| Parameter |
Value |
| Designation |
C/2014 R4 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-10-21T12:21:03.185280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:59Z |
| Obs used |
129 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
28.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-10-17.0000000 |
| e |
0.99942874 |
| q (au) |
1.817966 |
| a (au) |
3182.405214 |
| i (deg) |
42.411578 |
| Ω (om, deg) |
279.529966 |
| ω (w, deg) |
180.840887 |
| M (ma, deg) |
359.999975 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.263 + 4.690\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.263 |
| n |
4.690 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
16:59:14.53 |
-42:38:08.0 |
HIP 83065 |
24.05 |
| 2026-05-12 12:00 |
16:59:09.39 |
-42:38:09.2 |
HIP 83065 |
23.68 |
| 2026-05-13 00:00 |
16:59:04.23 |
-42:38:10.1 |
HIP 83065 |
23.35 |
| 2026-05-13 12:00 |
16:58:59.05 |
-42:38:10.8 |
HIP 83065 |
23.05 |
| 2026-05-14 00:00 |
16:58:53.85 |
-42:38:11.3 |
HIP 83065 |
22.79 |
| 2026-05-14 12:00 |
16:58:48.62 |
-42:38:11.6 |
HIP 83065 |
22.57 |
| 2026-05-15 00:00 |
16:58:43.38 |
-42:38:11.6 |
HIP 82934 |
22.24 |
| 2026-05-15 12:00 |
16:58:38.12 |
-42:38:11.4 |
HIP 82934 |
21.36 |
| 2026-05-16 00:00 |
16:58:32.83 |
-42:38:11.0 |
HIP 82934 |
20.50 |
| 2026-05-16 12:00 |
16:58:27.53 |
-42:38:10.4 |
HIP 82934 |
19.64 |
| 2026-05-17 00:00 |
16:58:22.21 |
-42:38:09.6 |
HIP 82934 |
18.79 |
| 2026-05-17 12:00 |
16:58:16.87 |
-42:38:08.6 |
HIP 82934 |
17.96 |
| 2026-05-18 00:00 |
16:58:11.51 |
-42:38:07.3 |
HIP 82934 |
17.14 |
| 2026-05-18 12:00 |
16:58:06.14 |
-42:38:05.8 |
HIP 82934 |
16.33 |
| 2026-05-19 00:00 |
16:58:00.75 |
-42:38:04.1 |
HIP 82934 |
15.55 |
| 2026-05-19 12:00 |
16:57:55.34 |
-42:38:02.2 |
HIP 82934 |
14.79 |
| 2026-05-20 00:00 |
16:57:49.92 |
-42:38:00.0 |
HIP 82934 |
14.07 |
| 2026-05-20 12:00 |
16:57:44.48 |
-42:37:57.7 |
HIP 82934 |
13.37 |
| 2026-05-21 00:00 |
16:57:39.03 |
-42:37:55.1 |
HIP 82934 |
12.73 |
| 2026-05-21 12:00 |
16:57:33.56 |
-42:37:52.3 |
HIP 82934 |
12.12 |
| 2026-05-22 00:00 |
16:57:28.08 |
-42:37:49.2 |
HIP 82934 |
11.58 |
| 2026-05-22 12:00 |
16:57:22.59 |
-42:37:46.0 |
HIP 82934 |
11.11 |
| 2026-05-23 00:00 |
16:57:17.08 |
-42:37:42.5 |
HIP 82934 |
10.71 |
| 2026-05-23 12:00 |
16:57:11.57 |
-42:37:38.8 |
HIP 82934 |
10.40 |
| 2026-05-24 00:00 |
16:57:06.04 |
-42:37:34.9 |
HIP 82934 |
10.18 |
| 2026-05-24 12:00 |
16:57:00.50 |
-42:37:30.8 |
HIP 82934 |
10.07 |
| 2026-05-25 00:00 |
16:56:54.95 |
-42:37:26.4 |
HIP 82934 |
10.06 |
| 2026-05-25 12:00 |
16:56:49.39 |
-42:37:21.9 |
HIP 82934 |
10.16 |
| 2026-05-26 00:00 |
16:56:43.82 |
-42:37:17.1 |
HIP 82934 |
10.36 |
| 2026-05-26 12:00 |
16:56:38.24 |
-42:37:12.1 |
HIP 82934 |
10.67 |
| 2026-05-27 00:00 |
16:56:32.65 |
-42:37:06.9 |
HIP 82934 |
11.06 |
| 2026-05-27 12:00 |
16:56:27.05 |
-42:37:01.4 |
HIP 82934 |
11.54 |
| 2026-05-28 00:00 |
16:56:21.45 |
-42:36:55.8 |
HIP 82934 |
12.09 |
| 2026-05-28 12:00 |
16:56:15.84 |
-42:36:49.9 |
HIP 82934 |
12.71 |
| 2026-05-29 00:00 |
16:56:10.22 |
-42:36:43.8 |
HIP 82934 |
13.38 |
| 2026-05-29 12:00 |
16:56:04.59 |
-42:36:37.5 |
HIP 82934 |
14.10 |
| 2026-05-30 00:00 |
16:55:58.96 |
-42:36:31.0 |
HIP 82934 |
14.86 |
| 2026-05-30 12:00 |
16:55:53.33 |
-42:36:24.2 |
HIP 82934 |
15.65 |
| 2026-05-31 00:00 |
16:55:47.69 |
-42:36:17.2 |
HIP 82934 |
16.48 |
| 2026-05-31 12:00 |
16:55:42.04 |
-42:36:10.1 |
HIP 82716 |
15.70 |
| 2026-06-01 00:00 |
16:55:36.39 |
-42:36:02.7 |
HIP 82716 |
14.74 |
| 2026-06-01 12:00 |
16:55:30.74 |
-42:35:55.1 |
HIP 82716 |
13.77 |
| 2026-06-02 00:00 |
16:55:25.08 |
-42:35:47.2 |
HIP 82716 |
12.82 |