| 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) |
| 2026-06-01 00:00 |
19:13:01.71 |
-18:08:28.0 |
HIP 94296 |
20.97 |
| 2026-06-01 12:00 |
19:12:50.34 |
-18:08:30.7 |
HIP 94296 |
18.33 |
| 2026-06-02 00:00 |
19:12:38.79 |
-18:08:33.9 |
HIP 94296 |
15.65 |
| 2026-06-02 12:00 |
19:12:27.05 |
-18:08:37.6 |
HIP 94296 |
12.97 |
| 2026-06-03 00:00 |
19:12:15.12 |
-18:08:41.8 |
HIP 94296 |
10.29 |
| 2026-06-03 12:00 |
19:12:03.02 |
-18:08:46.4 |
HIP 94296 |
7.68 |
| 2026-06-04 00:00 |
19:11:50.73 |
-18:08:51.5 |
HIP 94296 |
5.33 |
| 2026-06-04 12:00 |
19:11:38.26 |
-18:08:57.1 |
HIP 94296 |
3.83 |
| 2026-06-05 00:00 |
19:11:25.61 |
-18:09:03.1 |
HIP 94296 |
4.32 |
| 2026-06-05 12:00 |
19:11:12.79 |
-18:09:09.6 |
HIP 94296 |
6.41 |
| 2026-06-06 00:00 |
19:10:59.80 |
-18:09:16.6 |
HIP 94296 |
9.10 |
| 2026-06-06 12:00 |
19:10:46.63 |
-18:09:24.0 |
HIP 94296 |
12.01 |
| 2026-06-07 00:00 |
19:10:33.29 |
-18:09:31.9 |
HIP 94296 |
15.06 |
| 2026-06-07 12:00 |
19:10:19.78 |
-18:09:40.2 |
HIP 94296 |
18.18 |
| 2026-06-08 00:00 |
19:10:06.11 |
-18:09:49.0 |
HIP 94296 |
21.37 |
| 2026-06-08 12:00 |
19:09:52.28 |
-18:09:58.2 |
HIP 94296 |
24.61 |
| 2026-06-09 00:00 |
19:09:38.28 |
-18:10:07.9 |
HIP 94296 |
27.90 |
| 2026-06-09 12:00 |
19:09:24.12 |
-18:10:18.1 |
HIP 94296 |
31.24 |
| 2026-06-10 00:00 |
19:09:09.80 |
-18:10:28.6 |
HIP 94062 |
30.63 |
| 2026-06-10 12:00 |
19:08:55.33 |
-18:10:39.6 |
HIP 94062 |
30.30 |
| 2026-06-11 00:00 |
19:08:40.71 |
-18:10:51.1 |
HIP 94062 |
30.36 |
| 2026-06-11 12:00 |
19:08:25.93 |
-18:11:03.0 |
HIP 94062 |
30.81 |
| 2026-06-12 00:00 |
19:08:11.01 |
-18:11:15.3 |
HIP 94062 |
31.65 |
| 2026-06-12 12:00 |
19:07:55.94 |
-18:11:28.0 |
HIP 93934 |
32.40 |
| 2026-06-13 00:00 |
19:07:40.72 |
-18:11:41.1 |
HIP 93934 |
31.90 |
| 2026-06-13 12:00 |
19:07:25.37 |
-18:11:54.7 |
HIP 93934 |
31.80 |
| 2026-06-14 00:00 |
19:07:09.88 |
-18:12:08.7 |
HIP 93934 |
32.12 |
| 2026-06-14 12:00 |
19:06:54.25 |
-18:12:23.1 |
HIP 93887 |
32.08 |
| 2026-06-15 00:00 |
19:06:38.50 |
-18:12:37.8 |
HIP 93887 |
32.44 |
| 2026-06-15 12:00 |
19:06:22.61 |
-18:12:53.0 |
HIP 93887 |
33.22 |
| 2026-06-16 00:00 |
19:06:06.60 |
-18:13:08.6 |
HIP 93693 |
31.45 |
| 2026-06-16 12:00 |
19:05:50.46 |
-18:13:24.6 |
HIP 93693 |
29.52 |
| 2026-06-17 00:00 |
19:05:34.21 |
-18:13:40.9 |
HIP 93693 |
27.98 |
| 2026-06-17 12:00 |
19:05:17.83 |
-18:13:57.6 |
HIP 93693 |
26.91 |
| 2026-06-18 00:00 |
19:05:01.35 |
-18:14:14.7 |
HIP 93693 |
26.38 |
| 2026-06-18 12:00 |
19:04:44.75 |
-18:14:32.2 |
HIP 93693 |
26.44 |
| 2026-06-19 00:00 |
19:04:28.04 |
-18:14:50.0 |
HIP 93693 |
27.10 |
| 2026-06-19 12:00 |
19:04:11.23 |
-18:15:08.2 |
HIP 93693 |
28.31 |
| 2026-06-20 00:00 |
19:03:54.32 |
-18:15:26.8 |
HIP 93696 |
29.85 |
| 2026-06-20 12:00 |
19:03:37.31 |
-18:15:45.7 |
HIP 93644 |
31.03 |
| 2026-06-21 00:00 |
19:03:20.21 |
-18:16:04.9 |
HIP 93644 |
32.55 |
| 2026-06-21 12:00 |
19:03:03.01 |
-18:16:24.4 |
HIP 93644 |
34.50 |
| 2026-06-22 00:00 |
19:02:45.72 |
-18:16:44.3 |
HIP 93644 |
36.83 |