P/2019 S3 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
00:15:12.10 |
-04:27:43.3 |
HIP 1380 |
30.84 |
| 2026-02-03 12:00 |
00:16:22.94 |
-04:20:35.3 |
HIP 1380 |
14.62 |
| 2026-02-04 00:00 |
00:17:33.77 |
-04:13:27.2 |
HIP 1380 |
14.21 |
| 2026-02-04 12:00 |
00:18:44.57 |
-04:06:18.9 |
HIP 1380 |
30.26 |
| 2026-02-05 00:00 |
00:19:55.36 |
-03:59:10.5 |
HIP 1661 |
15.56 |
| 2026-02-05 12:00 |
00:21:06.13 |
-03:52:02.0 |
HIP 1661 |
15.49 |
| 2026-02-06 00:00 |
00:22:16.88 |
-03:44:53.4 |
HIP 1825 |
14.97 |
| 2026-02-06 12:00 |
00:23:27.61 |
-03:37:44.7 |
HIP 1825 |
5.68 |
| 2026-02-07 00:00 |
00:24:38.32 |
-03:30:36.0 |
HIP 1900 |
9.83 |
| 2026-02-07 12:00 |
00:25:49.02 |
-03:23:27.2 |
HIP 1900 |
27.72 |
| 2026-02-08 00:00 |
00:26:59.69 |
-03:16:18.4 |
HIP 2312 |
39.18 |
| 2026-02-08 12:00 |
00:28:10.35 |
-03:09:09.7 |
HIP 2312 |
27.38 |
| 2026-02-09 00:00 |
00:29:20.99 |
-03:02:00.9 |
HIP 2323 |
12.44 |
| 2026-02-09 12:00 |
00:30:31.62 |
-02:54:52.2 |
HIP 2323 |
13.87 |
| 2026-02-10 00:00 |
00:31:42.22 |
-02:47:43.6 |
HIP 2654 |
29.16 |
| 2026-02-10 12:00 |
00:32:52.81 |
-02:40:35.0 |
HIP 2654 |
11.84 |
| 2026-02-11 00:00 |
00:34:03.38 |
-02:33:26.5 |
HIP 2698 |
10.03 |
| 2026-02-11 12:00 |
00:35:13.93 |
-02:26:18.1 |
HIP 2698 |
14.80 |
| 2026-02-12 00:00 |
00:36:24.47 |
-02:19:09.9 |
HIP 2786 |
19.97 |
| 2026-02-12 12:00 |
00:37:34.98 |
-02:12:01.8 |
HIP 3090 |
29.47 |
| 2026-02-13 00:00 |
00:38:45.48 |
-02:04:53.9 |
HIP 3090 |
10.79 |
| 2026-02-13 12:00 |
00:39:55.96 |
-01:57:46.1 |
HIP 3090 |
9.28 |
| 2026-02-14 00:00 |
00:41:06.42 |
-01:50:38.6 |
HIP 3183 |
9.59 |
| 2026-02-14 12:00 |
00:42:16.87 |
-01:43:31.2 |
HIP 3183 |
26.27 |
| 2026-02-15 00:00 |
00:43:27.29 |
-01:36:24.2 |
HIP 3439 |
9.78 |
| 2026-02-15 12:00 |
00:44:37.70 |
-01:29:17.3 |
HIP 3439 |
11.31 |
| 2026-02-16 00:00 |
00:45:48.09 |
-01:22:10.8 |
HIP 3582 |
11.12 |
| 2026-02-16 12:00 |
00:46:58.46 |
-01:15:04.5 |
HIP 3674 |
0.67 |
| 2026-02-17 00:00 |
00:48:08.82 |
-01:07:58.6 |
HIP 3789 |
17.14 |
| 2026-02-17 12:00 |
00:49:19.15 |
-01:00:53.0 |
HIP 3789 |
24.07 |
| 2026-02-18 00:00 |
00:50:29.47 |
-00:53:47.7 |
HIP 4013 |
27.51 |
| 2026-02-18 12:00 |
00:51:39.76 |
-00:46:42.8 |
HIP 4180 |
25.79 |
| 2026-02-19 00:00 |
00:52:50.04 |
-00:39:38.4 |
HIP 4180 |
10.74 |
| 2026-02-19 12:00 |
00:54:00.30 |
-00:32:34.3 |
HIP 4180 |
16.81 |
| 2026-02-20 00:00 |
00:55:10.54 |
-00:25:30.6 |
HIP 4336 |
27.29 |
| 2026-02-20 12:00 |
00:56:20.76 |
-00:18:27.4 |
HIP 4336 |
22.96 |
| 2026-02-21 00:00 |
00:57:30.96 |
-00:11:24.6 |
HIP 4614 |
24.19 |
| 2026-02-21 12:00 |
00:58:41.14 |
-00:04:22.4 |
HIP 4614 |
7.80 |
| 2026-02-22 00:00 |
00:59:51.29 |
+00:02:39.4 |
HIP 4614 |
15.85 |
| 2026-02-22 12:00 |
01:01:01.43 |
+00:09:40.6 |
HIP 4795 |
30.04 |
| 2026-02-23 00:00 |
01:02:11.55 |
+00:16:41.4 |
HIP 4795 |
37.10 |
| 2026-02-23 12:00 |
01:03:21.64 |
+00:23:41.5 |
HIP 5017 |
19.25 |
| 2026-02-24 00:00 |
01:04:31.72 |
+00:30:41.1 |
HIP 5017 |
7.17 |