| Parameter |
Value |
| Designation |
C/2007 K4 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-03T17:12:48.067200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:08Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-06-13.0000000 |
| e |
1.00297142 |
| q (au) |
3.527848 |
| a (au) |
-1187.258376 |
| i (deg) |
98.626550 |
| Ω (om, deg) |
68.516312 |
| ω (w, deg) |
162.413892 |
| M (ma, deg) |
0.000971 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.288 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.288 |
| n |
6.000 |
| gf |
0.992 |
| gb |
-1.000 |
| k |
0.999 |
| 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 |
05:28:46.89 |
-28:42:00.3 |
HIP 25559 |
14.65 |
| 2026-05-12 12:00 |
05:28:49.82 |
-28:41:36.1 |
HIP 25559 |
15.40 |
| 2026-05-13 00:00 |
05:28:52.77 |
-28:41:12.2 |
HIP 25559 |
16.16 |
| 2026-05-13 12:00 |
05:28:55.74 |
-28:40:48.5 |
HIP 25559 |
16.91 |
| 2026-05-14 00:00 |
05:28:58.72 |
-28:40:25.1 |
HIP 25559 |
17.67 |
| 2026-05-14 12:00 |
05:29:01.71 |
-28:40:02.0 |
HIP 25559 |
18.43 |
| 2026-05-15 00:00 |
05:29:04.72 |
-28:39:39.2 |
HIP 25559 |
19.19 |
| 2026-05-15 12:00 |
05:29:07.74 |
-28:39:16.6 |
HIP 25559 |
19.95 |
| 2026-05-16 00:00 |
05:29:10.78 |
-28:38:54.3 |
HIP 25798 |
19.66 |
| 2026-05-16 12:00 |
05:29:13.83 |
-28:38:32.3 |
HIP 25798 |
19.20 |
| 2026-05-17 00:00 |
05:29:16.89 |
-28:38:10.5 |
HIP 25798 |
18.77 |
| 2026-05-17 12:00 |
05:29:19.96 |
-28:37:49.0 |
HIP 25798 |
18.34 |
| 2026-05-18 00:00 |
05:29:23.05 |
-28:37:27.8 |
HIP 25798 |
17.94 |
| 2026-05-18 12:00 |
05:29:26.15 |
-28:37:06.9 |
HIP 25798 |
17.56 |
| 2026-05-19 00:00 |
05:29:29.26 |
-28:36:46.2 |
HIP 25798 |
17.19 |
| 2026-05-19 12:00 |
05:29:32.39 |
-28:36:25.9 |
HIP 25798 |
16.85 |
| 2026-05-20 00:00 |
05:29:35.52 |
-28:36:05.8 |
HIP 25798 |
16.53 |
| 2026-05-20 12:00 |
05:29:38.67 |
-28:35:46.0 |
HIP 25798 |
16.23 |
| 2026-05-21 00:00 |
05:29:41.83 |
-28:35:26.4 |
HIP 25798 |
15.97 |
| 2026-05-21 12:00 |
05:29:45.00 |
-28:35:07.2 |
HIP 25798 |
15.73 |
| 2026-05-22 00:00 |
05:29:48.17 |
-28:34:48.2 |
HIP 25798 |
15.51 |
| 2026-05-22 12:00 |
05:29:51.36 |
-28:34:29.6 |
HIP 25798 |
15.33 |
| 2026-05-23 00:00 |
05:29:54.57 |
-28:34:11.2 |
HIP 25843 |
14.83 |
| 2026-05-23 12:00 |
05:29:57.78 |
-28:33:53.1 |
HIP 25843 |
14.09 |
| 2026-05-24 00:00 |
05:30:01.00 |
-28:33:35.2 |
HIP 25843 |
13.35 |
| 2026-05-24 12:00 |
05:30:04.22 |
-28:33:17.7 |
HIP 25843 |
12.60 |
| 2026-05-25 00:00 |
05:30:07.46 |
-28:33:00.4 |
HIP 25843 |
11.87 |
| 2026-05-25 12:00 |
05:30:10.71 |
-28:32:43.5 |
HIP 25843 |
11.13 |
| 2026-05-26 00:00 |
05:30:13.97 |
-28:32:26.8 |
HIP 25843 |
10.39 |
| 2026-05-26 12:00 |
05:30:17.23 |
-28:32:10.4 |
HIP 25843 |
9.66 |
| 2026-05-27 00:00 |
05:30:20.51 |
-28:31:54.3 |
HIP 25843 |
8.94 |
| 2026-05-27 12:00 |
05:30:23.79 |
-28:31:38.5 |
HIP 25843 |
8.21 |
| 2026-05-28 00:00 |
05:30:27.08 |
-28:31:23.0 |
HIP 25843 |
7.50 |
| 2026-05-28 12:00 |
05:30:30.38 |
-28:31:07.8 |
HIP 25843 |
6.80 |
| 2026-05-29 00:00 |
05:30:33.68 |
-28:30:52.8 |
HIP 25843 |
6.10 |
| 2026-05-29 12:00 |
05:30:36.99 |
-28:30:38.2 |
HIP 25843 |
5.43 |
| 2026-05-30 00:00 |
05:30:40.31 |
-28:30:23.8 |
HIP 25843 |
4.78 |
| 2026-05-30 12:00 |
05:30:43.64 |
-28:30:09.8 |
HIP 25843 |
4.17 |
| 2026-05-31 00:00 |
05:30:46.97 |
-28:29:56.0 |
HIP 25843 |
3.61 |
| 2026-05-31 12:00 |
05:30:50.31 |
-28:29:42.5 |
HIP 25843 |
3.14 |
| 2026-06-01 00:00 |
05:30:53.66 |
-28:29:29.3 |
HIP 25843 |
2.80 |
| 2026-06-01 12:00 |
05:30:57.01 |
-28:29:16.4 |
HIP 25843 |
2.64 |
| 2026-06-02 00:00 |
05:31:00.37 |
-28:29:03.9 |
HIP 25843 |
2.69 |