| 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) |
| 2026-05-12 00:00 |
12:52:14.93 |
-20:14:32.3 |
HIP 62900 |
28.18 |
| 2026-05-12 12:00 |
12:52:10.92 |
-20:13:59.6 |
HIP 62900 |
28.36 |
| 2026-05-13 00:00 |
12:52:06.94 |
-20:13:26.9 |
HIP 62642 |
28.49 |
| 2026-05-13 12:00 |
12:52:02.98 |
-20:12:54.3 |
HIP 62642 |
27.78 |
| 2026-05-14 00:00 |
12:51:59.05 |
-20:12:21.6 |
HIP 62642 |
27.10 |
| 2026-05-14 12:00 |
12:51:55.15 |
-20:11:49.0 |
HIP 62642 |
26.45 |
| 2026-05-15 00:00 |
12:51:51.27 |
-20:11:16.5 |
HIP 62642 |
25.83 |
| 2026-05-15 12:00 |
12:51:47.42 |
-20:10:44.0 |
HIP 62642 |
25.24 |
| 2026-05-16 00:00 |
12:51:43.60 |
-20:10:11.5 |
HIP 62642 |
24.70 |
| 2026-05-16 12:00 |
12:51:39.81 |
-20:09:39.0 |
HIP 62642 |
24.19 |
| 2026-05-17 00:00 |
12:51:36.04 |
-20:09:06.7 |
HIP 62642 |
23.72 |
| 2026-05-17 12:00 |
12:51:32.30 |
-20:08:34.3 |
HIP 62642 |
23.29 |
| 2026-05-18 00:00 |
12:51:28.59 |
-20:08:02.0 |
HIP 62642 |
22.91 |
| 2026-05-18 12:00 |
12:51:24.91 |
-20:07:29.8 |
HIP 62642 |
22.57 |
| 2026-05-19 00:00 |
12:51:21.26 |
-20:06:57.6 |
HIP 62642 |
22.28 |
| 2026-05-19 12:00 |
12:51:17.63 |
-20:06:25.5 |
HIP 62642 |
22.03 |
| 2026-05-20 00:00 |
12:51:14.04 |
-20:05:53.4 |
HIP 62642 |
21.83 |
| 2026-05-20 12:00 |
12:51:10.47 |
-20:05:21.4 |
HIP 62642 |
21.67 |
| 2026-05-21 00:00 |
12:51:06.94 |
-20:04:49.5 |
HIP 62642 |
21.57 |
| 2026-05-21 12:00 |
12:51:03.43 |
-20:04:17.7 |
HIP 62642 |
21.51 |
| 2026-05-22 00:00 |
12:50:59.95 |
-20:03:45.9 |
HIP 62642 |
21.50 |
| 2026-05-22 12:00 |
12:50:56.51 |
-20:03:14.2 |
HIP 62642 |
21.54 |
| 2026-05-23 00:00 |
12:50:53.09 |
-20:02:42.5 |
HIP 62642 |
21.62 |
| 2026-05-23 12:00 |
12:50:49.71 |
-20:02:11.0 |
HIP 62642 |
21.75 |
| 2026-05-24 00:00 |
12:50:46.35 |
-20:01:39.5 |
HIP 62642 |
21.91 |
| 2026-05-24 12:00 |
12:50:43.03 |
-20:01:08.1 |
HIP 62642 |
22.12 |
| 2026-05-25 00:00 |
12:50:39.74 |
-20:00:36.8 |
HIP 62642 |
22.37 |
| 2026-05-25 12:00 |
12:50:36.48 |
-20:00:05.6 |
HIP 62642 |
22.65 |
| 2026-05-26 00:00 |
12:50:33.25 |
-19:59:34.5 |
HIP 62642 |
22.97 |
| 2026-05-26 12:00 |
12:50:30.05 |
-19:59:03.5 |
HIP 62642 |
23.31 |
| 2026-05-27 00:00 |
12:50:26.89 |
-19:58:32.5 |
HIP 62642 |
23.69 |
| 2026-05-27 12:00 |
12:50:23.76 |
-19:58:01.7 |
HIP 62642 |
24.10 |
| 2026-05-28 00:00 |
12:50:20.65 |
-19:57:30.9 |
HIP 62642 |
24.53 |
| 2026-05-28 12:00 |
12:50:17.58 |
-19:57:00.3 |
HIP 62642 |
24.98 |
| 2026-05-29 00:00 |
12:50:14.55 |
-19:56:29.8 |
HIP 62642 |
25.46 |
| 2026-05-29 12:00 |
12:50:11.54 |
-19:55:59.3 |
HIP 62642 |
25.95 |
| 2026-05-30 00:00 |
12:50:08.57 |
-19:55:29.0 |
HIP 62642 |
26.46 |
| 2026-05-30 12:00 |
12:50:05.63 |
-19:54:58.8 |
HIP 62642 |
26.99 |
| 2026-05-31 00:00 |
12:50:02.73 |
-19:54:28.7 |
HIP 62642 |
27.53 |
| 2026-05-31 12:00 |
12:49:59.85 |
-19:53:58.7 |
HIP 62642 |
28.08 |
| 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 |