| Parameter |
Value |
| Designation |
C/2014 M3 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-06-21T22:25:14.257920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:56Z |
| Obs used |
90 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-07-27.0000000 |
| e |
0.98235311 |
| q (au) |
2.434267 |
| a (au) |
137.943094 |
| i (deg) |
164.909650 |
| Ω (om, deg) |
80.367465 |
| ω (w, deg) |
93.740309 |
| M (ma, deg) |
0.021332 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.691 + 4.806\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.691 |
| n |
4.806 |
| gf |
1.000 |
| gb |
-0.540 |
| 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) |
| 2026-06-01 00:00 |
12:49:57.01 |
-19:53:28.8 |
HIP 62642 |
28.65 |
| 2026-06-01 12:00 |
12:49:54.21 |
-19:52:59.0 |
HIP 62518 |
28.12 |
| 2026-06-02 00:00 |
12:49:51.44 |
-19:52:29.4 |
HIP 62518 |
27.33 |
| 2026-06-02 12:00 |
12:49:48.70 |
-19:51:59.9 |
HIP 62518 |
26.56 |
| 2026-06-03 00:00 |
12:49:45.99 |
-19:51:30.5 |
HIP 62518 |
25.79 |
| 2026-06-03 12:00 |
12:49:43.32 |
-19:51:01.2 |
HIP 62518 |
25.03 |
| 2026-06-04 00:00 |
12:49:40.68 |
-19:50:32.0 |
HIP 62518 |
24.28 |
| 2026-06-04 12:00 |
12:49:38.08 |
-19:50:03.0 |
HIP 62518 |
23.54 |
| 2026-06-05 00:00 |
12:49:35.51 |
-19:49:34.1 |
HIP 62518 |
22.81 |
| 2026-06-05 12:00 |
12:49:32.97 |
-19:49:05.4 |
HIP 62518 |
22.09 |
| 2026-06-06 00:00 |
12:49:30.47 |
-19:48:36.8 |
HIP 62518 |
21.37 |
| 2026-06-06 12:00 |
12:49:28.01 |
-19:48:08.3 |
HIP 62518 |
20.67 |
| 2026-06-07 00:00 |
12:49:25.58 |
-19:47:39.9 |
HIP 62518 |
19.97 |
| 2026-06-07 12:00 |
12:49:23.18 |
-19:47:11.7 |
HIP 62518 |
19.29 |
| 2026-06-08 00:00 |
12:49:20.82 |
-19:46:43.7 |
HIP 62518 |
18.61 |
| 2026-06-08 12:00 |
12:49:18.50 |
-19:46:15.8 |
HIP 62518 |
17.94 |
| 2026-06-09 00:00 |
12:49:16.21 |
-19:45:48.0 |
HIP 62518 |
17.28 |
| 2026-06-09 12:00 |
12:49:13.95 |
-19:45:20.4 |
HIP 62518 |
16.64 |
| 2026-06-10 00:00 |
12:49:11.73 |
-19:44:52.9 |
HIP 62518 |
16.00 |
| 2026-06-10 12:00 |
12:49:09.55 |
-19:44:25.6 |
HIP 62518 |
15.38 |
| 2026-06-11 00:00 |
12:49:07.40 |
-19:43:58.4 |
HIP 62518 |
14.76 |
| 2026-06-11 12:00 |
12:49:05.28 |
-19:43:31.4 |
HIP 62518 |
14.16 |
| 2026-06-12 00:00 |
12:49:03.21 |
-19:43:04.6 |
HIP 62518 |
13.57 |
| 2026-06-12 12:00 |
12:49:01.17 |
-19:42:37.9 |
HIP 62518 |
12.99 |
| 2026-06-13 00:00 |
12:48:59.16 |
-19:42:11.4 |
HIP 62518 |
12.42 |
| 2026-06-13 12:00 |
12:48:57.19 |
-19:41:45.0 |
HIP 62518 |
11.87 |
| 2026-06-14 00:00 |
12:48:55.26 |
-19:41:18.8 |
HIP 62518 |
11.33 |
| 2026-06-14 12:00 |
12:48:53.37 |
-19:40:52.8 |
HIP 62518 |
10.80 |
| 2026-06-15 00:00 |
12:48:51.51 |
-19:40:26.9 |
HIP 62518 |
10.29 |
| 2026-06-15 12:00 |
12:48:49.69 |
-19:40:01.3 |
HIP 62518 |
9.80 |
| 2026-06-16 00:00 |
12:48:47.90 |
-19:39:35.8 |
HIP 62518 |
9.32 |
| 2026-06-16 12:00 |
12:48:46.15 |
-19:39:10.4 |
HIP 62518 |
8.86 |
| 2026-06-17 00:00 |
12:48:44.44 |
-19:38:45.3 |
HIP 62518 |
8.42 |
| 2026-06-17 12:00 |
12:48:42.76 |
-19:38:20.3 |
HIP 62518 |
8.00 |
| 2026-06-18 00:00 |
12:48:41.12 |
-19:37:55.5 |
HIP 62518 |
7.61 |
| 2026-06-18 12:00 |
12:48:39.52 |
-19:37:30.9 |
HIP 62518 |
7.24 |
| 2026-06-19 00:00 |
12:48:37.96 |
-19:37:06.5 |
HIP 62518 |
6.89 |
| 2026-06-19 12:00 |
12:48:36.43 |
-19:36:42.2 |
HIP 62518 |
6.58 |
| 2026-06-20 00:00 |
12:48:34.94 |
-19:36:18.2 |
HIP 62518 |
6.29 |
| 2026-06-20 12:00 |
12:48:33.48 |
-19:35:54.3 |
HIP 62518 |
6.04 |
| 2026-06-21 00:00 |
12:48:32.07 |
-19:35:30.6 |
HIP 62518 |
5.82 |
| 2026-06-21 12:00 |
12:48:30.69 |
-19:35:07.2 |
HIP 62518 |
5.64 |
| 2026-06-22 00:00 |
12:48:29.34 |
-19:34:43.9 |
HIP 62518 |
5.50 |