100P/Hartley
Orbital Elements
The following orbital elements are taken from MPC 56805:
100P/Hartley
Epoch 2009 Nov. 25.0 TT = JDT 2455160.5
T 2009 Dec. 6.1473 TT MPC
q 1.982408 (2000.0) P Q
n 0.1565268 Peri. 181.7079 -0.7728420 +0.5763349
a 3.409914 Node 37.8448 -0.5769798 -0.4638898
e 0.418634 Incl. 25.6542 -0.2642150 -0.6727884
P 6.30
From 172 observations 1985-2003, mean residual 0".8. Nongravitational
parameters A1 = +0.24, A2 = -0.0018.
Elements are also available for the current standard epoch:
100P/Hartley Epoch 2009 June 18.0 TT = JDT 2455000.5 T 2009 Dec. 6.1406 TT MPC q 1.982377 (2000.0) P Q n 0.1564821 Peri. 181.7049 -0.7728411 +0.5763350 a 3.410564 Node 37.8476 -0.5769904 -0.4639114 e 0.418754 Incl. 25.6527 -0.2641943 -0.6727735 P 6.30An 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! 2009 06 08 09 30.03 +35 41.8 2.783 2.409 58.3 21.0 18.9 24.7 2009 06 13 09 38.27 +34 26.6 2.809 2.389 55.7 20.6 18.8 24.7 2009 06 18 09 46.63 +33 09.9 2.835 2.370 53.2 20.1 18.8 24.6 2009 06 23 09 55.11 +31 51.8 2.859 2.351 50.7 19.6 18.7 24.6 2009 06 28 10 03.69 +30 32.2 2.881 2.332 48.3 19.0 18.7 24.6 2009 07 03 10 12.35 +29 11.2 2.902 2.313 45.9 18.4 18.6 24.6 2009 07 08 10 21.08 +27 48.8 2.922 2.295 43.6 17.8 18.5 24.6 2009 07 13 10 29.87 +26 25.0 2.940 2.277 41.3 17.1 18.5 24.5 2009 07 18 10 38.71 +24 59.9 2.957 2.259 39.0 16.4 18.4 24.5 2009 07 23 10 47.61 +23 33.4 2.972 2.242 36.8 15.7 18.4 24.5 2009 07 28 10 56.55 +22 05.7 2.986 2.225 34.6 15.0 18.3 24.4 2009 08 02 11 05.53 +20 36.8 2.998 2.209 32.4 14.2 18.3 24.4 2009 08 07 11 14.54 +19 06.8 3.009 2.193 30.2 13.5 18.2 24.4 2009 08 12 11 23.60 +17 35.7 3.018 2.177 28.1 12.7 18.2 24.3 2009 08 17 11 32.69 +16 03.6 3.026 2.162 26.0 11.8 18.1 24.3 2009 08 22 11 41.82 +14 30.7 3.033 2.147 23.9 11.0 18.0 24.3 2009 08 27 11 50.99 +12 57.0 3.038 2.133 21.8 10.1 18.0 24.2 2009 09 01 12 00.21 +11 22.5 3.041 2.119 19.8 9.3 17.9 24.2 2009 09 06 12 09.47 +09 47.5 3.044 2.106 17.8 8.4 17.9 24.1 2009 09 11 12 18.78 +08 12.1 3.044 2.094 15.8 7.5 17.8 24.1 2009 09 16 12 28.15 +06 36.2 3.044 2.082 13.8 6.6 17.8 24.0 2009 09 21 12 37.58 +05 00.0 3.042 2.070 12.0 5.8 17.7 24.0 2009 09 26 12 47.07 +03 23.7 3.039 2.059 10.2 4.9 17.7 23.9 2009 10 01 12 56.64 +01 47.4 3.034 2.049 8.5 4.2 17.6 23.8 2009 10 06 13 06.27 +00 11.2 3.028 2.040 7.1 3.5 17.6 23.8 2009 10 11 13 16.00 -01 24.8 3.021 2.031 6.1 3.0 17.6 23.7 2009 10 16 13 25.81 -03 00.4 3.012 2.023 5.8 2.9 17.5 23.7 2009 10 21 13 35.72 -04 35.5 3.002 2.015 6.3 3.1 17.5 23.7 2009 10 26 13 45.72 -06 10.0 2.991 2.009 7.3 3.6 17.4 23.7 2009 10 31 13 55.83 -07 43.7 2.978 2.003 8.8 4.3 17.4 23.8 2009 11 05 14 06.05 -09 16.5 2.964 1.998 10.5 5.2 17.4 23.8 2009 11 10 14 16.39 -10 48.2 2.949 1.993 12.4 6.1 17.3 23.8 2009 11 15 14 26.86 -12 18.8 2.933 1.989 14.4 7.1 17.3 23.9 2009 11 20 14 37.45 -13 48.0 2.915 1.987 16.4 8.1 17.3 23.9 2009 11 25 14 48.17 -15 15.8 2.896 