129P/Shoemaker-Levy 3
| Parameter |
Value |
| Designation |
129P/Shoemaker-Levy 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-02-10T02:31:43.579200Z |
| Orbit solution date (soln_date, UTC) |
2025-06-27T14:17:32Z |
| Obs used |
720 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-07-07.0000000 |
| e |
0.09063771 |
| q (au) |
3.913589 |
| a (au) |
4.303663 |
| i (deg) |
3.432831 |
| Ω (om, deg) |
185.156275 |
| ω (w, deg) |
309.132971 |
| M (ma, deg) |
335.922407 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.543 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.543 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.969 |
| k |
1.000 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
18:24:54.11 |
-20:22:18.2 |
HIP 90289 |
11.99 |
| 2026-02-03 12:00 |
18:25:23.94 |
-20:21:49.1 |
HIP 90289 |
10.70 |
| 2026-02-04 00:00 |
18:25:53.69 |
-20:21:19.6 |
HIP 90289 |
13.54 |
| 2026-02-04 12:00 |
18:26:23.36 |
-20:20:49.7 |
HIP 90289 |
18.69 |
| 2026-02-05 00:00 |
18:26:52.94 |
-20:20:19.4 |
HIP 90289 |
24.73 |
| 2026-02-05 12:00 |
18:27:22.45 |
-20:19:48.7 |
HIP 90515 |
30.28 |
| 2026-02-06 00:00 |
18:27:51.87 |
-20:19:17.6 |
HIP 90515 |
29.08 |
| 2026-02-06 12:00 |
18:28:21.20 |
-20:18:46.1 |
HIP 90515 |
29.49 |
| 2026-02-07 00:00 |
18:28:50.45 |
-20:18:14.3 |
HIP 90721 |
24.11 |
| 2026-02-07 12:00 |
18:29:19.61 |
-20:17:42.0 |
HIP 90721 |
17.26 |
| 2026-02-08 00:00 |
18:29:48.68 |
-20:17:09.4 |
HIP 90721 |
10.44 |
| 2026-02-08 12:00 |
18:30:17.66 |
-20:16:36.4 |
HIP 90721 |
3.70 |
| 2026-02-09 00:00 |
18:30:46.56 |
-20:16:03.0 |
HIP 90721 |
3.36 |
| 2026-02-09 12:00 |
18:31:15.36 |
-20:15:29.3 |
HIP 90721 |
10.05 |
| 2026-02-10 00:00 |
18:31:44.08 |
-20:14:55.2 |
HIP 90721 |
16.79 |
| 2026-02-10 12:00 |
18:32:12.69 |
-20:14:20.8 |
HIP 90978 |
19.48 |
| 2026-02-11 00:00 |
18:32:41.22 |
-20:13:45.9 |
HIP 90978 |
13.95 |
| 2026-02-11 12:00 |
18:33:09.65 |
-20:13:10.8 |
HIP 90978 |
10.00 |
| 2026-02-12 00:00 |
18:33:37.99 |
-20:12:35.3 |
HIP 90978 |
9.74 |
| 2026-02-12 12:00 |
18:34:06.23 |
-20:11:59.4 |
HIP 90978 |
13.37 |
| 2026-02-13 00:00 |
18:34:34.37 |
-20:11:23.2 |
HIP 90978 |
18.72 |
| 2026-02-13 12:00 |
18:35:02.42 |
-20:10:46.7 |
HIP 91238 |
24.14 |
| 2026-02-14 00:00 |
18:35:30.36 |
-20:10:09.8 |
HIP 91238 |
18.38 |
| 2026-02-14 12:00 |
18:35:58.20 |
-20:09:32.6 |
HIP 91238 |
13.41 |
| 2026-02-15 00:00 |
18:36:25.95 |
-20:08:55.1 |
HIP 91238 |
10.41 |
| 2026-02-15 12:00 |
18:36:53.59 |
-20:08:17.2 |
HIP 91238 |
11.06 |
| 2026-02-16 00:00 |
18:37:21.13 |
-20:07:39.1 |
HIP 91238 |
14.86 |
| 2026-02-16 12:00 |
18:37:48.56 |
-20:07:00.6 |
HIP 91238 |
20.07 |
| 2026-02-17 00:00 |
18:38:15.88 |
-20:06:21.8 |
HIP 91527 |
23.06 |
| 2026-02-17 12:00 |
18:38:43.11 |
-20:05:42.8 |
HIP 91527 |
16.63 |
| 2026-02-18 00:00 |
18:39:10.22 |
-20:05:03.4 |
HIP 91527 |
10.23 |
| 2026-02-18 12:00 |
18:39:37.22 |
-20:04:23.7 |
HIP 91527 |
3.87 |
| 2026-02-19 00:00 |
18:40:04.12 |
-20:03:43.8 |
HIP 91527 |
2.51 |
| 2026-02-19 12:00 |
18:40:30.90 |
-20:03:03.6 |
HIP 91527 |
8.83 |
| 2026-02-20 00:00 |
18:40:57.58 |
-20:02:23.0 |
HIP 91527 |
15.12 |
| 2026-02-20 12:00 |
18:41:24.14 |
-20:01:42.3 |
HIP 91527 |
21.40 |
| 2026-02-21 00:00 |
18:41:50.59 |
-20:01:01.2 |
HIP 91736 |
19.49 |
| 2026-02-21 12:00 |
18:42:16.92 |
-20:00:19.9 |
HIP 91736 |
18.49 |
| 2026-02-22 00:00 |
18:42:43.14 |
-19:59:38.3 |
HIP 91736 |
19.52 |
| 2026-02-22 12:00 |
18:43:09.24 |
-19:58:56.5 |
HIP 91736 |
22.29 |
| 2026-02-23 00:00 |
18:43:35.23 |
-19:58:14.4 |
HIP 91736 |
26.22 |
| 2026-02-23 12:00 |
18:44:01.10 |
-19:57:32.1 |
HIP 91736 |
30.86 |
| 2026-02-24 00:00 |
18:44:26.85 |
-19:56:49.6 |
HIP 92079 |
30.17 |