April 16, 2004 09:15:25 UT Orbit 1. Comet P/2004 EW38 ( Catalina-LINEAR ) The following improved orbital elements by Kenji Muraoka, are from 34 observations 2003 Dec. 28 to 2004 Apr. 14, perturbations by 9 Planets, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.60 arc seconds. Epoch = 2003 Nov. 17.0 TT JDT = 2452960.5 T = 2003 Nov. 19.89687 +/- 0.00082 (m.e.) TT Peri. = 90.23540 +/- 0.00372 Node = 49.90144 +/- 0.00421 (2000.0) Incl. = 6.52329 +/- 0.00050 q = 1.7933513 +/- 0.0001880 AU e = 0.5002610 +/- 0.0000383 a = 3.5885756 +/- 0.0002563 AU nK = 0.14498428 +/- 0.00001553 P = 6.798 +/- 0.0007284 years (+/- 0.27 day) Residuals in seconds of arc 031228 704 0.5+ 1.3+ 040314 703 0.3- 0.3- 040325 699 (2.7- 0.4+) 031228 704 0.2+ 0.7+ 040314 703 (0.7- 2.0-) 040325 699 0.1+ 0.6+ 031228 704 0.1- 0.1+ 040314 703 0.1- 0.1- 040325 699 0.6- 1.0- 031228 704 0.5+ 0.3+ 040314 703 0.5- 0.0 040409 E12 0.0 1.4+ 040123 704 1.3+ 0.7- 040316 704 0.6+ 1.2- 040409 E12 0.3+ 1.2+ 040123 704 0.3- 0.1- 040316 704 0.2- 0.2+ 040409 E12 0.2- 0.4+ 040123 704 0.1+ 0.7+ 040316 704 0.1+ 0.4+ 040409 E12 0.5+ 1.0+ 040123 704 1.0+ 0.9- 040322 704 0.4+ 0.6- 040414 691 0.2- 0.1- 040123 699 0.8- 0.0 040322 704 0.2+ 0.1- 040414 691 0.2- 0.0 040123 699 1.1- 0.3- 040322 704 0.5+ 1.1- 040414 696 0.2+ 0.2- 040123 699 0.0 0.1- 040322 704 0.2+ 0.2- 040414 696 0.0 0.3- 040123 699 1.5- 0.1- 040325 699 0.9- 0.4- 040414 691 0.0 0.0 Orbit 2. P/2004 EW38 (Catalina-LINEAR) Epoch 1997 Feb. 1.0 TT = JDT 2450480.5 T 1997 Jan. 30.87646 TT Muraoka q 1.8027142 (2000.0) P Q n 0.14452492 Peri. 90.27748 -0.76344990 -0.63999468 a 3.5961756 Node 49.93289 +0.53817618 -0.70475534 e 0.4987135 Incl. 6.51985 +0.35708635 -0.30614819 P 6.82 From 34 observations 2003 Dec. 28-2004 Apr. 14, mean residual 0".60. Orbit 3. ? Comet P/2004 EW38 ( Catalina-LINEAR ) The following improved orbital elements by Kenji Muraoka, are from 40 observations 1997 Jan. 15 to 2004 Apr. 14 perturbations by 9 Plantes, Moon and 5 minor planets were taken into account. The mean residual is +/- 0.61 arc seconds. Epoch = 2003 Nov. 17.0 TT JDT = 2452960.5 T = 2003 Nov. 19.89700 +/- 0.00175 (m.e.) TT Peri. = 90.23470 +/- 0.00118 Node = 49.90225 +/- 0.00034 (2000.0) Incl. = 6.52319 +/- 0.00006 q = 1.7933548 +/- 0.0000164 AU e = 0.5002775 +/- 0.0000047 a = 3.5887014 +/- 0.0000131 AU nK = 0.14497666 +/- 0.00000080 P = 6.798 +/- 0.0000373 years T = 1997 Jan. 30.74628 TT Epoch = 1997 Feb. 1.0 TT Peri. = 90.27676 e = 0.4987301 Node = 49.93370 (2000.0) a = 3.5963013 AU Incl. = 6.51976 nK = 0.144517342 q = 1.8027175 AU P = 6.820 years Residuals in seconds of arc 970115 566 0.3- 0.5+ 040123 699 0.7- 0.2+ 040322 704 0.3+ 0.2- 970115 566 0.9- 1.1- 040123 699 0.9- 0.1- 040325 699 0.8- 0.4- 970115 566 0.4+ 0.5+ 040123 699 0.1+ 0.1+ 040325 699 (2.7- 0.4+) 970115 566 0.3- 1.2- 040123 699 1.4- 0.1+ 040325 699 0.2+ 0.6+ 970115 566 0.4+ 0.4+ 040314 703 0.1- 0.3- 040325 699 0.6- 1.0- 970115 566 0.2+ 0.1- 040314 703 (0.6- 2.0-) 040409 E12 0.1- 1.3+ 031228 704 0.6+ 1.5+ 040314 703 0.0 0.1- 040409 E12 0.2+ 1.1+ 031228 704 0.3+ 0.9+ 040314 703 0.4- 0.0 040409 E12 0.4- 0.4+ 031228 704 0.0 0.3+ 040316 704 0.7+ 1.2- 040409 E12 0.4+ 0.9+ 031228 704 0.6+ 0.6+ 040316 704 0.1- 0.2+ 040414 691 0.4- 0.2- 040123 704 1.4+ 0.5- 040316 704 0.2+ 0.4+ 040414 691 0.3- 0.1- 040123 704 0.2- 0.1+ 040322 704 0.5+ 0.7- 040414 696 0.1+ 0.3- 040123 704 0.2+ 0.9+ 040322 704 0.2+ 0.1- 040414 696 0.2- 0.4- 040123 704 1.2+ 0.7- 040322 704 0.6+ 1.1- 040414 691 0.1- 0.1- --