| 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 |
0.999 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
16:55:19.42 |
-42:35:39.2 |
HIP 82716 |
11.89 |
| 2026-06-03 00:00 |
16:55:13.76 |
-42:35:31.0 |
HIP 82716 |
10.97 |
| 2026-06-03 12:00 |
16:55:08.10 |
-42:35:22.5 |
HIP 82716 |
10.08 |
| 2026-06-04 00:00 |
16:55:02.43 |
-42:35:13.8 |
HIP 82716 |
9.22 |
| 2026-06-04 12:00 |
16:54:56.77 |
-42:35:04.9 |
HIP 82716 |
8.40 |
| 2026-06-05 00:00 |
16:54:51.10 |
-42:34:55.8 |
HIP 82716 |
7.63 |
| 2026-06-05 12:00 |
16:54:45.44 |
-42:34:46.5 |
HIP 82716 |
6.94 |
| 2026-06-06 00:00 |
16:54:39.77 |
-42:34:37.0 |
HIP 82716 |
6.34 |
| 2026-06-06 12:00 |
16:54:34.11 |
-42:34:27.3 |
HIP 82716 |
5.87 |
| 2026-06-07 00:00 |
16:54:28.45 |
-42:34:17.3 |
HIP 82716 |
5.56 |
| 2026-06-07 12:00 |
16:54:22.79 |
-42:34:07.2 |
HIP 82716 |
5.44 |
| 2026-06-08 00:00 |
16:54:17.13 |
-42:33:56.8 |
HIP 82716 |
5.52 |
| 2026-06-08 12:00 |
16:54:11.48 |
-42:33:46.2 |
HIP 82716 |
5.79 |
| 2026-06-09 00:00 |
16:54:05.83 |
-42:33:35.5 |
HIP 82716 |
6.22 |
| 2026-06-09 12:00 |
16:54:00.18 |
-42:33:24.5 |
HIP 82716 |
6.80 |
| 2026-06-10 00:00 |
16:53:54.54 |
-42:33:13.3 |
HIP 82716 |
7.47 |
| 2026-06-10 12:00 |
16:53:48.90 |
-42:33:01.9 |
HIP 82716 |
8.22 |
| 2026-06-11 00:00 |
16:53:43.27 |
-42:32:50.3 |
HIP 82716 |
9.04 |
| 2026-06-11 12:00 |
16:53:37.64 |
-42:32:38.5 |
HIP 82716 |
9.89 |
| 2026-06-12 00:00 |
16:53:32.02 |
-42:32:26.5 |
HIP 82716 |
10.78 |
| 2026-06-12 12:00 |
16:53:26.41 |
-42:32:14.3 |
HIP 82716 |
11.69 |
| 2026-06-13 00:00 |
16:53:20.80 |
-42:32:01.9 |
HIP 82671 |
12.56 |
| 2026-06-13 12:00 |
16:53:15.20 |
-42:31:49.3 |
HIP 82671 |
13.02 |
| 2026-06-14 00:00 |
16:53:09.61 |
-42:31:36.5 |
HIP 82671 |
13.54 |
| 2026-06-14 12:00 |
16:53:04.03 |
-42:31:23.5 |
HIP 82671 |
14.11 |
| 2026-06-15 00:00 |
16:52:58.46 |
-42:31:10.3 |
HIP 82671 |
14.73 |
| 2026-06-15 12:00 |
16:52:52.90 |
-42:30:56.9 |
HIP 82671 |
15.40 |
| 2026-06-16 00:00 |
16:52:47.35 |
-42:30:43.3 |
HIP 82671 |
16.10 |
| 2026-06-16 12:00 |
16:52:41.81 |
-42:30:29.5 |
HIP 82671 |
16.84 |
| 2026-06-17 00:00 |
16:52:36.28 |
-42:30:15.5 |
HIP 82671 |
17.61 |
| 2026-06-17 12:00 |
16:52:30.76 |
-42:30:01.4 |
HIP 82671 |
18.40 |
| 2026-06-18 00:00 |
16:52:25.26 |
-42:29:47.0 |
HIP 82671 |
19.21 |
| 2026-06-18 12:00 |
16:52:19.77 |
-42:29:32.4 |
HIP 82671 |
20.03 |
| 2026-06-19 00:00 |
16:52:14.29 |
-42:29:17.7 |
HIP 82671 |
20.88 |
| 2026-06-19 12:00 |
16:52:08.83 |
-42:29:02.8 |
HIP 82671 |
21.74 |
| 2026-06-20 00:00 |
16:52:03.38 |
-42:28:47.7 |
HIP 82671 |
22.61 |
| 2026-06-20 12:00 |
16:51:57.95 |
-42:28:32.4 |
HIP 82671 |
23.49 |
| 2026-06-21 00:00 |
16:51:52.53 |
-42:28:16.9 |
HIP 82671 |
24.38 |
| 2026-06-21 12:00 |
16:51:47.13 |
-42:28:01.3 |
HIP 82671 |
25.27 |
| 2026-06-22 00:00 |
16:51:41.74 |
-42:27:45.4 |
HIP 82671 |
26.17 |