| 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) |
| 2026-03-26 00:00 |
15:23:43.55 |
-33:22:36.9 |
HIP 75486 |
20.96 |
| 2026-03-26 12:00 |
15:23:35.30 |
-33:23:28.4 |
HIP 75486 |
22.16 |
| 2026-03-27 00:00 |
15:23:26.81 |
-33:24:18.9 |
HIP 75239 |
22.43 |
| 2026-03-27 12:00 |
15:23:18.09 |
-33:25:08.2 |
HIP 75239 |
20.76 |
| 2026-03-28 00:00 |
15:23:09.14 |
-33:25:56.4 |
HIP 75239 |
19.16 |
| 2026-03-28 12:00 |
15:22:59.95 |
-33:26:43.4 |
HIP 75239 |
17.63 |
| 2026-03-29 00:00 |
15:22:50.53 |
-33:27:29.3 |
HIP 75239 |
16.24 |
| 2026-03-29 12:00 |
15:22:40.88 |
-33:28:13.9 |
HIP 75239 |
15.02 |
| 2026-03-30 00:00 |
15:22:31.00 |
-33:28:57.4 |
HIP 75239 |
14.04 |
| 2026-03-30 12:00 |
15:22:20.89 |
-33:29:39.7 |
HIP 75239 |
13.37 |
| 2026-03-31 00:00 |
15:22:10.55 |
-33:30:20.8 |
HIP 75239 |
13.09 |
| 2026-03-31 12:00 |
15:22:00.00 |
-33:31:00.7 |
HIP 75239 |
13.22 |
| 2026-04-01 00:00 |
15:21:49.20 |
-33:31:39.3 |
HIP 75120 |
13.78 |
| 2026-04-01 12:00 |
15:21:38.19 |
-33:32:16.8 |
HIP 75120 |
12.81 |
| 2026-04-02 00:00 |
15:21:26.95 |
-33:32:52.9 |
HIP 75120 |
12.19 |
| 2026-04-02 12:00 |
15:21:15.49 |
-33:33:27.8 |
HIP 75120 |
12.01 |
| 2026-04-03 00:00 |
15:21:03.81 |
-33:34:01.5 |
HIP 75120 |
12.30 |
| 2026-04-03 12:00 |
15:20:51.91 |
-33:34:33.9 |
HIP 75120 |
13.06 |
| 2026-04-04 00:00 |
15:20:39.79 |
-33:35:04.9 |
HIP 75120 |
14.24 |
| 2026-04-04 12:00 |
15:20:27.46 |
-33:35:34.7 |
HIP 75120 |
15.75 |
| 2026-04-05 00:00 |
15:20:14.91 |
-33:36:03.2 |
HIP 75120 |
17.54 |
| 2026-04-05 12:00 |
15:20:02.14 |
-33:36:30.4 |
HIP 75120 |
19.54 |
| 2026-04-06 00:00 |
15:19:49.17 |
-33:36:56.2 |
HIP 75120 |
21.70 |
| 2026-04-06 12:00 |
15:19:35.98 |
-33:37:20.8 |
HIP 75120 |
24.01 |
| 2026-04-07 00:00 |
15:19:22.58 |
-33:37:43.9 |
HIP 74985 |
24.21 |
| 2026-04-07 12:00 |
15:19:08.97 |
-33:38:05.8 |
HIP 74985 |
24.01 |
| 2026-04-08 00:00 |
15:18:55.16 |
-33:38:26.2 |
HIP 74985 |
24.18 |
| 2026-04-08 12:00 |
15:18:41.15 |
-33:38:45.3 |
HIP 74985 |
24.72 |
| 2026-04-09 00:00 |
15:18:26.93 |
-33:39:03.0 |
HIP 74985 |
25.62 |
| 2026-04-09 12:00 |
15:18:12.51 |
-33:39:19.3 |
HIP 74985 |
26.87 |
| 2026-04-10 00:00 |
15:17:57.89 |
-33:39:34.2 |
HIP 74985 |
28.43 |
| 2026-04-10 12:00 |
15:17:43.08 |
-33:39:47.7 |
HIP 74985 |
30.26 |
| 2026-04-11 00:00 |
15:17:28.07 |
-33:39:59.8 |
HIP 74985 |
32.32 |
| 2026-04-11 12:00 |
15:17:12.86 |
-33:40:10.5 |
HIP 74614 |
34.07 |
| 2026-04-12 00:00 |
15:16:57.47 |
-33:40:19.8 |
HIP 74614 |
31.10 |
| 2026-04-12 12:00 |
15:16:41.89 |
-33:40:27.6 |
HIP 74614 |
28.17 |
| 2026-04-13 00:00 |
15:16:26.13 |
-33:40:33.9 |
HIP 74614 |
25.29 |
| 2026-04-13 12:00 |
15:16:10.18 |
-33:40:38.8 |
HIP 74614 |
22.50 |
| 2026-04-14 00:00 |
15:15:54.05 |
-33:40:42.3 |
HIP 74614 |
19.86 |
| 2026-04-14 12:00 |
15:15:37.74 |
-33:40:44.3 |
HIP 74614 |
17.47 |
| 2026-04-15 00:00 |
15:15:21.25 |
-33:40:44.8 |
HIP 74614 |
15.45 |
| 2026-04-15 12:00 |
15:15:04.59 |
-33:40:43.8 |
HIP 74614 |
14.00 |
| 2026-04-16 00:00 |
15:14:47.77 |
-33:40:41.4 |
HIP 74614 |
13.34 |