| Parameter |
Value |
| Designation |
P/2020 R5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-05-28T02:51:58.855680Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:23Z |
| Obs used |
101 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
20.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-09-14T10:23:59.971200Z |
| Discovery magnitude (MPC) |
20.53 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-06-29.0000000 |
| e |
0.31447611 |
| q (au) |
3.413047 |
| a (au) |
4.978743 |
| i (deg) |
11.454347 |
| Ω (om, deg) |
272.968571 |
| ω (w, deg) |
82.307441 |
| M (ma, deg) |
2.828464 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.343 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.343 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.586 |
| k |
0.999 |
| δ90 |
9.996 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-25 00:00 |
12:14:18.28 |
-12:18:19.4 |
HIP 59839 |
33.06 |
| 2026-09-25 12:00 |
12:14:38.04 |
-12:20:20.8 |
HIP 59839 |
30.26 |
| 2026-09-26 00:00 |
12:14:57.81 |
-12:22:22.5 |
HIP 59839 |
28.18 |
| 2026-09-26 12:00 |
12:15:17.58 |
-12:24:24.5 |
HIP 59839 |
26.97 |
| 2026-09-27 00:00 |
12:15:37.37 |
-12:26:26.8 |
HIP 59839 |
26.75 |
| 2026-09-27 12:00 |
12:15:57.15 |
-12:28:29.4 |
HIP 59839 |
27.56 |
| 2026-09-28 00:00 |
12:16:16.95 |
-12:30:32.3 |
HIP 59839 |
29.30 |
| 2026-09-28 12:00 |
12:16:36.74 |
-12:32:35.4 |
HIP 59839 |
31.83 |
| 2026-09-29 00:00 |
12:16:56.54 |
-12:34:38.8 |
HIP 59839 |
34.98 |
| 2026-09-29 12:00 |
12:17:16.35 |
-12:36:42.5 |
HIP 59839 |
38.59 |
| 2026-09-30 00:00 |
12:17:36.16 |
-12:38:46.5 |
HIP 59839 |
42.55 |
| 2026-09-30 12:00 |
12:17:55.97 |
-12:40:50.7 |
HIP 60213 |
43.92 |
| 2026-10-01 00:00 |
12:18:15.78 |
-12:42:55.2 |
HIP 60213 |
38.74 |
| 2026-10-01 12:00 |
12:18:35.59 |
-12:45:00.0 |
HIP 60213 |
33.59 |
| 2026-10-02 00:00 |
12:18:55.40 |
-12:47:05.0 |
HIP 60213 |
28.48 |
| 2026-10-02 12:00 |
12:19:15.22 |
-12:49:10.3 |
HIP 60213 |
23.44 |
| 2026-10-03 00:00 |
12:19:35.03 |
-12:51:15.8 |
HIP 60213 |
18.52 |
| 2026-10-03 12:00 |
12:19:54.85 |
-12:53:21.6 |
HIP 60213 |
13.86 |
| 2026-10-04 00:00 |
12:20:14.66 |
-12:55:27.6 |
HIP 60213 |
9.83 |
| 2026-10-04 12:00 |
12:20:34.47 |
-12:57:33.9 |
HIP 60213 |
7.53 |
| 2026-10-05 00:00 |
12:20:54.28 |
-12:59:40.4 |
HIP 60213 |
8.51 |
| 2026-10-05 12:00 |
12:21:14.08 |
-13:01:47.1 |
HIP 60213 |
11.98 |
| 2026-10-06 00:00 |
12:21:33.88 |
-13:03:54.1 |
HIP 60213 |
16.44 |
| 2026-10-06 12:00 |
12:21:53.68 |
-13:06:01.3 |
HIP 60372 |
12.74 |
| 2026-10-07 00:00 |
12:22:13.47 |
-13:08:08.7 |
HIP 60372 |
7.98 |
| 2026-10-07 12:00 |
12:22:33.26 |
-13:10:16.3 |
HIP 60372 |
4.54 |
| 2026-10-08 00:00 |
12:22:53.04 |
-13:12:24.2 |
HIP 60372 |
5.74 |
| 2026-10-08 12:00 |
12:23:12.81 |
-13:14:32.2 |
HIP 60372 |
10.04 |
| 2026-10-09 00:00 |
12:23:32.58 |
-13:16:40.4 |
HIP 60372 |
14.97 |
| 2026-10-09 12:00 |
12:23:52.34 |
-13:18:48.9 |
HIP 60372 |
20.07 |
| 2026-10-10 00:00 |
12:24:12.09 |
-13:20:57.5 |
HIP 60620 |
18.22 |
| 2026-10-10 12:00 |
12:24:31.83 |
-13:23:06.4 |
HIP 60620 |
13.70 |
| 2026-10-11 00:00 |
12:24:51.56 |
-13:25:15.4 |
HIP 60620 |
9.95 |
| 2026-10-11 12:00 |
12:25:11.27 |
-13:27:24.6 |
HIP 60620 |
8.11 |
| 2026-10-12 00:00 |
12:25:30.98 |
-13:29:33.9 |
HIP 60620 |
9.37 |
| 2026-10-12 12:00 |
12:25:50.68 |
-13:31:43.5 |
HIP 60620 |
12.85 |
| 2026-10-13 00:00 |
12:26:10.36 |
-13:33:53.2 |
HIP 60711 |
14.76 |
| 2026-10-13 12:00 |
12:26:30.03 |
-13:36:03.0 |
HIP 60711 |
11.65 |
| 2026-10-14 00:00 |
12:26:49.68 |
-13:38:13.0 |
HIP 60711 |
10.42 |
| 2026-10-14 12:00 |
12:27:09.32 |
-13:40:23.2 |
HIP 60711 |
11.68 |
| 2026-10-15 00:00 |
12:27:28.95 |
-13:42:33.5 |
HIP 60711 |
14.79 |
| 2026-10-15 12:00 |
12:27:48.55 |
-13:44:44.0 |
HIP 60711 |
18.86 |
| 2026-10-16 00:00 |
12:28:08.14 |
-13:46:54.6 |
HIP 60711 |
23.40 |