| Parameter |
Value |
| Designation |
C/2010 L3 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-11-10T11:09:03.124800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:44Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
4.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-12-11.0000000 |
| e |
0.99924162 |
| q (au) |
9.882907 |
| a (au) |
13031.539959 |
| i (deg) |
102.631072 |
| Ω (om, deg) |
38.275340 |
| ω (w, deg) |
121.773967 |
| M (ma, deg) |
0.000020 |
Magnitude
Scatter + Global Linear
$$
M_a = (3.629 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
3.629 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.799 |
| k |
0.801 |
| δ90 |
9.456 |
| 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) |
| 2026-06-01 00:00 |
11:31:00.25 |
-52:03:56.2 |
HIP 56317 |
17.05 |
| 2026-06-01 12:00 |
11:30:58.07 |
-52:03:08.3 |
HIP 56317 |
17.61 |
| 2026-06-02 00:00 |
11:30:55.94 |
-52:02:20.5 |
HIP 56317 |
18.19 |
| 2026-06-02 12:00 |
11:30:53.87 |
-52:01:32.7 |
HIP 56317 |
18.78 |
| 2026-06-03 00:00 |
11:30:51.85 |
-52:00:45.0 |
HIP 56317 |
19.38 |
| 2026-06-03 12:00 |
11:30:49.89 |
-51:59:57.4 |
HIP 56317 |
19.99 |
| 2026-06-04 00:00 |
11:30:47.97 |
-51:59:09.8 |
HIP 56317 |
20.62 |
| 2026-06-04 12:00 |
11:30:46.12 |
-51:58:22.3 |
HIP 56089 |
20.61 |
| 2026-06-05 00:00 |
11:30:44.31 |
-51:57:34.8 |
HIP 56089 |
19.77 |
| 2026-06-05 12:00 |
11:30:42.56 |
-51:56:47.5 |
HIP 56089 |
18.95 |
| 2026-06-06 00:00 |
11:30:40.87 |
-51:56:00.2 |
HIP 56089 |
18.12 |
| 2026-06-06 12:00 |
11:30:39.22 |
-51:55:13.0 |
HIP 56089 |
17.31 |
| 2026-06-07 00:00 |
11:30:37.63 |
-51:54:25.8 |
HIP 56089 |
16.50 |
| 2026-06-07 12:00 |
11:30:36.10 |
-51:53:38.8 |
HIP 56089 |
15.69 |
| 2026-06-08 00:00 |
11:30:34.62 |
-51:52:51.9 |
HIP 56089 |
14.90 |
| 2026-06-08 12:00 |
11:30:33.19 |
-51:52:05.0 |
HIP 56089 |
14.11 |
| 2026-06-09 00:00 |
11:30:31.82 |
-51:51:18.3 |
HIP 56089 |
13.33 |
| 2026-06-09 12:00 |
11:30:30.50 |
-51:50:31.7 |
HIP 56089 |
12.56 |
| 2026-06-10 00:00 |
11:30:29.23 |
-51:49:45.1 |
HIP 56089 |
11.79 |
| 2026-06-10 12:00 |
11:30:28.02 |
-51:48:58.7 |
HIP 56089 |
11.04 |
| 2026-06-11 00:00 |
11:30:26.86 |
-51:48:12.4 |
HIP 56089 |
10.31 |
| 2026-06-11 12:00 |
11:30:25.75 |
-51:47:26.3 |
HIP 56089 |
9.58 |
| 2026-06-12 00:00 |
11:30:24.70 |
-51:46:40.2 |
HIP 56089 |
8.88 |
| 2026-06-12 12:00 |
11:30:23.70 |
-51:45:54.3 |
HIP 56089 |
8.20 |
| 2026-06-13 00:00 |
11:30:22.75 |
-51:45:08.5 |
HIP 56089 |
7.54 |
| 2026-06-13 12:00 |
11:30:21.86 |
-51:44:22.9 |
HIP 56089 |
6.92 |
| 2026-06-14 00:00 |
11:30:21.02 |
-51:43:37.4 |
HIP 56089 |
6.34 |
| 2026-06-14 12:00 |
11:30:20.24 |
-51:42:52.0 |
HIP 56089 |
5.81 |
| 2026-06-15 00:00 |
11:30:19.50 |
-51:42:06.8 |
HIP 56089 |
5.35 |
| 2026-06-15 12:00 |
11:30:18.82 |
-51:41:21.8 |
HIP 56089 |
4.97 |
| 2026-06-16 00:00 |
11:30:18.20 |
-51:40:36.9 |
HIP 56089 |
4.69 |
| 2026-06-16 12:00 |
11:30:17.62 |
-51:39:52.2 |
HIP 56089 |
4.53 |
| 2026-06-17 00:00 |
11:30:17.10 |
-51:39:07.6 |
HIP 56089 |
4.50 |
| 2026-06-17 12:00 |
11:30:16.63 |
-51:38:23.2 |
HIP 56089 |
4.60 |
| 2026-06-18 00:00 |
11:30:16.22 |
-51:37:39.0 |
HIP 56089 |
4.82 |
| 2026-06-18 12:00 |
11:30:15.85 |
-51:36:55.0 |
HIP 56089 |
5.14 |
| 2026-06-19 00:00 |
11:30:15.54 |
-51:36:11.1 |
HIP 56089 |
5.54 |
| 2026-06-19 12:00 |
11:30:15.28 |
-51:35:27.4 |
HIP 56089 |
6.01 |
| 2026-06-20 00:00 |
11:30:15.07 |
-51:34:43.9 |
HIP 56089 |
6.54 |
| 2026-06-20 12:00 |
11:30:14.92 |
-51:34:00.6 |
HIP 56089 |
7.10 |
| 2026-06-21 00:00 |
11:30:14.81 |
-51:33:17.5 |
HIP 56089 |
7.68 |
| 2026-06-21 12:00 |
11:30:14.76 |
-51:32:34.6 |
HIP 56089 |
8.29 |
| 2026-06-22 00:00 |
11:30:14.75 |
-51:31:51.9 |
HIP 56089 |
8.92 |