1.984 18.5 9.1 17.3 23.9 2009 11 30 14 59.01 -16 41.9 2.875 1.983 20.6 10.1 17.2 23.9 2009 12 05 15 09.99 -18 06.4 2.854 1.982 22.8 11.1 17.2 24.0 2009 12 10 15 21.11 -19 28.9 2.831 1.983 25.0 12.1 17.2 24.0 2009 12 15 15 32.37 -20 49.5 2.807 1.984 27.2 13.1 17.2 24.0 2009 12 20 15 43.76 -22 08.0 2.782 1.985 29.5 14.1 17.2 24.0 2009 12 25 15 55.28 -23 24.3 2.756 1.988 31.7 15.1 17.2 24.0 2009 12 30 16 06.92 -24 38.4 2.729 1.991 34.0 16.0 17.2 24.0 2010 01 04 16 18.67 -25 50.0 2.701 1.995 36.3 17.0 17.2 24.1 2010 01 09 16 30.55 -26 59.2 2.672 2.000 38.6 17.9 17.2 24.1 2010 01 14 16 42.52 -28 06.0 2.642 2.006 41.0 18.8 17.2 24.1 2010 01 19 16 54.58 -29 10.2 2.611 2.012 43.4 19.6 17.2 24.1 2010 01 24 17 06.71 -30 12.0 2.579 2.019 45.8 20.4 17.2 24.1 2010 01 29 17 18.89 -31 11.3 2.546 2.027 48.2 21.2 17.2 24.1 2010 02 03 17 31.12 -32 08.1 2.513 2.036 50.6 22.0 17.2 24.1 2010 02 08 17 43.36 -33 02.6 2.478 2.045 53.1 22.7 17.2 24.1 2010 02 13 17 55.60 -33 54.8 2.444 2.055 55.6 23.4 17.2 24.1 2010 02 18 18 07.81 -34 44.8 2.408 2.065 58.2 24.0 17.2 24.1 2010 02 23 18 19.96 -35 33.0 2.373 2.076 60.7 24.6 17.2 24.1 2010 02 28 18 32.02 -36 19.3 2.336 2.088 63.3 25.1 17.2 24.1 2010 03 05 18 43.97 -37 04.1 2.300 2.100 65.9 25.5 17.3 24.1 2010 03 10 18 55.78 -37 47.5 2.263 2.113 68.6 25.9 17.3 24.1 2010 03 15 19 07.42 -38 29.9 2.226 2.127 71.3 26.3 17.3 24.1 2010 03 20 19 18.85 -39 11.7 2.189 2.141 74.0 26.6 17.3 24.1 2010 03 25 19 30.02 -39 53.0 2.152 2.155 76.8 26.8 17.3 24.0 2010 03 30 19 40.92 -40 34.2 2.115 2.170 79.6 26.9 17.4 24.0 2010 04 04 19 51.51 -41 15.7 2.078 2.185 82.5 27.0 17.4 24.0 2010 04 09 20 01.75 -41 57.8 2.042 2.201 85.4 27.0 17.4 24.0 2010 04 14 20 11.58 -42 40.9 2.006 2.218 88.4 26.9 17.4 24.0 2010 04 19 20 20.97 -43 25.4 1.971 2.234 91.4 26.7 17.5 23.9 2010 04 24 20 29.88 -44 11.5 1.937 2.251 94.5 26.4 17.5 23.9 2010 04 29 20 38.25 -44 59.4 1.903 2.269 97.6 26.1 17.5 23.9 2010 05 04 20 46.03 -45 49.5 1.872 2.286 100.8 25.7 17.5 23.8 2010 05 09 20 53.17 -46 41.9 1.841 2.305 104.1 25.1 17.6 23.8 2010 05 14 20 59.60 -47 36.7 1.812 2.323 107.3 24.5 17.6 23.8 2010 05 19 21 05.25 -48 33.9 1.786 2.342 110.6 23.9 17.6 23.7 2010 05 24 21 10.04 -49 33.2 1.761 2.361 113.9 23.1 17.7 23.7 2010 05 29 21 13.93 -50 34.3 1.739 2.380 117.2 22.3 17.7 23.7 2010 06 03 21 16.82 -51 36.8 1.720 2.399 120.5 21.4 17.8 23.6 2010 06 08 21 18.64 -52 40.0 1.704 2.419 123.7 20.4 17.8 23.6 2010 06 13 21 19.32 -53 43.1 1.691 2.439 126.8 19.5 17.9 23.6 2010 06 18 21 18.81 -54 45.0 1.682 2.459 129.8 18.5 17.9 23.5 2010 06 23 21 17.07 -55 44.3 1.677 2.479 132.5 17.6 18.0 23.5 2010 06 28 21 14.12 -56 39.7 1.676 2.500 134.9 16.7 18.1 23.5 2010 07 03 21 09.99 -57 29.8 1.679 2.520 137.0 16.0 18.2 23.5 2010 07 08 21 04.79 -58 13.3 1.688 2.541 138.6 15.3 18.2 23.5 2010 07 13 20 58.66 -58 48.7 1.701 2.562 139.7 14.9 18.3 23.5This 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.
