbital elements: P/2009 W1 (Hill)T 2009 Oct. 2.061 TT MPCq 2.98322 (2000.0) P Qn 0.104056 Peri. 53.563 -0.315279 -0.925530a 4.47671 Node 56.128 +0.769645 -0.378675e 0.33361 Incl. 14.633 +0.555199 -0.000640P 9.47From 105 observations 2009 Nov. 18-Dec. 15.
Orbital elements: P/2009 W1 (Hill)T 2009 Sept. 30.890 TT MPCq 2.98388 (2000.0) P Qn 0.103245 Peri. 53.255 -0.311140 -0.926879a 4.50012 Node 56.181 +0.771359 -0.375355e 0.33693 Incl. 14.639 +0.555155 +0.002061P 9.55From 95 observations 2009 Nov. 18-Dec. 6.
Orbital elements: P/2009 W1 (Hill)T 2009 Sept. 26.669 TT MPCq 2.97739 (2000.0) P Qn 0.103266 Peri. 52.372 -0.294982 -0.932255a 4.49949 Node 56.066 +0.777699 -0.361626e 0.33828 Incl. 14.625 +0.555131 +0.011237P 9.54From 83 observations 2009 Nov. 18-29.
Orbital elements: P/2009 W1 (Hill)T 2009 Sept. 10.190 TT MPCq 2.93817 (2000.0) P Qn 0.107992 Peri. 49.150 -0.228383 -0.951533a 4.36726 Node 55.223 +0.800664 -0.303933e 0.32723 Incl. 14.523 +0.553875 +0.047003P 9.13From 57 observations 2009 Nov. 18-23.
C/2009 W1 (Hill)T 2009 June 26.522 TT MPCq 2.46311 (2000.0) P Q Peri. 18.740 +0.299865 -0.932319 Node 54.303 +0.840372 +0.157870e 1.0 Incl. 14.413 +0.451505 +0.325358From 31 observations 2009 Nov. 18-19.