117P/Helin-Roman-Alu

Orbital Elements

The following orbital elements are taken from MPC 45658:

117P/Helin-Roman-Alu
Epoch 2005 Dec. 16.0 TT = JDT 2453720.5
T 2005 Dec. 19.9071 TT                                  MPC
q   3.036972             (2000.0)            P               Q
n   0.1196072      Peri.  222.6710      +0.1945786      +0.9722749
a   4.079727       Node    58.9404      -0.8541888      +0.2329553
e   0.255594       Incl.    8.7081      -0.4821832      -0.0203323
P   8.24
From 191 observations 1988-1999, mean residual 0".7.

Elements are also available for the current standard epoch:

117P/Helin-Roman-Alu
Epoch 2007 Apr. 10.0 TT = JDT 2454200.5
T 2005 Dec. 20.3337 TT                                  MPC
q   3.037577             (2000.0)            P               Q
n   0.1195262      Peri.  222.7603      +0.1960784      +0.9719739
a   4.081570       Node    58.9395      -0.8538282      +0.2342714
e   0.255782       Incl.    8.7080      -0.4822143      -0.0195856
P   8.25

An 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 m2

WARNING!

This 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.

2007 05 30 01 38.67 +04 36.9 4.515 3.849 43.8 10.5 17.5 20.9 2007 06 04 01 43.47 +05 04.5 4.475 3.860 47.3 11.1 17.5 20.9 2007 06 09 01 48.13 +05 30.8 4.432 3.871 50.8 11.7 17.5 20.9 2007 06 14 01 52.63 +05 55.6 4.385 3.883 54.4 12.3 17.5 20.9 2007 06 19 01 56.95 +06 19.0 4.336 3.894 58.0 12.8 17.5 20.9 2007 06 24 02 01.09 +06 40.8 4.284 3.905 61.7 13.2 17.5 20.9 2007 06 29 02 05.03 +07 01.1 4.229 3.916 65.4 13.6 17.5 20.9 2007 07 04 02 08.75 +07 19.9 4.173 3.927 69.1 14.0 17.5 20.9 2007 07 09 02 12.24 +07 37.0 4.115 3.939 73.0 14.3 17.5 20.9 2007 07 14 02 15.48 +07 52.4 4.055 3.950 76.9 14.5 17.5 20.8 2007 07 19 02 18.45 +08 06.2 3.993 3.961 80.9 14.7 17.5 20.8 2007 07 24 02 21.13 +08 18.2 3.931 3.972 84.9 14.8 17.5 20.8 2007 07 29 02 23.50 +08 28.4 3.868 3.983 89.1 14.8 17.4 20.8 2007 08 03 02 25.55 +08 36.9 3.805 3.994 93.3 14.7 17.4 20.7 2007 08 08 02 27.26 +08 43.6 3.743 4.005 97.6 14.5 17.4 20.7 2007 08 13 02 28.60 +08 48.5 3.681 4.016 102.0 14.3 17.4 20.7 2007 08 18 02 29.56 +08 51.5 3.620 4.027 106.6 13.9 17.4 20.6 2007 08 23 02 30.13 +08 52.8 3.561 4.038 111.2 13.5 17.4 20.6 2007 08 28 02 30.30 +08 52.2 3.504 4.049 116.0 13.0 17.4 20.5 2007 09 02 02 30.07 +08 50.0 3.449 4.060 120.9 12.3 17.4 20.5 2007 09 07 02 29.42 +08 46.0 3.398 4.071 125.8 11.6 17.4 20.4 2007 09 12 02 28.36 +08 40.4 3.351 4.082 130.9 10.7 17.3 20.4 2007 09 17 02 26.90 +08 33.3 3.309 4.093 136.1 9.8 17.3 20.3 2007 09 22 02 25.06 +08 24.9 3.271 4.104 141.4 8.8 17.3 20.2 2007 09 27 02 22.88 +08 15.3 3.239 4.115 146.8 7.7 17.3 20.2 2007 10 02 02 20.37 +08 04.7 3.213 4.126 152.3 6.5 17.3 20.1 2007 10 07 02 17.59 +07 53.3 3.194 4.136 157.8 5.2 17.4 20.0 2007 10 12 02 14.58 +07 41.5 3.181 4.147 163.3 4.0 17.4 20.0 2007 10 17 02 11.40 +07 29.4 3.176 4.158 168.6 2.7 17.4 19.9 2007 10 22 02 08.12 +07 17.6 3.178 4.168 173.2 1.6 17.4 19.8 2007 10 27 02 04.80 +07 06.2 3.188 4.179 174.6 1.3 17.4 19.8 2007 11 01 02 01.51 +06 