P/2009 U4 (McNaught)
Orbital Elements
The following orbital elements are taken from MPC 67973:P/2009 U4 (McNaught) Epoch 2009 Sept. 6.0 TT = JDT 2455080.5 T 2009 Sept. 9.0989 TT MPC q 1.649016 (2000.0) P Q n 0.0861496 Peri. 259.9046 +0.7019866 +0.6973215 a 5.077313 Node 55.7035 -0.5653352 +0.6692272 e 0.675219 Incl. 10.0923 -0.4331407 +0.2566664 P 11.4 From 77 observations 2009 Oct. 11-Dec. 9, mean residual 0".6.Elements are also available for the current standard epoch:
P/2009 U4 (McNaught) Epoch 2010 Jan. 4.0 TT = JDT 2455200.5 T 2009 Sept. 9.0742 TT MPC q 1.648932 (2000.0) P Q n 0.0861869 Peri. 259.8979 +0.7018074 +0.6975032 a 5.075846 Node 55.6955 -0.5654990 +0.6690726 e 0.675141 Incl. 10.0928 -0.4332173 +0.2565756 P 11.4An explanation of the orbital elements is available.
These orbital elements are also available in forms suitable for loading into a number of popular planetarium-type software programs.
Ephemeris
The following ephemeris is at intervals of five days. A daily ephemeris covering the same time interval is also available.Personalized ephemerides for this (and other) objects may be generated using the Minor Planet & Comet Ephemeris Service.
Recent magnitude estimates for this comet (as reported to the ICQ) may be available.
Date TT R. A. (2000) Decl. Delta r Elong. Phase m1 m2WARNING! 2010 01 24 00 11.19 -03 52.0 2.559 2.192 57.4 22.2 19.4 2010 01 29 00 20.46 -02 33.1 2.638 2.224 55.0 21.3 19.6 2010 02 03 00 29.63 -01 16.2 2.717 2.257 52.5 20.3 19.7 2010 02 08 00 38.69 -00 01.0 2.796 2.290 50.0 19.3 19.8 2010 02 13 00 47.67 +01 12.2 2.874 2.324 47.5 18.3 20.0 2010 02 18 00 56.56 +02 23.5 2.951 2.357 45.0 17.2 20.1 2010 02 23 01 05.37 +03 32.8 3.027 2.391 42.4 16.2 20.2 2010 02 28 01 14.11 +04 40.2 3.102 2.425 39.8 15.2 20.3 2010 03 05 01 22.76 +05 45.6 3.175 2.460 37.2 14.1 20.4 2010 03 10 01 31.35 +06 49.0 3.247 2.494 34.6 13.1 20.5 2010 03 15 01 39.88 +07 50.3 3.317 2.529 31.9 12.0 20.6 2010 03 20 01 48.33 +08 49.7 3.385 2.563 29.2 10.9 20.7 2010 03 25 01 56.73 +09 47.1 3.451 2.598 26.6 9.9 20.8 2010 03 30 02 05.06 +10 42.5 3.515 2.633 23.9 8.8 20.9 2010 04 04 02 13.32 +11 35.8 3.576 2.668 21.1 7.8 21.0 2010 04 09 02 21.52 +12 27.2 3.634 2.703 18.4 6.7 21.1 2010 04 14 02 29.66 +13 16.6 3.690 2.737 15.6 5.7 21.2 2010 04 19 02 37.73 +14 04.0 3.743 2.772 12.8 4.6 21.3 2010 04 24 02 45.73 +14 49.5 3.792 2.807 10.0 3.6 21.4 2010 04 29 02 53.65 +15 33.0 3.838 2.842 7.2 2.5 21.5 2010 05 04 03 01.50 +16 14.6 3.881 2.877 4.4 1.5 21.5 2010 05 09 03 09.27 +16 54.3 3.921 2.912 1.6 0.6 21.6 2010 05 14 03 16.96 +17 32.1 3.957 2.947 1.6 0.5 21.7 2010 05 19 03 24.56 +18 08.1 3.989 2.982 4.4 1.5 21.7 2010 05 24 03 32.07 +18 42.3 4.018 3.016 7.3 2.5 21.8 2010 05 29 03 39.47 +19 14.7 4.043 3.051 10.3 3.4 21.9 2010 06 03 03 46.76 +19 45.4 4.064 3.085 13.3 4.3 21.9 2010 06 08 03 53.94 +20 14.4 4.081 3.120 16.3 5.3 22.0 2010 06 13 04 00.99 +20 41.8 4.094 3.154 19.4 6.1 22.0 2010 06 18 04 07.91 +21 07.6 4.103 3.189 22.5 7.0 22.1 2010 06 23 04 14.69 +21 31.9 4.108 3.223 25.7 7.9 22.2 2010 06 28 04 