| Parameter |
Value |
| Designation |
P/2016 P1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-09-08T07:16:06.602880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:26Z |
| Obs used |
40 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
10.000 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-08-06.0000000 |
| e |
0.29419825 |
| q (au) |
2.279185 |
| a (au) |
3.229214 |
| i (deg) |
25.706555 |
| Ω (om, deg) |
319.536773 |
| ω (w, deg) |
267.536803 |
| M (ma, deg) |
56.507743 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.843 |
| k |
0.985 |
| δ90 |
9.996 |
| 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) |
| 2026-03-26 00:00 |
07:29:02.11 |
+28:03:10.4 |
HIP 36393 |
5.64 |
| 2026-03-26 12:00 |
07:29:07.57 |
+27:59:31.5 |
HIP 36393 |
8.10 |
| 2026-03-27 00:00 |
07:29:13.39 |
+27:55:52.5 |
HIP 36429 |
7.87 |
| 2026-03-27 12:00 |
07:29:19.57 |
+27:52:13.5 |
HIP 36429 |
7.01 |
| 2026-03-28 00:00 |
07:29:26.10 |
+27:48:34.5 |
HIP 36429 |
8.13 |
| 2026-03-28 12:00 |
07:29:32.99 |
+27:44:55.4 |
HIP 36429 |
10.64 |
| 2026-03-29 00:00 |
07:29:40.23 |
+27:41:16.3 |
HIP 36429 |
13.83 |
| 2026-03-29 12:00 |
07:29:47.81 |
+27:37:37.1 |
HIP 36325 |
15.69 |
| 2026-03-30 00:00 |
07:29:55.74 |
+27:33:57.9 |
HIP 36325 |
16.83 |
| 2026-03-30 12:00 |
07:30:04.01 |
+27:30:18.7 |
HIP 36325 |
18.87 |
| 2026-03-31 00:00 |
07:30:12.62 |
+27:26:39.4 |
HIP 36581 |
19.36 |
| 2026-03-31 12:00 |
07:30:21.57 |
+27:23:00.2 |
HIP 36581 |
20.16 |
| 2026-04-01 00:00 |
07:30:30.86 |
+27:19:20.9 |
HIP 36581 |
21.69 |
| 2026-04-01 12:00 |
07:30:40.48 |
+27:15:41.6 |
HIP 36647 |
22.12 |
| 2026-04-02 00:00 |
07:30:50.43 |
+27:12:02.2 |
HIP 36647 |
18.89 |
| 2026-04-02 12:00 |
07:31:00.70 |
+27:08:22.9 |
HIP 36647 |
16.09 |
| 2026-04-03 00:00 |
07:31:11.31 |
+27:04:43.5 |
HIP 36647 |
13.99 |
| 2026-04-03 12:00 |
07:31:22.24 |
+27:01:04.1 |
HIP 36647 |
12.99 |
| 2026-04-04 00:00 |
07:31:33.49 |
+26:57:24.7 |
HIP 36647 |
13.39 |
| 2026-04-04 12:00 |
07:31:45.06 |
+26:53:45.3 |
HIP 36647 |
15.10 |
| 2026-04-05 00:00 |
07:31:56.95 |
+26:50:05.8 |
HIP 36647 |
17.78 |
| 2026-04-05 12:00 |
07:32:09.15 |
+26:46:26.4 |
HIP 36601 |
19.91 |
| 2026-04-06 00:00 |
07:32:21.67 |
+26:42:46.9 |
HIP 36601 |
17.85 |
| 2026-04-06 12:00 |
07:32:34.49 |
+26:39:07.4 |
HIP 36601 |
16.88 |
| 2026-04-07 00:00 |
07:32:47.63 |
+26:35:27.9 |
HIP 36601 |
17.23 |
| 2026-04-07 12:00 |
07:33:01.07 |
+26:31:48.3 |
HIP 36601 |
18.85 |
| 2026-04-08 00:00 |
07:33:14.82 |
+26:28:08.8 |
HIP 36725 |
21.32 |
| 2026-04-08 12:00 |
07:33:28.87 |
+26:24:29.2 |
HIP 36725 |
18.03 |
| 2026-04-09 00:00 |
07:33:43.21 |
+26:20:49.5 |
HIP 36725 |
15.58 |
| 2026-04-09 12:00 |
07:33:57.86 |
+26:17:09.9 |
HIP 36725 |
14.47 |
| 2026-04-10 00:00 |
07:34:12.80 |
+26:13:30.2 |
HIP 36725 |
15.05 |
| 2026-04-10 12:00 |
07:34:28.04 |
+26:09:50.5 |
HIP 36725 |
17.17 |
| 2026-04-11 00:00 |
07:34:43.57 |
+26:06:10.7 |
HIP 36725 |
20.41 |
| 2026-04-11 12:00 |
07:34:59.38 |
+26:02:30.9 |
HIP 36725 |
24.34 |
| 2026-04-12 00:00 |
07:35:15.49 |
+25:58:51.0 |
HIP 36907 |
24.93 |
| 2026-04-12 12:00 |
07:35:31.88 |
+25:55:11.1 |
HIP 36907 |
21.53 |
| 2026-04-13 00:00 |
07:35:48.55 |
+25:51:31.1 |
HIP 37064 |
17.63 |
| 2026-04-13 12:00 |
07:36:05.50 |
+25:47:51.1 |
HIP 37064 |
12.75 |
| 2026-04-14 00:00 |
07:36:22.74 |
+25:44:11.0 |
HIP 37064 |
8.32 |
| 2026-04-14 12:00 |
07:36:40.25 |
+25:40:30.9 |
HIP 37064 |
5.68 |
| 2026-04-15 00:00 |
07:36:58.03 |
+25:36:50.6 |
HIP 37064 |
7.31 |
| 2026-04-15 12:00 |
07:37:16.09 |
+25:33:10.3 |
HIP 37064 |
11.58 |
| 2026-04-16 00:00 |
07:37:34.42 |
+25:29:29.9 |
HIP 37064 |
16.61 |