C/2012 F1 (Gibbs)
| 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) |
| 2026-02-03 00:00 |
01:53:58.06 |
+33:30:15.1 |
HIP 8927 |
18.84 |
| 2026-02-03 12:00 |
01:53:58.79 |
+33:29:55.3 |
HIP 8927 |
19.00 |
| 2026-02-04 00:00 |
01:53:59.56 |
+33:29:35.8 |
HIP 8927 |
19.16 |
| 2026-02-04 12:00 |
01:54:00.37 |
+33:29:16.5 |
HIP 8927 |
19.31 |
| 2026-02-05 00:00 |
01:54:01.21 |
+33:28:57.4 |
HIP 8927 |
19.46 |
| 2026-02-05 12:00 |
01:54:02.10 |
+33:28:38.6 |
HIP 8927 |
19.61 |
| 2026-02-06 00:00 |
01:54:03.02 |
+33:28:20.0 |
HIP 8927 |
19.76 |
| 2026-02-06 12:00 |
01:54:03.98 |
+33:28:01.6 |
HIP 8927 |
19.91 |
| 2026-02-07 00:00 |
01:54:04.98 |
+33:27:43.5 |
HIP 8927 |
20.05 |
| 2026-02-07 12:00 |
01:54:06.02 |
+33:27:25.7 |
HIP 8927 |
20.19 |
| 2026-02-08 00:00 |
01:54:07.09 |
+33:27:08.0 |
HIP 8927 |
20.33 |
| 2026-02-08 12:00 |
01:54:08.21 |
+33:26:50.6 |
HIP 8927 |
20.47 |
| 2026-02-09 00:00 |
01:54:09.36 |
+33:26:33.5 |
HIP 8927 |
20.61 |
| 2026-02-09 12:00 |
01:54:10.55 |
+33:26:16.6 |
HIP 8927 |
20.74 |
| 2026-02-10 00:00 |
01:54:11.77 |
+33:26:00.0 |
HIP 8927 |
20.87 |
| 2026-02-10 12:00 |
01:54:13.03 |
+33:25:43.5 |
HIP 8927 |
21.01 |
| 2026-02-11 00:00 |
01:54:14.33 |
+33:25:27.3 |
HIP 8927 |
21.14 |
| 2026-02-11 12:00 |
01:54:15.67 |
+33:25:11.4 |
HIP 8927 |
21.27 |
| 2026-02-12 00:00 |
01:54:17.04 |
+33:24:55.7 |
HIP 8927 |
21.40 |
| 2026-02-12 12:00 |
01:54:18.45 |
+33:24:40.3 |
HIP 8927 |
21.53 |
| 2026-02-13 00:00 |
01:54:19.90 |
+33:24:25.1 |
HIP 8927 |
21.66 |
| 2026-02-13 12:00 |
01:54:21.38 |
+33:24:10.2 |
HIP 8927 |
21.79 |
| 2026-02-14 00:00 |
01:54:22.90 |
+33:23:55.5 |
HIP 8927 |
21.92 |
| 2026-02-14 12:00 |
01:54:24.46 |
+33:23:41.1 |
HIP 8927 |
22.05 |
| 2026-02-15 00:00 |
01:54:26.05 |
+33:23:26.9 |
HIP 8927 |
22.18 |
| 2026-02-15 12:00 |
01:54:27.67 |
+33:23:13.0 |
HIP 8927 |
22.31 |
| 2026-02-16 00:00 |
01:54:29.33 |
+33:22:59.3 |
HIP 8927 |
22.44 |
| 2026-02-16 12:00 |
01:54:31.03 |
+33:22:45.9 |
HIP 8927 |
22.58 |
| 2026-02-17 00:00 |
01:54:32.76 |
+33:22:32.7 |
HIP 8927 |
22.71 |
| 2026-02-17 12:00 |
01:54:34.53 |
+33:22:19.8 |
HIP 8927 |
22.85 |
| 2026-02-18 00:00 |
01:54:36.33 |
+33:22:07.1 |
HIP 8927 |
22.99 |
| 2026-02-18 12:00 |
01:54:38.16 |
+33:21:54.7 |
HIP 8927 |
23.12 |
| 2026-02-19 00:00 |
01:54:40.03 |
+33:21:42.6 |
HIP 8927 |
23.27 |
| 2026-02-19 12:00 |
01:54:41.94 |
+33:21:30.7 |
HIP 8927 |
23.41 |
| 2026-02-20 00:00 |
01:54:43.87 |
+33:21:19.1 |
HIP 8927 |
23.56 |
| 2026-02-20 12:00 |
01:54:45.84 |
+33:21:07.7 |
HIP 8927 |
23.70 |
| 2026-02-21 00:00 |
01:54:47.84 |
+33:20:56.6 |
HIP 8927 |
23.86 |
| 2026-02-21 12:00 |
01:54:49.88 |
+33:20:45.7 |
HIP 8927 |
24.01 |
| 2026-02-22 00:00 |
01:54:51.95 |
+33:20:35.1 |
HIP 8927 |
24.17 |
| 2026-02-22 12:00 |
01:54:54.05 |
+33:20:24.8 |
HIP 8927 |
24.33 |
| 2026-02-23 00:00 |
01:54:56.18 |
+33:20:14.7 |
HIP 8927 |
24.49 |
| 2026-02-23 12:00 |
01:54:58.35 |
+33:20:04.9 |
HIP 8927 |
24.66 |
| 2026-02-24 00:00 |
01:55:00.54 |
+33:19:55.3 |
HIP 8927 |
24.84 |