21.31 +21 54.7 4.110 3.257 28.9 8.7 22.2 2010 07 03 04 27.77 +22 16.1 4.107 3.291 32.1 9.4 22.2 2010 07 08 04 34.06 +22 36.2 4.101 3.325 35.4 10.2 22.3 2010 07 13 04 40.16 +22 55.1 4.091 3.358 38.7 10.9 22.3 2010 07 18 04 46.06 +23 12.7 4.077 3.392 42.1 11.6 22.4 2010 07 23 04 51.74 +23 29.3 4.060 3.426 45.5 12.2 22.4 2010 07 28 04 57.19 +23 44.9 4.038 3.459 49.0 12.8 22.4 2010 08 02 05 02.40 +23 59.5 4.014 3.492 52.6 13.4 22.4 2010 08 07 05 07.35 +24 13.3 3.986 3.525 56.3 13.8 22.5 2010 08 12 05 12.02 +24 26.4 3.956 3.558 60.0 14.3 22.5 2010 08 17 05 16.39 +24 38.8 3.922 3.591 63.8 14.6 22.5 2010 08 22 05 20.44 +24 50.6 3.886 3.624 67.7 15.0 22.5 2010 08 27 05 24.15 +25 01.9 3.847 3.657 71.6 15.2 22.6 2010 09 01 05 27.51 +25 12.9 3.807 3.689 75.7 15.4 22.6 2010 09 06 05 30.48 +25 23.5 3.765 3.722 79.8 15.5 22.6 2010 09 11 05 33.06 +25 33.9 3.721 3.754 84.1 15.5 22.6 2010 09 16 05 35.21 +25 44.1 3.677 3.786 88.5 15.4 22.6 2010 09 21 05 36.91 +25 54.2 3.632 3.818 93.0 15.2 22.6 2010 09 26 05 38.16 +26 04.2 3.587 3.850 97.6 15.0 22.6 2010 10 01 05 38.93 +26 14.1 3.543 3.881 102.3 14.6 22.6 2010 10 06 05 39.19 +26 23.9 3.500 3.913 107.1 14.1 22.6 2010 10 11 05 38.95 +26 33.6 3.458 3.944 112.1 13.6 22.7 2010 10 16 05 38.20 +26 43.1 3.419 3.975 117.2 12.9 22.7 2010 10 21 05 36.94 +26 52.4 3.383 4.006 122.4 12.1 22.7 2010 10 26 05 35.17 +27 01.2 3.351 4.037 127.8 11.2 22.7 2010 10 31 05 32.92 +27 09.6 3.323 4.068 133.2 10.2 22.7 2010 11 05 05 30.21 +27 17.3 3.300 4.099 138.8 9.2 22.7 2010 11 10 05 27.07 +27 24.2 3.283 4.129 144.4 8.0 22.7 2010 11 15 05 23.57 +27 30.1 3.272 4.160 150.2 6.8 22.8 2010 11 20 05 19.76 +27 34.9 3.268 4.190 155.9 5.5 22.8 2010 11 25 05 15.71 +27 38.5 3.271 4.220 161.7 4.2 22.8 2010 11 30 05 11.50 +27 40.9 3.282 4.250 167.4 2.9 22.9 2010 12 05 05 07.20 +27 42.1 3.300 4.280 172.5 1.7 22.9 2010 12 10 05 02.91 +27 42.0 3.327 4.309 175.1 1.1 23.0 2010 12 15 04 58.71 +27 40.7 3.362 4.339 172.0 1.8 23.0 2010 12 20 04 54.67 +27 38.5 3.405 4.368 166.7 3.0 23.1 2010 12 25 04 50.88 +27 35.5 3.455 4.397 161.1 4.2 23.1 2010 12 30 04 47.38 +27 31.9 3.513 4.426 155.4 5.3 23.2 2011 01 04 04 44.22 +27 27.9 3.579 4.455 149.7 6.4 23.3 2011 01 09 04 41.47 +27 23.7 3.651 4.484 144.0 7.4 23.3 2011 01 14 04 39.13 +27 19.6 3.729 4.513 138.5 8.3 23.4 2011 01 19 04 37.24 +27 15.7 3.813 4.541 133.0 9.1 23.5 2011 01 24 04 35.80 +27 12.2 3.902 4.570 127.6 9.8 23.6 2011 01 29 04 34.80 +27 09.2 3.995 4.598 122.4 10.4 23.6 2011 02 03 04 34.26 +27 06.8 4.092 4.626 117.2 10.9 23.7 2011 02 08 04 34.15 +27 05.0 4.192 4.654 112.1 11.3 23.8 2011 02 13 04 34.46 +27 03.9 4.295 4.682 107.1 11.6 23.9 2011 02 18 04 35.17 +27 03.6 4.399 4.709 102.3 11.8 23.9 2011 02 23 04 36.27 +27 04.0 4.505 4.737 97.5 12.0 24.0 2011 02 28 04 37.72 +27 05.0 4.612 4.764 92.8 12.0 24.1This comet gets close to the sun during the period covered in the ephemeris below. Observers are warned to be wary of observing comets near the sun. NEVER point any kind of optical instrument at the sun--instant blindness will be the probable result.
