C/2014 J1 (Catalina)
| Parameter |
Value |
| Designation |
C/2014 J1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-06-20T00:22:18.560640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:54Z |
| Obs used |
103 |
| NEO |
- |
| M1 |
16.800 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-05-17.0000000 |
| e |
0.80239339 |
| q (au) |
1.708541 |
| a (au) |
8.646176 |
| i (deg) |
159.696475 |
| Ω (om, deg) |
41.942129 |
| ω (w, deg) |
195.480026 |
| M (ma, deg) |
358.681304 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.181 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.181 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.553 |
| 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) |
| 2026-02-03 00:00 |
01:32:30.65 |
+14:16:46.2 |
HIP 7172 |
0.63 |
| 2026-02-03 12:00 |
01:32:32.12 |
+14:16:50.4 |
HIP 7172 |
0.91 |
| 2026-02-04 00:00 |
01:32:33.64 |
+14:16:55.0 |
HIP 7172 |
1.24 |
| 2026-02-04 12:00 |
01:32:35.22 |
+14:17:00.0 |
HIP 7172 |
1.61 |
| 2026-02-05 00:00 |
01:32:36.86 |
+14:17:05.2 |
HIP 7172 |
2.00 |
| 2026-02-05 12:00 |
01:32:38.56 |
+14:17:10.9 |
HIP 7172 |
2.41 |
| 2026-02-06 00:00 |
01:32:40.31 |
+14:17:16.9 |
HIP 7172 |
2.84 |
| 2026-02-06 12:00 |
01:32:42.12 |
+14:17:23.2 |
HIP 7172 |
3.28 |
| 2026-02-07 00:00 |
01:32:43.99 |
+14:17:29.9 |
HIP 7172 |
3.74 |
| 2026-02-07 12:00 |
01:32:45.91 |
+14:17:37.0 |
HIP 7172 |
4.22 |
| 2026-02-08 00:00 |
01:32:47.89 |
+14:17:44.4 |
HIP 7172 |
4.71 |
| 2026-02-08 12:00 |
01:32:49.93 |
+14:17:52.2 |
HIP 7172 |
5.22 |
| 2026-02-09 00:00 |
01:32:52.02 |
+14:18:00.3 |
HIP 7172 |
5.74 |
| 2026-02-09 12:00 |
01:32:54.17 |
+14:18:08.8 |
HIP 7172 |
6.27 |
| 2026-02-10 00:00 |
01:32:56.37 |
+14:18:17.6 |
HIP 7172 |
6.82 |
| 2026-02-10 12:00 |
01:32:58.63 |
+14:18:26.8 |
HIP 7172 |
7.39 |
| 2026-02-11 00:00 |
01:33:00.94 |
+14:18:36.3 |
HIP 7172 |
7.97 |
| 2026-02-11 12:00 |
01:33:03.30 |
+14:18:46.2 |
HIP 7172 |
8.56 |
| 2026-02-12 00:00 |
01:33:05.72 |
+14:18:56.4 |
HIP 7172 |
9.17 |
| 2026-02-12 12:00 |
01:33:08.19 |
+14:19:07.0 |
HIP 7172 |
9.79 |
| 2026-02-13 00:00 |
01:33:10.72 |
+14:19:17.9 |
HIP 7172 |
10.43 |
| 2026-02-13 12:00 |
01:33:13.30 |
+14:19:29.1 |
HIP 7172 |
11.08 |
| 2026-02-14 00:00 |
01:33:15.93 |
+14:19:40.7 |
HIP 7172 |
11.74 |
| 2026-02-14 12:00 |
01:33:18.61 |
+14:19:52.6 |
HIP 7172 |
12.42 |
| 2026-02-15 00:00 |
01:33:21.34 |
+14:20:04.8 |
HIP 7172 |
13.11 |
| 2026-02-15 12:00 |
01:33:24.13 |
+14:20:17.4 |
HIP 7172 |
13.81 |
| 2026-02-16 00:00 |
01:33:26.97 |
+14:20:30.3 |
HIP 7172 |
14.53 |
| 2026-02-16 12:00 |
01:33:29.86 |
+14:20:43.6 |
HIP 7172 |
15.26 |
| 2026-02-17 00:00 |
01:33:32.80 |
+14:20:57.2 |
HIP 7172 |
16.01 |
| 2026-02-17 12:00 |
01:33:35.79 |
+14:21:11.1 |
HIP 7172 |
16.77 |
| 2026-02-18 00:00 |
01:33:38.82 |
+14:21:25.3 |
HIP 7172 |
17.54 |
| 2026-02-18 12:00 |
01:33:41.91 |
+14:21:39.8 |
HIP 7369 |
17.73 |
| 2026-02-19 00:00 |
01:33:45.05 |
+14:21:54.7 |
HIP 7369 |
16.96 |
| 2026-02-19 12:00 |
01:33:48.24 |
+14:22:09.9 |
HIP 7369 |
16.17 |
| 2026-02-20 00:00 |
01:33:51.47 |
+14:22:25.4 |
HIP 7369 |
15.38 |
| 2026-02-20 12:00 |
01:33:54.75 |
+14:22:41.2 |
HIP 7369 |
14.57 |
| 2026-02-21 00:00 |
01:33:58.08 |
+14:22:57.4 |
HIP 7369 |
13.76 |
| 2026-02-21 12:00 |
01:34:01.46 |
+14:23:13.8 |
HIP 7369 |
12.94 |
| 2026-02-22 00:00 |
01:34:04.88 |
+14:23:30.6 |
HIP 7369 |
12.12 |
| 2026-02-22 12:00 |
01:34:08.35 |
+14:23:47.7 |
HIP 7369 |
11.29 |
| 2026-02-23 00:00 |
01:34:11.87 |
+14:24:05.1 |
HIP 7369 |
10.47 |
| 2026-02-23 12:00 |
01:34:15.43 |
+14:24:22.7 |
HIP 7369 |
9.64 |
| 2026-02-24 00:00 |
01:34:19.03 |
+14:24:40.7 |
HIP 7369 |
8.82 |