| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
08:20:25.53 |
+19:34:46.6 |
HIP 40836 |
9.47 |
| 2026-06-01 12:00 |
08:21:00.61 |
+19:30:36.3 |
HIP 40836 |
14.36 |
| 2026-06-02 00:00 |
08:21:35.80 |
+19:26:25.5 |
HIP 40836 |
22.26 |
| 2026-06-02 12:00 |
08:22:11.10 |
+19:22:14.1 |
HIP 40836 |
30.97 |
| 2026-06-03 00:00 |
08:22:46.50 |
+19:18:02.1 |
HIP 41233 |
30.11 |
| 2026-06-03 12:00 |
08:23:22.02 |
+19:13:49.5 |
HIP 41233 |
21.01 |
| 2026-06-04 00:00 |
08:23:57.63 |
+19:09:36.3 |
HIP 41233 |
12.31 |
| 2026-06-04 12:00 |
08:24:33.35 |
+19:05:22.6 |
HIP 41233 |
6.19 |
| 2026-06-05 00:00 |
08:25:09.18 |
+19:01:08.2 |
HIP 41233 |
10.18 |
| 2026-06-05 12:00 |
08:25:45.10 |
+18:56:53.3 |
HIP 41233 |
18.69 |
| 2026-06-06 00:00 |
08:26:21.13 |
+18:52:37.7 |
HIP 41440 |
24.86 |
| 2026-06-06 12:00 |
08:26:57.26 |
+18:48:21.6 |
HIP 41440 |
26.93 |
| 2026-06-07 00:00 |
08:27:33.48 |
+18:44:04.8 |
HIP 41440 |
31.87 |
| 2026-06-07 12:00 |
08:28:09.81 |
+18:39:47.4 |
HIP 41505 |
35.86 |
| 2026-06-08 00:00 |
08:28:46.23 |
+18:35:29.3 |
HIP 41727 |
32.56 |
| 2026-06-08 12:00 |
08:29:22.75 |
+18:31:10.7 |
HIP 41727 |
30.11 |
| 2026-06-09 00:00 |
08:29:59.36 |
+18:26:51.4 |
HIP 41788 |
24.83 |
| 2026-06-09 12:00 |
08:30:36.07 |
+18:22:31.5 |
HIP 41788 |
15.93 |
| 2026-06-10 00:00 |
08:31:12.88 |
+18:18:10.9 |
HIP 41788 |
8.96 |
| 2026-06-10 12:00 |
08:31:49.77 |
+18:13:49.7 |
HIP 41822 |
8.81 |
| 2026-06-11 00:00 |
08:32:26.76 |
+18:09:27.8 |
HIP 41822 |
12.70 |
| 2026-06-11 12:00 |
08:33:03.85 |
+18:05:05.3 |
HIP 41822 |
20.94 |
| 2026-06-12 00:00 |
08:33:41.02 |
+18:00:42.1 |
HIP 42005 |
21.95 |
| 2026-06-12 12:00 |
08:34:18.28 |
+17:56:18.2 |
HIP 42005 |
19.59 |
| 2026-06-13 00:00 |
08:34:55.63 |
+17:51:53.7 |
HIP 42005 |
21.97 |
| 2026-06-13 12:00 |
08:35:33.07 |
+17:47:28.5 |
HIP 42005 |
27.92 |
| 2026-06-14 00:00 |
08:36:10.59 |
+17:43:02.6 |
HIP 42209 |
25.85 |
| 2026-06-14 12:00 |
08:36:48.20 |
+17:38:36.1 |
HIP 42209 |
22.18 |
| 2026-06-15 00:00 |
08:37:25.90 |
+17:34:08.9 |
HIP 42277 |
19.15 |
| 2026-06-15 12:00 |
08:38:03.67 |
+17:29:40.9 |
HIP 42277 |
18.83 |
| 2026-06-16 00:00 |
08:38:41.54 |
+17:25:12.3 |
HIP 42471 |
12.42 |
| 2026-06-16 12:00 |
08:39:19.48 |
+17:20:43.0 |
HIP 42471 |
8.48 |
| 2026-06-17 00:00 |
08:39:57.50 |
+17:16:13.0 |
HIP 42471 |
13.93 |
| 2026-06-17 12:00 |
08:40:35.60 |
+17:11:42.4 |
HIP 42471 |
22.86 |
| 2026-06-18 00:00 |
08:41:13.78 |
+17:07:11.0 |
HIP 42764 |
23.58 |
| 2026-06-18 12:00 |
08:41:52.04 |
+17:02:38.9 |
HIP 42764 |
15.40 |
| 2026-06-19 00:00 |
08:42:30.38 |
+16:58:06.1 |
HIP 42764 |
11.24 |
| 2026-06-19 12:00 |
08:43:08.79 |
+16:53:32.6 |
HIP 42814 |
4.36 |
| 2026-06-20 00:00 |
08:43:47.27 |
+16:48:58.4 |
HIP 42814 |
6.33 |
| 2026-06-20 12:00 |
08:44:25.83 |
+16:44:23.5 |
HIP 42814 |
16.53 |
| 2026-06-21 00:00 |
08:45:04.45 |
+16:39:47.9 |
HIP 42968 |
17.91 |
| 2026-06-21 12:00 |
08:45:43.15 |
+16:35:11.6 |
HIP 42968 |
21.83 |
| 2026-06-22 00:00 |
08:46:21.93 |
+16:30:34.6 |
HIP 43058 |
28.38 |