| Parameter |
Value |
| Designation |
C/2012 F1 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2012-02-19T02:09:39.654720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:05Z |
| Obs used |
83 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-03-22.0000000 |
| e |
0.96570670 |
| q (au) |
2.550934 |
| a (au) |
74.385762 |
| i (deg) |
159.396833 |
| Ω (om, deg) |
129.965498 |
| ω (w, deg) |
300.425399 |
| M (ma, deg) |
0.049023 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.982 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.982 |
| n |
2.000 |
| gf |
0.801 |
| gb |
-0.500 |
| k |
0.899 |
| δ90 |
1.000 |
| 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 |
02:04:14.58 |
+33:41:29.0 |
HIP 9636 |
5.01 |
| 2026-05-12 12:00 |
02:04:18.45 |
+33:41:51.5 |
HIP 9636 |
5.79 |
| 2026-05-13 00:00 |
02:04:22.30 |
+33:42:14.1 |
HIP 9636 |
6.60 |
| 2026-05-13 12:00 |
02:04:26.15 |
+33:42:36.8 |
HIP 9636 |
7.43 |
| 2026-05-14 00:00 |
02:04:29.98 |
+33:42:59.6 |
HIP 9636 |
8.27 |
| 2026-05-14 12:00 |
02:04:33.80 |
+33:43:22.5 |
HIP 9636 |
9.11 |
| 2026-05-15 00:00 |
02:04:37.61 |
+33:43:45.6 |
HIP 9636 |
9.96 |
| 2026-05-15 12:00 |
02:04:41.41 |
+33:44:08.7 |
HIP 9636 |
10.81 |
| 2026-05-16 00:00 |
02:04:45.19 |
+33:44:32.0 |
HIP 9636 |
11.66 |
| 2026-05-16 12:00 |
02:04:48.96 |
+33:44:55.3 |
HIP 9636 |
12.51 |
| 2026-05-17 00:00 |
02:04:52.72 |
+33:45:18.8 |
HIP 9636 |
13.36 |
| 2026-05-17 12:00 |
02:04:56.46 |
+33:45:42.3 |
HIP 9636 |
14.22 |
| 2026-05-18 00:00 |
02:05:00.19 |
+33:46:06.0 |
HIP 9636 |
15.07 |
| 2026-05-18 12:00 |
02:05:03.91 |
+33:46:29.7 |
HIP 9636 |
15.92 |
| 2026-05-19 00:00 |
02:05:07.61 |
+33:46:53.5 |
HIP 9636 |
16.77 |
| 2026-05-19 12:00 |
02:05:11.29 |
+33:47:17.5 |
HIP 9636 |
17.62 |
| 2026-05-20 00:00 |
02:05:14.96 |
+33:47:41.5 |
HIP 9636 |
18.47 |
| 2026-05-20 12:00 |
02:05:18.61 |
+33:48:05.6 |
HIP 9636 |
19.32 |
| 2026-05-21 00:00 |
02:05:22.25 |
+33:48:29.8 |
HIP 9636 |
20.17 |
| 2026-05-21 12:00 |
02:05:25.88 |
+33:48:54.1 |
HIP 9636 |
21.01 |
| 2026-05-22 00:00 |
02:05:29.48 |
+33:49:18.4 |
HIP 9636 |
21.85 |
| 2026-05-22 12:00 |
02:05:33.07 |
+33:49:42.9 |
HIP 9636 |
22.69 |
| 2026-05-23 00:00 |
02:05:36.65 |
+33:50:07.4 |
HIP 9636 |
23.53 |
| 2026-05-23 12:00 |
02:05:40.20 |
+33:50:32.0 |
HIP 9636 |
24.36 |
| 2026-05-24 00:00 |
02:05:43.74 |
+33:50:56.7 |
HIP 9636 |
25.20 |
| 2026-05-24 12:00 |
02:05:47.26 |
+33:51:21.4 |
HIP 9636 |
26.03 |
| 2026-05-25 00:00 |
02:05:50.77 |
+33:51:46.2 |
HIP 9636 |
26.86 |
| 2026-05-25 12:00 |
02:05:54.25 |
+33:52:11.1 |
HIP 9636 |
27.68 |
| 2026-05-26 00:00 |
02:05:57.72 |
+33:52:36.1 |
HIP 9636 |
28.50 |
| 2026-05-26 12:00 |
02:06:01.17 |
+33:53:01.1 |
HIP 9636 |
29.32 |
| 2026-05-27 00:00 |
02:06:04.60 |
+33:53:26.2 |
HIP 9636 |
30.14 |
| 2026-05-27 12:00 |
02:06:08.01 |
+33:53:51.4 |
HIP 9636 |
30.96 |
| 2026-05-28 00:00 |
02:06:11.41 |
+33:54:16.6 |
HIP 9636 |
31.77 |
| 2026-05-28 12:00 |
02:06:14.78 |
+33:54:41.9 |
HIP 9636 |
32.58 |
| 2026-05-29 00:00 |
02:06:18.14 |
+33:55:07.3 |
HIP 9636 |
33.38 |
| 2026-05-29 12:00 |
02:06:21.47 |
+33:55:32.7 |
HIP 9636 |
34.19 |
| 2026-05-30 00:00 |
02:06:24.78 |
+33:55:58.2 |
HIP 9636 |
34.99 |
| 2026-05-30 12:00 |
02:06:28.08 |
+33:56:23.7 |
HIP 9636 |
35.78 |
| 2026-05-31 00:00 |
02:06:31.35 |
+33:56:49.3 |
HIP 9636 |
36.58 |
| 2026-05-31 12:00 |
02:06:34.61 |
+33:57:14.9 |
HIP 9636 |
37.37 |
| 2026-06-01 00:00 |
02:06:37.84 |
+33:57:40.6 |
HIP 9636 |
38.15 |
| 2026-06-01 12:00 |
02:06:41.05 |
+33:58:06.3 |
HIP 9636 |
38.94 |
| 2026-06-02 00:00 |
02:06:44.24 |
+33:58:32.1 |
HIP 9636 |
39.72 |