| Parameter |
Value |
| Designation |
P/2017 W3 (Gibbs) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-02-25T02:11:14.487360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:38Z |
| Obs used |
142 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2018-02-01.0000000 |
| e |
0.50387336 |
| q (au) |
3.837297 |
| a (au) |
7.734510 |
| i (deg) |
18.316724 |
| Ω (om, deg) |
210.753463 |
| ω (w, deg) |
326.464054 |
| M (ma, deg) |
358.896145 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.132 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.132 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-0.500 |
| k |
0.802 |
| δ90 |
2.032 |
| 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 |
22:52:15.25 |
+07:33:11.0 |
HIP 112953 |
7.83 |
| 2026-06-01 12:00 |
22:52:17.70 |
+07:33:57.3 |
HIP 112953 |
6.85 |
| 2026-06-02 00:00 |
22:52:20.07 |
+07:34:43.2 |
HIP 112953 |
5.88 |
| 2026-06-02 12:00 |
22:52:22.37 |
+07:35:28.6 |
HIP 112953 |
4.93 |
| 2026-06-03 00:00 |
22:52:24.58 |
+07:36:13.7 |
HIP 112953 |
4.00 |
| 2026-06-03 12:00 |
22:52:26.72 |
+07:36:58.3 |
HIP 112953 |
3.09 |
| 2026-06-04 00:00 |
22:52:28.78 |
+07:37:42.5 |
HIP 112953 |
2.20 |
| 2026-06-04 12:00 |
22:52:30.76 |
+07:38:26.2 |
HIP 112953 |
1.32 |
| 2026-06-05 00:00 |
22:52:32.66 |
+07:39:09.6 |
HIP 112953 |
0.48 |
| 2026-06-05 12:00 |
22:52:34.49 |
+07:39:52.5 |
HIP 112953 |
0.44 |
| 2026-06-06 00:00 |
22:52:36.23 |
+07:40:34.9 |
HIP 112953 |
1.24 |
| 2026-06-06 12:00 |
22:52:37.90 |
+07:41:16.9 |
HIP 112953 |
2.05 |
| 2026-06-07 00:00 |
22:52:39.48 |
+07:41:58.5 |
HIP 112953 |
2.85 |
| 2026-06-07 12:00 |
22:52:40.99 |
+07:42:39.6 |
HIP 112953 |
3.63 |
| 2026-06-08 00:00 |
22:52:42.42 |
+07:43:20.3 |
HIP 112953 |
4.39 |
| 2026-06-08 12:00 |
22:52:43.76 |
+07:44:00.5 |
HIP 112953 |
5.14 |
| 2026-06-09 00:00 |
22:52:45.03 |
+07:44:40.2 |
HIP 112953 |
5.87 |
| 2026-06-09 12:00 |
22:52:46.22 |
+07:45:19.5 |
HIP 112953 |
6.59 |
| 2026-06-10 00:00 |
22:52:47.33 |
+07:45:58.3 |
HIP 112953 |
7.29 |
| 2026-06-10 12:00 |
22:52:48.35 |
+07:46:36.6 |
HIP 112953 |
7.98 |
| 2026-06-11 00:00 |
22:52:49.30 |
+07:47:14.5 |
HIP 112953 |
8.65 |
| 2026-06-11 12:00 |
22:52:50.17 |
+07:47:51.9 |
HIP 112953 |
9.30 |
| 2026-06-12 00:00 |
22:52:50.95 |
+07:48:28.8 |
HIP 112953 |
9.94 |
| 2026-06-12 12:00 |
22:52:51.66 |
+07:49:05.2 |
HIP 112953 |
10.57 |
| 2026-06-13 00:00 |
22:52:52.28 |
+07:49:41.1 |
HIP 112953 |
11.18 |
| 2026-06-13 12:00 |
22:52:52.83 |
+07:50:16.6 |
HIP 112953 |
11.77 |
| 2026-06-14 00:00 |
22:52:53.29 |
+07:50:51.5 |
HIP 112953 |
12.35 |
| 2026-06-14 12:00 |
22:52:53.67 |
+07:51:25.9 |
HIP 112953 |
12.92 |
| 2026-06-15 00:00 |
22:52:53.97 |
+07:51:59.9 |
HIP 112953 |
13.48 |
| 2026-06-15 12:00 |
22:52:54.19 |
+07:52:33.3 |
HIP 112953 |
14.01 |
| 2026-06-16 00:00 |
22:52:54.33 |
+07:53:06.2 |
HIP 112953 |
14.54 |
| 2026-06-16 12:00 |
22:52:54.39 |
+07:53:38.6 |
HIP 112953 |
15.05 |
| 2026-06-17 00:00 |
22:52:54.36 |
+07:54:10.5 |
HIP 112953 |
15.55 |
| 2026-06-17 12:00 |
22:52:54.26 |
+07:54:41.9 |
HIP 112953 |
16.04 |
| 2026-06-18 00:00 |
22:52:54.07 |
+07:55:12.7 |
HIP 112953 |
16.52 |
| 2026-06-18 12:00 |
22:52:53.81 |
+07:55:43.0 |
HIP 112953 |
16.98 |
| 2026-06-19 00:00 |
22:52:53.46 |
+07:56:12.8 |
HIP 112953 |
17.44 |
| 2026-06-19 12:00 |
22:52:53.03 |
+07:56:42.1 |
HIP 112953 |
17.88 |
| 2026-06-20 00:00 |
22:52:52.52 |
+07:57:10.8 |
HIP 112953 |
18.31 |
| 2026-06-20 12:00 |
22:52:51.93 |
+07:57:39.0 |
HIP 112953 |
18.73 |
| 2026-06-21 00:00 |
22:52:51.27 |
+07:58:06.7 |
HIP 112953 |
19.14 |
| 2026-06-21 12:00 |
22:52:50.52 |
+07:58:33.8 |
HIP 112953 |
19.54 |
| 2026-06-22 00:00 |
22:52:49.69 |
+07:59:00.4 |
HIP 112953 |
19.94 |