| Parameter |
Value |
| Designation |
367P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-11-29T20:09:13.155840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:37Z |
| Obs used |
129 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-04-12.0000000 |
| e |
0.27988242 |
| q (au) |
2.528309 |
| a (au) |
3.510967 |
| i (deg) |
8.459533 |
| Ω (om, deg) |
58.741477 |
| ω (w, deg) |
173.479131 |
| M (ma, deg) |
20.099623 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.113 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.113 |
| n |
2.000 |
| gf |
0.973 |
| gb |
-0.509 |
| k |
1.000 |
| δ90 |
9.568 |
| 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) |
| 2026-03-26 00:00 |
22:46:27.12 |
-15:05:02.1 |
HIP 112526 |
16.03 |
| 2026-03-26 12:00 |
22:47:05.36 |
-15:01:36.4 |
HIP 112526 |
9.11 |
| 2026-03-27 00:00 |
22:47:43.53 |
-14:58:11.1 |
HIP 112526 |
10.13 |
| 2026-03-27 12:00 |
22:48:21.61 |
-14:54:46.2 |
HIP 112526 |
17.75 |
| 2026-03-28 00:00 |
22:48:59.60 |
-14:51:21.8 |
HIP 112797 |
23.89 |
| 2026-03-28 12:00 |
22:49:37.52 |
-14:47:57.7 |
HIP 112797 |
14.13 |
| 2026-03-29 00:00 |
22:50:15.35 |
-14:44:34.0 |
HIP 112797 |
4.44 |
| 2026-03-29 12:00 |
22:50:53.09 |
-14:41:10.8 |
HIP 112797 |
5.46 |
| 2026-03-30 00:00 |
22:51:30.75 |
-14:37:48.0 |
HIP 112920 |
14.58 |
| 2026-03-30 12:00 |
22:52:08.33 |
-14:34:25.6 |
HIP 112920 |
8.53 |
| 2026-03-31 00:00 |
22:52:45.82 |
-14:31:03.6 |
HIP 112920 |
10.98 |
| 2026-03-31 12:00 |
22:53:23.22 |
-14:27:42.1 |
HIP 113020 |
12.10 |
| 2026-04-01 00:00 |
22:54:00.54 |
-14:24:21.1 |
HIP 113020 |
13.79 |
| 2026-04-01 12:00 |
22:54:37.78 |
-14:21:00.5 |
HIP 113020 |
20.47 |
| 2026-04-02 00:00 |
22:55:14.93 |
-14:17:40.3 |
HIP 113020 |
28.84 |
| 2026-04-02 12:00 |
22:55:51.99 |
-14:14:20.6 |
HIP 113378 |
29.75 |
| 2026-04-03 00:00 |
22:56:28.97 |
-14:11:01.4 |
HIP 113395 |
21.74 |
| 2026-04-03 12:00 |
22:57:05.86 |
-14:07:42.7 |
HIP 113395 |
15.33 |
| 2026-04-04 00:00 |
22:57:42.66 |
-14:04:24.5 |
HIP 113395 |
13.39 |
| 2026-04-04 12:00 |
22:58:19.37 |
-14:01:06.7 |
HIP 113395 |
17.44 |
| 2026-04-05 00:00 |
22:58:56.00 |
-13:57:49.5 |
HIP 113409 |
22.79 |
| 2026-04-05 12:00 |
22:59:32.54 |
-13:54:32.7 |
HIP 113409 |
26.39 |
| 2026-04-06 00:00 |
23:00:08.99 |
-13:51:16.5 |
HIP 113631 |
25.99 |
| 2026-04-06 12:00 |
23:00:45.35 |
-13:48:00.8 |
HIP 113631 |
27.49 |
| 2026-04-07 00:00 |
23:01:21.62 |
-13:44:45.6 |
HIP 113675 |
31.56 |
| 2026-04-07 12:00 |
23:01:57.80 |
-13:41:30.9 |
HIP 113810 |
24.96 |
| 2026-04-08 00:00 |
23:02:33.89 |
-13:38:16.8 |
HIP 113810 |
18.49 |
| 2026-04-08 12:00 |
23:03:09.89 |
-13:35:03.2 |
HIP 113810 |
15.36 |
| 2026-04-09 00:00 |
23:03:45.80 |
-13:31:50.1 |
HIP 113810 |
17.42 |
| 2026-04-09 12:00 |
23:04:21.62 |
-13:28:37.6 |
HIP 113810 |
23.31 |
| 2026-04-10 00:00 |
23:04:57.35 |
-13:25:25.7 |
HIP 114094 |
29.97 |
| 2026-04-10 12:00 |
23:05:32.98 |
-13:22:14.4 |
HIP 114094 |
26.79 |
| 2026-04-11 00:00 |
23:06:08.52 |
-13:19:03.6 |
HIP 114094 |
26.59 |
| 2026-04-11 12:00 |
23:06:43.97 |
-13:15:53.4 |
HIP 114094 |
29.42 |
| 2026-04-12 00:00 |
23:07:19.32 |
-13:12:43.9 |
HIP 114143 |
29.33 |
| 2026-04-12 12:00 |
23:07:54.58 |
-13:09:34.9 |
HIP 114143 |
29.09 |
| 2026-04-13 00:00 |
23:08:29.74 |
-13:06:26.5 |
HIP 114426 |
30.66 |
| 2026-04-13 12:00 |
23:09:04.81 |
-13:03:18.7 |
HIP 114426 |
24.86 |
| 2026-04-14 00:00 |
23:09:39.78 |
-13:00:11.6 |
HIP 114426 |
21.49 |
| 2026-04-14 12:00 |
23:10:14.65 |
-12:57:05.1 |
HIP 114426 |
21.66 |
| 2026-04-15 00:00 |
23:10:49.43 |
-12:53:59.3 |
HIP 114499 |
14.41 |
| 2026-04-15 12:00 |
23:11:24.11 |
-12:50:54.1 |
HIP 114499 |
8.80 |
| 2026-04-16 00:00 |
23:11:58.69 |
-12:47:49.5 |
HIP 114499 |
10.44 |