| Parameter |
Value |
| Designation |
C/1993 K1 (Shoemaker-Levy) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-02-02T01:24:00.826560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:46Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
1994-07-30.0000000 |
| e |
1.00011336 |
| q (au) |
4.849378 |
| a (au) |
-42777.594887 |
| i (deg) |
67.766845 |
| Ω (om, deg) |
30.328734 |
| ω (w, deg) |
232.460115 |
| M (ma, deg) |
0.000020 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.159 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.159 |
| n |
2.000 |
| gf |
0.998 |
| gb |
-0.538 |
| k |
0.800 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
02:00:00.02 |
+29:17:25.1 |
HIP 9417 |
13.35 |
| 2026-07-29 12:00 |
01:59:59.86 |
+29:17:36.0 |
HIP 9417 |
13.43 |
| 2026-07-30 00:00 |
01:59:59.67 |
+29:17:46.8 |
HIP 9417 |
13.51 |
| 2026-07-30 12:00 |
01:59:59.46 |
+29:17:57.5 |
HIP 9417 |
13.60 |
| 2026-07-31 00:00 |
01:59:59.23 |
+29:18:08.1 |
HIP 9417 |
13.70 |
| 2026-07-31 12:00 |
01:59:58.98 |
+29:18:18.6 |
HIP 9417 |
13.80 |
| 2026-08-01 00:00 |
01:59:58.72 |
+29:18:29.0 |
HIP 9417 |
13.91 |
| 2026-08-01 12:00 |
01:59:58.43 |
+29:18:39.4 |
HIP 9417 |
14.02 |
| 2026-08-02 00:00 |
01:59:58.12 |
+29:18:49.6 |
HIP 9417 |
14.14 |
| 2026-08-02 12:00 |
01:59:57.79 |
+29:18:59.7 |
HIP 9417 |
14.26 |
| 2026-08-03 00:00 |
01:59:57.45 |
+29:19:09.7 |
HIP 9417 |
14.39 |
| 2026-08-03 12:00 |
01:59:57.08 |
+29:19:19.7 |
HIP 9417 |
14.52 |
| 2026-08-04 00:00 |
01:59:56.69 |
+29:19:29.5 |
HIP 9417 |
14.65 |
| 2026-08-04 12:00 |
01:59:56.28 |
+29:19:39.2 |
HIP 9417 |
14.80 |
| 2026-08-05 00:00 |
01:59:55.85 |
+29:19:48.8 |
HIP 9417 |
14.94 |
| 2026-08-05 12:00 |
01:59:55.40 |
+29:19:58.3 |
HIP 9417 |
15.09 |
| 2026-08-06 00:00 |
01:59:54.94 |
+29:20:07.8 |
HIP 9417 |
15.24 |
| 2026-08-06 12:00 |
01:59:54.45 |
+29:20:17.1 |
HIP 9417 |
15.40 |
| 2026-08-07 00:00 |
01:59:53.94 |
+29:20:26.3 |
HIP 9417 |
15.56 |
| 2026-08-07 12:00 |
01:59:53.41 |
+29:20:35.4 |
HIP 9417 |
15.73 |
| 2026-08-08 00:00 |
01:59:52.86 |
+29:20:44.3 |
HIP 9417 |
15.90 |
| 2026-08-08 12:00 |
01:59:52.29 |
+29:20:53.2 |
HIP 9417 |
16.07 |
| 2026-08-09 00:00 |
01:59:51.71 |
+29:21:02.0 |
HIP 9417 |
16.25 |
| 2026-08-09 12:00 |
01:59:51.10 |
+29:21:10.7 |
HIP 9417 |
16.43 |
| 2026-08-10 00:00 |
01:59:50.47 |
+29:21:19.2 |
HIP 9417 |
16.61 |
| 2026-08-10 12:00 |
01:59:49.82 |
+29:21:27.7 |
HIP 9417 |
16.80 |
| 2026-08-11 00:00 |
01:59:49.15 |
+29:21:36.0 |
HIP 9417 |
16.99 |
| 2026-08-11 12:00 |
01:59:48.46 |
+29:21:44.2 |
HIP 9417 |
17.19 |
| 2026-08-12 00:00 |
01:59:47.76 |
+29:21:52.3 |
HIP 9417 |
17.38 |
| 2026-08-12 12:00 |
01:59:47.03 |
+29:22:00.3 |
HIP 9417 |
17.59 |
| 2026-08-13 00:00 |
01:59:46.28 |
+29:22:08.2 |
HIP 9417 |
17.79 |
| 2026-08-13 12:00 |
01:59:45.51 |
+29:22:16.0 |
HIP 9417 |
18.00 |
| 2026-08-14 00:00 |
01:59:44.73 |
+29:22:23.7 |
HIP 9417 |
18.21 |
| 2026-08-14 12:00 |
01:59:43.92 |
+29:22:31.2 |
HIP 9417 |
18.42 |
| 2026-08-15 00:00 |
01:59:43.10 |
+29:22:38.6 |
HIP 9417 |
18.64 |
| 2026-08-15 12:00 |
01:59:42.25 |
+29:22:46.0 |
HIP 9417 |
18.86 |
| 2026-08-16 00:00 |
01:59:41.39 |
+29:22:53.2 |
HIP 9417 |
19.08 |
| 2026-08-16 12:00 |
01:59:40.50 |
+29:23:00.2 |
HIP 9417 |
19.30 |
| 2026-08-17 00:00 |
01:59:39.60 |
+29:23:07.2 |
HIP 9417 |
19.53 |
| 2026-08-17 12:00 |
01:59:38.68 |
+29:23:14.1 |
HIP 9417 |
19.76 |
| 2026-08-18 00:00 |
01:59:37.73 |
+29:23:20.8 |
HIP 9417 |
19.99 |
| 2026-08-18 12:00 |
01:59:36.77 |
+29:23:27.4 |
HIP 9417 |
20.23 |
| 2026-08-19 00:00 |
01:59:35.79 |
+29:23:33.9 |
HIP 9417 |
20.47 |