| Parameter |
Value |
| Designation |
C/2007 T5 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-05-24T05:40:47.795520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:13Z |
| Obs used |
285 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-01-26.0000000 |
| e |
0.91362737 |
| q (au) |
4.049258 |
| a (au) |
46.881263 |
| i (deg) |
45.615235 |
| Ω (om, deg) |
109.843075 |
| ω (w, deg) |
34.416471 |
| M (ma, deg) |
359.633887 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.741 + 2.562\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.741 |
| n |
2.562 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
19:24:45.34 |
-22:16:55.1 |
HIP 95417 |
13.49 |
| 2026-07-29 12:00 |
19:24:41.75 |
-22:17:05.9 |
HIP 95417 |
13.54 |
| 2026-07-30 00:00 |
19:24:38.18 |
-22:17:16.6 |
HIP 95417 |
13.64 |
| 2026-07-30 12:00 |
19:24:34.62 |
-22:17:27.4 |
HIP 95417 |
13.79 |
| 2026-07-31 00:00 |
19:24:31.07 |
-22:17:38.1 |
HIP 95417 |
13.99 |
| 2026-07-31 12:00 |
19:24:27.53 |
-22:17:48.7 |
HIP 95417 |
14.24 |
| 2026-08-01 00:00 |
19:24:24.00 |
-22:17:59.4 |
HIP 95417 |
14.53 |
| 2026-08-01 12:00 |
19:24:20.48 |
-22:18:10.0 |
HIP 95417 |
14.85 |
| 2026-08-02 00:00 |
19:24:16.97 |
-22:18:20.6 |
HIP 95417 |
15.22 |
| 2026-08-02 12:00 |
19:24:13.48 |
-22:18:31.1 |
HIP 95417 |
15.62 |
| 2026-08-03 00:00 |
19:24:10.00 |
-22:18:41.6 |
HIP 95417 |
16.05 |
| 2026-08-03 12:00 |
19:24:06.53 |
-22:18:52.1 |
HIP 95417 |
16.51 |
| 2026-08-04 00:00 |
19:24:03.08 |
-22:19:02.5 |
HIP 95417 |
17.00 |
| 2026-08-04 12:00 |
19:23:59.64 |
-22:19:12.9 |
HIP 95417 |
17.51 |
| 2026-08-05 00:00 |
19:23:56.21 |
-22:19:23.3 |
HIP 95417 |
18.04 |
| 2026-08-05 12:00 |
19:23:52.80 |
-22:19:33.7 |
HIP 95417 |
18.58 |
| 2026-08-06 00:00 |
19:23:49.40 |
-22:19:43.9 |
HIP 95417 |
19.15 |
| 2026-08-06 12:00 |
19:23:46.02 |
-22:19:54.2 |
HIP 95417 |
19.72 |
| 2026-08-07 00:00 |
19:23:42.65 |
-22:20:04.4 |
HIP 95417 |
20.31 |
| 2026-08-07 12:00 |
19:23:39.30 |
-22:20:14.6 |
HIP 95417 |
20.91 |
| 2026-08-08 00:00 |
19:23:35.96 |
-22:20:24.8 |
HIP 95417 |
21.53 |
| 2026-08-08 12:00 |
19:23:32.64 |
-22:20:34.9 |
HIP 95417 |
22.14 |
| 2026-08-09 00:00 |
19:23:29.33 |
-22:20:44.9 |
HIP 95417 |
22.77 |
| 2026-08-09 12:00 |
19:23:26.05 |
-22:20:55.0 |
HIP 95215 |
23.20 |
| 2026-08-10 00:00 |
19:23:22.77 |
-22:21:05.0 |
HIP 95215 |
22.79 |
| 2026-08-10 12:00 |
19:23:19.52 |
-22:21:14.9 |
HIP 95215 |
22.41 |
| 2026-08-11 00:00 |
19:23:16.28 |
-22:21:24.8 |
HIP 95215 |
22.05 |
| 2026-08-11 12:00 |
19:23:13.06 |
-22:21:34.7 |
HIP 95215 |
21.71 |
| 2026-08-12 00:00 |
19:23:09.86 |
-22:21:44.5 |
HIP 95215 |
21.40 |
| 2026-08-12 12:00 |
19:23:06.67 |
-22:21:54.3 |
HIP 95215 |
21.11 |
| 2026-08-13 00:00 |
19:23:03.51 |
-22:22:04.0 |
HIP 95215 |
20.84 |
| 2026-08-13 12:00 |
19:23:00.36 |
-22:22:13.7 |
HIP 95215 |
20.60 |
| 2026-08-14 00:00 |
19:22:57.23 |
-22:22:23.3 |
HIP 95215 |
20.39 |
| 2026-08-14 12:00 |
19:22:54.12 |
-22:22:32.9 |
HIP 95215 |
20.20 |
| 2026-08-15 00:00 |
19:22:51.03 |
-22:22:42.5 |
HIP 95215 |
20.04 |
| 2026-08-15 12:00 |
19:22:47.96 |
-22:22:52.0 |
HIP 95215 |
19.91 |
| 2026-08-16 00:00 |
19:22:44.91 |
-22:23:01.4 |
HIP 95215 |
19.80 |
| 2026-08-16 12:00 |
19:22:41.88 |
-22:23:10.8 |
HIP 95215 |
19.72 |
| 2026-08-17 00:00 |
19:22:38.88 |
-22:23:20.2 |
HIP 95215 |
19.67 |
| 2026-08-17 12:00 |
19:22:35.89 |
-22:23:29.5 |
HIP 95215 |
19.64 |
| 2026-08-18 00:00 |
19:22:32.92 |
-22:23:38.7 |
HIP 95215 |
19.64 |
| 2026-08-18 12:00 |
19:22:29.98 |
-22:23:48.0 |
HIP 95215 |
19.66 |
| 2026-08-19 00:00 |
19:22:27.05 |
-22:23:57.1 |
HIP 95215 |
19.71 |