| Parameter |
Value |
| Designation |
P/2019 S3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-08-26T02:18:33.667200Z |
| Orbit solution date (soln_date, UTC) |
2022-04-11T23:22:27Z |
| Obs used |
61 |
| NEO |
- |
| M1 |
18.000 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-09-25T12:51:09.792000Z |
| Discovery magnitude (MPC) |
20.70 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-10-03.0000000 |
| e |
0.47064656 |
| q (au) |
1.806781 |
| a (au) |
3.413185 |
| i (deg) |
8.692614 |
| Ω (om, deg) |
150.170410 |
| ω (w, deg) |
212.950167 |
| M (ma, deg) |
5.924433 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.619 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.619 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.552 |
| k |
0.800 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
02:13:57.73 |
+07:03:50.8 |
HIP 10442 |
26.24 |
| 2026-03-26 12:00 |
02:15:06.52 |
+07:09:49.3 |
HIP 10500 |
20.24 |
| 2026-03-27 00:00 |
02:16:15.29 |
+07:15:46.5 |
HIP 10500 |
19.25 |
| 2026-03-27 12:00 |
02:17:24.04 |
+07:21:42.2 |
HIP 10781 |
28.97 |
| 2026-03-28 00:00 |
02:18:32.76 |
+07:27:36.6 |
HIP 10781 |
15.10 |
| 2026-03-28 12:00 |
02:19:41.46 |
+07:33:29.5 |
HIP 10781 |
16.34 |
| 2026-03-29 00:00 |
02:20:50.14 |
+07:39:21.1 |
HIP 10920 |
28.94 |
| 2026-03-29 12:00 |
02:21:58.79 |
+07:45:11.2 |
HIP 11005 |
34.41 |
| 2026-03-30 00:00 |
02:23:07.41 |
+07:50:59.8 |
HIP 11106 |
41.82 |
| 2026-03-30 12:00 |
02:24:16.01 |
+07:56:47.1 |
HIP 11338 |
27.71 |
| 2026-03-31 00:00 |
02:25:24.59 |
+08:02:32.8 |
HIP 11338 |
10.79 |
| 2026-03-31 12:00 |
02:26:33.14 |
+08:08:17.1 |
HIP 11338 |
10.37 |
| 2026-04-01 00:00 |
02:27:41.67 |
+08:14:00.0 |
HIP 11484 |
15.25 |
| 2026-04-01 12:00 |
02:28:50.17 |
+08:19:41.3 |
HIP 11564 |
3.86 |
| 2026-04-02 00:00 |
02:29:58.65 |
+08:25:21.2 |
HIP 11608 |
5.75 |
| 2026-04-02 12:00 |
02:31:07.10 |
+08:30:59.6 |
HIP 11707 |
8.12 |
| 2026-04-03 00:00 |
02:32:15.53 |
+08:36:36.5 |
HIP 11735 |
19.61 |
| 2026-04-03 12:00 |
02:33:23.93 |
+08:42:11.9 |
HIP 11975 |
16.30 |
| 2026-04-04 00:00 |
02:34:32.31 |
+08:47:45.8 |
HIP 11975 |
9.21 |
| 2026-04-04 12:00 |
02:35:40.66 |
+08:53:18.1 |
HIP 11975 |
23.15 |
| 2026-04-05 00:00 |
02:36:48.99 |
+08:58:49.0 |
HIP 12253 |
14.16 |
| 2026-04-05 12:00 |
02:37:57.30 |
+09:04:18.3 |
HIP 12253 |
7.20 |
| 2026-04-06 00:00 |
02:39:05.58 |
+09:09:46.1 |
HIP 12348 |
14.65 |
| 2026-04-06 12:00 |
02:40:13.84 |
+09:15:12.3 |
HIP 12451 |
14.66 |
| 2026-04-07 00:00 |
02:41:22.07 |
+09:20:36.9 |
HIP 12451 |
25.58 |
| 2026-04-07 12:00 |
02:42:30.27 |
+09:26:00.0 |
HIP 12529 |
27.69 |
| 2026-04-08 00:00 |
02:43:38.46 |
+09:31:21.6 |
HIP 12794 |
21.07 |
| 2026-04-08 12:00 |
02:44:46.61 |
+09:36:41.6 |
HIP 12853 |
11.86 |
| 2026-04-09 00:00 |
02:45:54.75 |
+09:42:00.0 |
HIP 12853 |
10.57 |
| 2026-04-09 12:00 |
02:47:02.85 |
+09:47:16.7 |
HIP 12853 |
26.49 |
| 2026-04-10 00:00 |
02:48:10.94 |
+09:52:31.9 |
HIP 13043 |
22.61 |
| 2026-04-10 12:00 |
02:49:18.99 |
+09:57:45.5 |
HIP 13043 |
29.58 |
| 2026-04-11 00:00 |
02:50:27.02 |
+10:02:57.5 |
HIP 13342 |
40.34 |
| 2026-04-11 12:00 |
02:51:35.03 |
+10:08:07.9 |
HIP 13342 |
30.65 |
| 2026-04-12 00:00 |
02:52:43.01 |
+10:13:16.6 |
HIP 13342 |
29.42 |
| 2026-04-12 12:00 |
02:53:50.97 |
+10:18:23.8 |
HIP 13611 |
24.42 |
| 2026-04-13 00:00 |
02:54:58.90 |
+10:23:29.3 |
HIP 13611 |
7.17 |
| 2026-04-13 12:00 |
02:56:06.80 |
+10:28:33.1 |
HIP 13611 |
10.77 |
| 2026-04-14 00:00 |
02:57:14.68 |
+10:33:35.3 |
HIP 13748 |
6.14 |
| 2026-04-14 12:00 |
02:58:22.53 |
+10:38:35.8 |
HIP 13759 |
20.76 |
| 2026-04-15 00:00 |
02:59:30.36 |
+10:43:34.7 |
HIP 13982 |
9.51 |
| 2026-04-15 12:00 |
03:00:38.15 |
+10:48:31.9 |
HIP 14036 |
3.97 |
| 2026-04-16 00:00 |
03:01:45.92 |
+10:53:27.4 |
HIP 14036 |
15.23 |