| Parameter |
Value |
| Designation |
P/2016 P5 (COIAS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-06-01T10:27:54.313920Z |
| Orbit solution date (soln_date, UTC) |
2026-03-11T21:13:02Z |
| Obs used |
239 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
16.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2016-08-01T11:41:07.296000Z |
| Discovery magnitude (MPC) |
24.10 z |
| Discovery observatory (MPC) |
T09 · Subaru Telescope, Maunakea |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-02-06.0000000 |
| e |
0.05781852 |
| q (au) |
4.432558 |
| a (au) |
4.704569 |
| i (deg) |
7.037249 |
| Ω (om, deg) |
185.406308 |
| ω (w, deg) |
34.972005 |
| M (ma, deg) |
313.595523 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.138 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.138 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.703 |
| 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) |
| 2026-06-01 00:00 |
22:57:48.09 |
-02:27:32.0 |
HIP 113421 |
7.85 |
| 2026-06-01 12:00 |
22:57:59.83 |
-02:26:13.5 |
HIP 113421 |
4.66 |
| 2026-06-02 00:00 |
22:58:11.42 |
-02:24:56.0 |
HIP 113421 |
1.59 |
| 2026-06-02 12:00 |
22:58:22.85 |
-02:23:39.3 |
HIP 113421 |
1.83 |
| 2026-06-03 00:00 |
22:58:34.12 |
-02:22:23.6 |
HIP 113421 |
4.83 |
| 2026-06-03 12:00 |
22:58:45.24 |
-02:21:08.8 |
HIP 113421 |
7.85 |
| 2026-06-04 00:00 |
22:58:56.21 |
-02:19:55.0 |
HIP 113421 |
10.85 |
| 2026-06-04 12:00 |
22:59:07.01 |
-02:18:42.1 |
HIP 113547 |
13.09 |
| 2026-06-05 00:00 |
22:59:17.66 |
-02:17:30.1 |
HIP 113547 |
11.92 |
| 2026-06-05 12:00 |
22:59:28.15 |
-02:16:19.1 |
HIP 113547 |
11.39 |
| 2026-06-06 00:00 |
22:59:38.49 |
-02:15:09.1 |
HIP 113547 |
11.57 |
| 2026-06-06 12:00 |
22:59:48.66 |
-02:14:00.0 |
HIP 113547 |
12.39 |
| 2026-06-07 00:00 |
22:59:58.67 |
-02:12:52.0 |
HIP 113547 |
13.72 |
| 2026-06-07 12:00 |
23:00:08.52 |
-02:11:44.9 |
HIP 113547 |
15.40 |
| 2026-06-08 00:00 |
23:00:18.20 |
-02:10:38.8 |
HIP 113547 |
17.31 |
| 2026-06-08 12:00 |
23:00:27.73 |
-02:09:33.7 |
HIP 113547 |
19.36 |
| 2026-06-09 00:00 |
23:00:37.09 |
-02:08:29.7 |
HIP 113547 |
21.49 |
| 2026-06-09 12:00 |
23:00:46.28 |
-02:07:26.6 |
HIP 113547 |
23.68 |
| 2026-06-10 00:00 |
23:00:55.31 |
-02:06:24.6 |
HIP 113547 |
25.89 |
| 2026-06-10 12:00 |
23:01:04.17 |
-02:05:23.6 |
HIP 113547 |
28.10 |
| 2026-06-11 00:00 |
23:01:12.87 |
-02:04:23.6 |
HIP 113547 |
30.30 |
| 2026-06-11 12:00 |
23:01:21.40 |
-02:03:24.7 |
HIP 113547 |
32.49 |
| 2026-06-12 00:00 |
23:01:29.76 |
-02:02:26.9 |
HIP 113547 |
34.66 |
| 2026-06-12 12:00 |
23:01:37.95 |
-02:01:30.1 |
HIP 113547 |
36.80 |
| 2026-06-13 00:00 |
23:01:45.97 |
-02:00:34.3 |
HIP 113931 |
38.67 |
| 2026-06-13 12:00 |
23:01:53.82 |
-01:59:39.7 |
HIP 113931 |
36.58 |
| 2026-06-14 00:00 |
23:02:01.50 |
-01:58:46.1 |
HIP 113931 |
34.56 |
| 2026-06-14 12:00 |
23:02:09.00 |
-01:57:53.6 |
HIP 113931 |
32.58 |
| 2026-06-15 00:00 |
23:02:16.34 |
-01:57:02.2 |
HIP 113931 |
30.67 |
| 2026-06-15 12:00 |
23:02:23.50 |
-01:56:11.9 |
HIP 113931 |
28.81 |
| 2026-06-16 00:00 |
23:02:30.48 |
-01:55:22.8 |
HIP 113931 |
27.02 |
| 2026-06-16 12:00 |
23:02:37.29 |
-01:54:34.7 |
HIP 113931 |
25.29 |
| 2026-06-17 00:00 |
23:02:43.93 |
-01:53:47.7 |
HIP 113931 |
23.62 |
| 2026-06-17 12:00 |
23:02:50.39 |
-01:53:01.9 |
HIP 113931 |
22.03 |
| 2026-06-18 00:00 |
23:02:56.68 |
-01:52:17.2 |
HIP 113931 |
20.51 |
| 2026-06-18 12:00 |
23:03:02.79 |
-01:51:33.6 |
HIP 113931 |
19.07 |
| 2026-06-19 00:00 |
23:03:08.72 |
-01:50:51.2 |
HIP 113931 |
17.71 |
| 2026-06-19 12:00 |
23:03:14.48 |
-01:50:09.9 |
HIP 113931 |
16.44 |
| 2026-06-20 00:00 |
23:03:20.06 |
-01:49:29.7 |
HIP 113931 |
15.27 |
| 2026-06-20 12:00 |
23:03:25.46 |
-01:48:50.7 |
HIP 113931 |
14.21 |
| 2026-06-21 00:00 |
23:03:30.68 |
-01:48:12.9 |
HIP 113931 |
13.26 |
| 2026-06-21 12:00 |
23:03:35.73 |
-01:47:36.2 |
HIP 113931 |
12.44 |
| 2026-06-22 00:00 |
23:03:40.59 |
-01:47:00.7 |
HIP 113931 |
11.76 |