55.5 3.206 4.190 171.0 2.1 17.5 19.9 2007 11 06 01 58.31 +06 45.9 3.232 4.200 165.9 3.3 17.5 20.0 2007 11 11 01 55.27 +06 37.6 3.264 4.211 160.5 4.5 17.6 20.1 2007 11 16 01 52.44 +06 30.9 3.305 4.221 154.9 5.7 17.6 20.2 2007 11 21 01 49.87 +06 26.0 3.352 4.231 149.3 6.8 17.7 20.3 2007 11 26 01 47.61 +06 23.0 3.405 4.242 143.8 7.9 17.7 20.4 2007 12 01 01 45.69 +06 22.1 3.465 4.252 138.3 8.9 17.8 20.4 2007 12 06 01 44.12 +06 23.3 3.529 4.262 133.0 9.7 17.8 20.5 2007 12 11 01 42.93 +06 26.6 3.599 4.273 127.7 10.5 17.9 20.6 2007 12 16 01 42.13 +06 32.1 3.674 4.283 122.4 11.2 18.0 20.7 2007 12 21 01 41.73 +06 39.7 3.752 4.293 117.3 11.7 18.0 20.8 2007 12 26 01 41.71 +06 49.3 3.833 4.303 112.3 12.2 18.1 20.8 2007 12 31 01 42.07 +07 00.9 3.916 4.313 107.4 12.6 18.2 20.9 2008 01 05 01 42.80 +07 14.2 4.002 4.323 102.5 12.8 18.2 20.9 2008 01 10 01 43.89 +07 29.4 4.089 4.333 97.8 13.0 18.3 21.0 2008 01 15 01 45.32 +07 46.1 4.177 4.343 93.1 13.1 18.4 21.1 2008 01 20 01 47.08 +08 04.3 4.265 4.353 88.6 13.1 18.4 21.1 2008 01 25 01 49.14 +08 23.8 4.353 4.363 84.1 13.0 18.5 21.2 2008 01 30 01 51.50 +08 44.6 4.441 4.373 79.7 12.8 18.6 21.2 2008 02 04 01 54.12 +09 06.4 4.527 4.383 75.3 12.6 18.6 21.2 2008 02 09 01 56.99 +09 29.2 4.612 4.392 71.1 12.3 18.7 21.3 2008 02 14 02 00.10 +09 52.8 4.695 4.402 66.9 11.9 18.7 21.3 2008 02 19 02 03.43 +10 17.2 4.776 4.411 62.7 11.5 18.8 21.3 2008 02 24 02 06.96 +10 42.1 4.854 4.421 58.6 11.0 18.8 21.3 2008 02 29 02 10.68 +11 07.5 4.930 4.430 54.6 10.5 18.9 21.4 2008 03 05 02 14.57 +11 33.2 5.002 4.440 50.7 9.9 18.9 21.4 2008 03 10 02 18.61 +11 59.3 5.071 4.449 46.7 9.4 19.0 21.4 2008 03 15 02 22.80 +12 25.5 5.136 4.459 42.8 8.7 19.0 21.4 2008 03 20 02 27.11 +12 51.9 5.198 4.468 39.0 8.1 19.1 21.4 2008 03 25 02 31.54 +13 18.2 5.255 4.477 35.2 7.4 19.1 21.4 2008 03 30 02 36.08 +13 44.4 5.308 4.486 31.5 6.7 19.2 21.4 2008 04 04 02 40.71 +14 10.5 5.357 4.495 27.7 5.9 19.2 21.4 2008 04 09 02 45.42 +14 36.4 5.401 4.504 24.0 5.2 19.2 21.4 2008 04 14 02 50.20 +15 02.0 5.440 4.514 20.4 4.4 19.3 21.3 2008 04 19 02 55.05 +15 27.3 5.475 4.522 16.7 3.7 19.3 21.3 2008 04 24 02 59.94 +15 52.1 5.505 4.531 13.1 2.9 19.3 21.3 2008 04 29 03 04.87 +16 16.5 5.530 4.540 9.5 2.1 19.4 21.2 2008 05 04 03 09.83 +16 40.4 5.551 4.549 5.9 1.3 19.4 21.2 2008 05 09 03 14.82 +17 03.7 5.566 4.558 2.4 0.5 19.4 21.1 2008 05 14 03 19.81 +17 26.4 5.577 4.566 1.6 0.4 19.4 21.1 2008 05 19 03 24.81 +17 48.5 5.582 4.575 5.0 1.1 19.4 21.2 2008 05 24 03 29.79 +18 10.0 5.583 4.584 8.5 1.9 19.5 21.3 2008 05 29 03 34.75 +18 30.8 5.578 4.592 12.1 2.6 19.5 21.3 2008 06 03 03 39.69 +18 50.8 5.569 4.600 15.6 3.4 19.5 21.4 2008 06 08 03 44.59 +19 10.2 5.555 4.609 19.2 4.2 19.5 21.4 2008 06 13 03 49.43 +19 28.8 5.536 4.617 22.8 4.9 19.5 21.5 2008 06 18 03 54.21 +19 46.7 5.513 4.625 26.4 5.6 19.5 21.5 2008 06 23 03 58.91 +20 03.8 5.485 4.634 30.1 6.3 19.5 21.5 2008 06 28 04 03.54 +20 20.2 5.453 4.642 33.7 7.0 19.5 21.5 2008 07 03 04 08.06 +20 35.9 5.416 4.650 37.4 7.6 19.5 21.6

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