| Parameter |
Value |
| Designation |
P/2020 S5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-08-08T07:36:05.472000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:12Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-09-21T13:27:24.220800Z |
| Discovery magnitude (MPC) |
20.40 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-10-14.0000000 |
| e |
0.33831667 |
| q (au) |
2.678655 |
| a (au) |
4.048244 |
| i (deg) |
12.354134 |
| Ω (om, deg) |
316.000132 |
| ω (w, deg) |
52.998514 |
| M (ma, deg) |
8.069024 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.871 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.871 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
14:34:46.54 |
-28:41:50.4 |
HIP 71170 |
28.34 |
| 2026-07-29 12:00 |
14:34:54.90 |
-28:40:55.7 |
HIP 71471 |
27.86 |
| 2026-07-30 00:00 |
14:35:03.48 |
-28:40:02.0 |
HIP 71471 |
26.09 |
| 2026-07-30 12:00 |
14:35:12.26 |
-28:39:09.4 |
HIP 71471 |
24.31 |
| 2026-07-31 00:00 |
14:35:21.26 |
-28:38:17.8 |
HIP 71471 |
22.55 |
| 2026-07-31 12:00 |
14:35:30.48 |
-28:37:27.3 |
HIP 71471 |
20.80 |
| 2026-08-01 00:00 |
14:35:39.90 |
-28:36:37.9 |
HIP 71471 |
19.10 |
| 2026-08-01 12:00 |
14:35:49.53 |
-28:35:49.5 |
HIP 71471 |
17.47 |
| 2026-08-02 00:00 |
14:35:59.37 |
-28:35:02.1 |
HIP 71471 |
15.94 |
| 2026-08-02 12:00 |
14:36:09.42 |
-28:34:15.8 |
HIP 71471 |
14.57 |
| 2026-08-03 00:00 |
14:36:19.67 |
-28:33:30.6 |
HIP 71471 |
13.42 |
| 2026-08-03 12:00 |
14:36:30.14 |
-28:32:46.4 |
HIP 71471 |
12.58 |
| 2026-08-04 00:00 |
14:36:40.81 |
-28:32:03.3 |
HIP 71471 |
12.13 |
| 2026-08-04 12:00 |
14:36:51.68 |
-28:31:21.3 |
HIP 71471 |
12.15 |
| 2026-08-05 00:00 |
14:37:02.76 |
-28:30:40.3 |
HIP 71471 |
12.64 |
| 2026-08-05 12:00 |
14:37:14.04 |
-28:30:00.3 |
HIP 71471 |
13.59 |
| 2026-08-06 00:00 |
14:37:25.53 |
-28:29:21.4 |
HIP 71471 |
14.92 |
| 2026-08-06 12:00 |
14:37:37.21 |
-28:28:43.5 |
HIP 71471 |
16.56 |
| 2026-08-07 00:00 |
14:37:49.10 |
-28:28:06.7 |
HIP 71471 |
18.44 |
| 2026-08-07 12:00 |
14:38:01.19 |
-28:27:31.0 |
HIP 71471 |
20.52 |
| 2026-08-08 00:00 |
14:38:13.48 |
-28:26:56.3 |
HIP 71471 |
22.75 |
| 2026-08-08 12:00 |
14:38:25.97 |
-28:26:22.6 |
HIP 71688 |
22.26 |
| 2026-08-09 00:00 |
14:38:38.66 |
-28:25:50.0 |
HIP 71688 |
20.32 |
| 2026-08-09 12:00 |
14:38:51.55 |
-28:25:18.4 |
HIP 71688 |
18.57 |
| 2026-08-10 00:00 |
14:39:04.63 |
-28:24:47.9 |
HIP 71688 |
17.09 |
| 2026-08-10 12:00 |
14:39:17.91 |
-28:24:18.4 |
HIP 71688 |
15.98 |
| 2026-08-11 00:00 |
14:39:31.38 |
-28:23:49.9 |
HIP 71688 |
15.33 |
| 2026-08-11 12:00 |
14:39:45.05 |
-28:23:22.5 |
HIP 71688 |
15.24 |
| 2026-08-12 00:00 |
14:39:58.92 |
-28:22:56.1 |
HIP 71688 |
15.73 |
| 2026-08-12 12:00 |
14:40:12.98 |
-28:22:30.7 |
HIP 71688 |
16.77 |
| 2026-08-13 00:00 |
14:40:27.22 |
-28:22:06.4 |
HIP 71688 |
18.30 |
| 2026-08-13 12:00 |
14:40:41.67 |
-28:21:43.1 |
HIP 71688 |
20.22 |
| 2026-08-14 00:00 |
14:40:56.30 |
-28:21:20.8 |
HIP 71862 |
21.97 |
| 2026-08-14 12:00 |
14:41:11.12 |
-28:20:59.5 |
HIP 71862 |
19.84 |
| 2026-08-15 00:00 |
14:41:26.12 |
-28:20:39.3 |
HIP 71862 |
18.05 |
| 2026-08-15 12:00 |
14:41:41.32 |
-28:20:20.0 |
HIP 71862 |
16.76 |
| 2026-08-16 00:00 |
14:41:56.70 |
-28:20:01.8 |
HIP 71862 |
16.08 |
| 2026-08-16 12:00 |
14:42:12.27 |
-28:19:44.6 |
HIP 71862 |
16.14 |
| 2026-08-17 00:00 |
14:42:28.02 |
-28:19:28.3 |
HIP 71862 |
16.95 |
| 2026-08-17 12:00 |
14:42:43.96 |
-28:19:13.1 |
HIP 71862 |
18.42 |
| 2026-08-18 00:00 |
14:43:00.07 |
-28:18:58.8 |
HIP 72035 |
15.05 |
| 2026-08-18 12:00 |
14:43:16.37 |
-28:18:45.5 |
HIP 72035 |
11.56 |
| 2026-08-19 00:00 |
14:43:32.85 |
-28:18:33.2 |
HIP 72035 |
8.11 |