145P/Shoemaker-Levy 5
Metadata
| Parameter | Value |
|---|---|
| Designation | 145P/Shoemaker-Levy 5 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2017-08-31T17:52:17.993280Z |
| Orbit solution date (soln_date, UTC) | 2026-03-31T09:42:36Z |
| Obs used | 1419 |
| NEO | - |
| M1 | 11.400 |
| K1 | 15.500 |
| PC | 0.030 |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2019-09-23.0000000 |
| e | 0.54063599 |
| q (au) | 1.902617 |
| a (au) | 4.141850 |
| i (deg) | 11.261855 |
| Ω (om, deg) | 26.797261 |
| ω (w, deg) | 10.298662 |
| M (ma, deg) | 87.958513 |
Magnitude
Scatter + Global Linear
$$ M_a = (10.649 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 10.649 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.500 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) | End (UTC) | a | b |
|---|---|---|---|
| 2025-06-23 | 2026-02-26 | +8.2296 | -2.716 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Finding Chart
Ephemeris
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 02:35:07.16 | +20:11:06.8 | HIP 12097 | 10.99 |
| 2026-03-26 12:00 | 02:36:19.85 | +20:18:02.8 | HIP 12097 | 7.91 |
| 2026-03-27 00:00 | 02:37:32.62 | +20:24:57.0 | HIP 12238 | 9.56 |
| 2026-03-27 12:00 | 02:38:45.47 | +20:31:49.3 | HIP 12238 | 16.86 |
| 2026-03-28 00:00 | 02:39:58.41 | +20:38:39.6 | HIP 12591 | 28.52 |
| 2026-03-28 12:00 | 02:41:11.42 | +20:45:28.0 | HIP 12591 | 10.45 |
| 2026-03-29 00:00 | 02:42:24.51 | +20:52:14.4 | HIP 12591 | 8.97 |
| 2026-03-29 12:00 | 02:43:37.68 | +20:58:58.9 | HIP 12733 | 9.88 |
| 2026-03-30 00:00 | 02:44:50.92 | +21:05:41.3 | HIP 12733 | 16.59 |
| 2026-03-30 12:00 | 02:46:04.25 | +21:12:21.8 | HIP 13029 | 21.23 |
| 2026-03-31 00:00 | 02:47:17.65 | +21:19:00.3 | HIP 13029 | 2.96 |
| 2026-03-31 12:00 | 02:48:31.13 | +21:25:36.8 | HIP 13152 | 13.41 |
| 2026-04-01 00:00 | 02:49:44.68 | +21:32:11.2 | HIP 13152 | 18.58 |
| 2026-04-01 12:00 | 02:50:58.32 | +21:38:43.6 | HIP 13253 | 28.67 |
| 2026-04-02 00:00 | 02:52:12.02 | +21:45:14.0 | HIP 13253 | 31.37 |
| 2026-04-02 12:00 | 02:53:25.80 | +21:51:42.3 | HIP 13589 | 28.00 |
| 2026-04-03 00:00 | 02:54:39.66 | +21:58:08.6 | HIP 13589 | 23.17 |
| 2026-04-03 12:00 | 02:55:53.59 | +22:04:32.7 | HIP 13589 | 30.97 |
| 2026-04-04 00:00 | 02:57:07.59 | +22:10:54.8 | HIP 13890 | 26.39 |
| 2026-04-04 12:00 | 02:58:21.67 | +22:17:14.8 | HIP 13890 | 18.36 |
| 2026-04-05 00:00 | 02:59:35.81 | +22:23:32.7 | HIP 13890 | 25.40 |
| 2026-04-05 12:00 | 03:00:50.03 | +22:29:48.5 | HIP 14024 | 20.18 |
| 2026-04-06 00:00 | 03:02:04.33 | +22:36:02.1 | HIP 14152 | 14.62 |
| 2026-04-06 12:00 | 03:03:18.69 | +22:42:13.6 | HIP 14211 | 20.08 |
| 2026-04-07 00:00 | 03:04:33.12 | +22:48:23.0 | HIP 14230 | 21.33 |
| 2026-04-07 12:00 | 03:05:47.63 | +22:54:30.2 | HIP 14394 | 11.24 |
| 2026-04-08 00:00 | 03:07:02.20 | +23:00:35.2 | HIP 14394 | 19.35 |
| 2026-04-08 12:00 | 03:08:16.84 | +23:06:38.1 | HIP 14572 | 27.13 |
| 2026-04-09 00:00 | 03:09:31.55 | +23:12:38.8 | HIP 14554 | 36.60 |
| 2026-04-09 12:00 | 03:10:46.33 | +23:18:37.3 | HIP 14908 | 34.31 |
| 2026-04-10 00:00 | 03:12:01.18 | +23:24:33.6 | HIP 14908 | 32.19 |
| 2026-04-10 12:00 | 03:13:16.09 | +23:30:27.7 | HIP 14847 | 35.61 |
| 2026-04-11 00:00 | 03:14:31.07 | +23:36:19.6 | HIP 15072 | 39.23 |
| 2026-04-11 12:00 | 03:15:46.11 | +23:42:09.2 | HIP 15278 | 27.12 |
| 2026-04-12 00:00 | 03:17:01.22 | +23:47:56.6 | HIP 15278 | 14.22 |
| 2026-04-12 12:00 | 03:18:16.39 | +23:53:41.7 | HIP 15380 | 11.25 |
| 2026-04-13 00:00 | 03:19:31.63 | +23:59:24.7 | HIP 15380 | 17.26 |
| 2026-04-13 12:00 | 03:20:46.92 | +24:05:05.3 | HIP 15552 | 24.44 |
| 2026-04-14 00:00 | 03:22:02.28 | +24:10:43.7 | HIP 15560 | 30.83 |
| 2026-04-14 12:00 | 03:23:17.70 | +24:16:19.7 | HIP 15861 | 30.44 |
| 2026-04-15 00:00 | 03:24:33.18 | +24:21:53.5 | HIP 15861 | 21.82 |
| 2026-04-15 12:00 | 03:25:48.71 | +24:27:25.0 | HIP 16074 | 18.31 |
| 2026-04-16 00:00 | 03:27:04.31 | +24:32:54.2 | HIP 16074 | 13.29 |