| 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) |
| 2026-09-20 00:00 |
07:55:58.96 |
+14:47:46.3 |
HIP 38837 |
16.51 |
| 2026-09-20 12:00 |
07:56:34.95 |
+14:45:52.4 |
HIP 38837 |
12.84 |
| 2026-09-21 00:00 |
07:57:10.73 |
+14:43:58.5 |
HIP 38837 |
14.66 |
| 2026-09-21 12:00 |
07:57:46.32 |
+14:42:04.6 |
HIP 38837 |
20.50 |
| 2026-09-22 00:00 |
07:58:21.71 |
+14:40:10.6 |
HIP 38837 |
27.92 |
| 2026-09-22 12:00 |
07:58:56.90 |
+14:38:16.5 |
HIP 39178 |
26.74 |
| 2026-09-23 00:00 |
07:59:31.89 |
+14:36:22.4 |
HIP 39178 |
18.43 |
| 2026-09-23 12:00 |
08:00:06.67 |
+14:34:28.3 |
HIP 39178 |
10.77 |
| 2026-09-24 00:00 |
08:00:41.26 |
+14:32:34.3 |
HIP 39178 |
6.42 |
| 2026-09-24 12:00 |
08:01:15.64 |
+14:30:40.2 |
HIP 39178 |
10.63 |
| 2026-09-25 00:00 |
08:01:49.82 |
+14:28:46.1 |
HIP 39178 |
18.14 |
| 2026-09-25 12:00 |
08:02:23.80 |
+14:26:52.1 |
HIP 39178 |
26.21 |
| 2026-09-26 00:00 |
08:02:57.56 |
+14:24:58.1 |
HIP 39427 |
21.43 |
| 2026-09-26 12:00 |
08:03:31.13 |
+14:23:04.1 |
HIP 39427 |
17.66 |
| 2026-09-27 00:00 |
08:04:04.48 |
+14:21:10.2 |
HIP 39427 |
17.41 |
| 2026-09-27 12:00 |
08:04:37.63 |
+14:19:16.4 |
HIP 39427 |
20.75 |
| 2026-09-28 00:00 |
08:05:10.57 |
+14:17:22.7 |
HIP 39427 |
26.31 |
| 2026-09-28 12:00 |
08:05:43.29 |
+14:15:29.0 |
HIP 39578 |
30.62 |
| 2026-09-29 00:00 |
08:06:15.81 |
+14:13:35.5 |
HIP 39809 |
27.19 |
| 2026-09-29 12:00 |
08:06:48.12 |
+14:11:42.1 |
HIP 39809 |
20.57 |
| 2026-09-30 00:00 |
08:07:20.21 |
+14:09:48.8 |
HIP 39809 |
15.40 |
| 2026-09-30 12:00 |
08:07:52.09 |
+14:07:55.6 |
HIP 39809 |
13.41 |
| 2026-10-01 00:00 |
08:08:23.75 |
+14:06:02.6 |
HIP 39809 |
15.75 |
| 2026-10-01 12:00 |
08:08:55.19 |
+14:04:09.8 |
HIP 39809 |
20.98 |
| 2026-10-02 00:00 |
08:09:26.42 |
+14:02:17.1 |
HIP 39874 |
26.11 |
| 2026-10-02 12:00 |
08:09:57.43 |
+14:00:24.7 |
HIP 39874 |
28.52 |
| 2026-10-03 00:00 |
08:10:28.22 |
+13:58:32.4 |
HIP 40177 |
27.70 |
| 2026-10-03 12:00 |
08:10:58.78 |
+13:56:40.4 |
HIP 40177 |
20.55 |
| 2026-10-04 00:00 |
08:11:29.12 |
+13:54:48.5 |
HIP 40177 |
13.98 |
| 2026-10-04 12:00 |
08:11:59.24 |
+13:52:57.0 |
HIP 40177 |
9.18 |
| 2026-10-05 00:00 |
08:12:29.14 |
+13:51:05.6 |
HIP 40232 |
9.17 |
| 2026-10-05 12:00 |
08:12:58.80 |
+13:49:14.6 |
HIP 40232 |
6.76 |
| 2026-10-06 00:00 |
08:13:28.24 |
+13:47:23.8 |
HIP 40232 |
10.81 |
| 2026-10-06 12:00 |
08:13:57.45 |
+13:45:33.3 |
HIP 40232 |
17.19 |
| 2026-10-07 00:00 |
08:14:26.42 |
+13:43:43.2 |
HIP 40232 |
24.06 |
| 2026-10-07 12:00 |
08:14:55.16 |
+13:41:53.3 |
HIP 40232 |
31.06 |
| 2026-10-08 00:00 |
08:15:23.67 |
+13:40:03.8 |
HIP 40657 |
37.83 |
| 2026-10-08 12:00 |
08:15:51.95 |
+13:38:14.6 |
HIP 40657 |
30.93 |
| 2026-10-09 00:00 |
08:16:19.98 |
+13:36:25.9 |
HIP 40657 |
24.20 |
| 2026-10-09 12:00 |
08:16:47.78 |
+13:34:37.4 |
HIP 40657 |
17.77 |
| 2026-10-10 00:00 |
08:17:15.34 |
+13:32:49.4 |
HIP 40657 |
12.03 |
| 2026-10-10 12:00 |
08:17:42.66 |
+13:31:01.8 |
HIP 40657 |
8.39 |
| 2026-10-11 00:00 |
08:18:09.74 |
+13:29:14.6 |
HIP 40657 |
9.50 |