| 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) |
| 2026-07-29 00:00 |
11:39:20.02 |
-09:14:44.1 |
HIP 56883 |
14.08 |
| 2026-07-29 12:00 |
11:39:35.21 |
-09:15:44.6 |
HIP 56883 |
12.27 |
| 2026-07-30 00:00 |
11:39:50.47 |
-09:16:45.8 |
HIP 56883 |
11.53 |
| 2026-07-30 12:00 |
11:40:05.81 |
-09:17:47.8 |
HIP 56883 |
12.06 |
| 2026-07-31 00:00 |
11:40:21.21 |
-09:18:50.5 |
HIP 56883 |
13.75 |
| 2026-07-31 12:00 |
11:40:36.68 |
-09:19:53.9 |
HIP 56883 |
16.24 |
| 2026-08-01 00:00 |
11:40:52.23 |
-09:20:58.1 |
HIP 56883 |
19.25 |
| 2026-08-01 12:00 |
11:41:07.84 |
-09:22:02.9 |
HIP 57049 |
19.67 |
| 2026-08-02 00:00 |
11:41:23.52 |
-09:23:08.5 |
HIP 57049 |
19.26 |
| 2026-08-02 12:00 |
11:41:39.27 |
-09:24:14.8 |
HIP 57132 |
17.54 |
| 2026-08-03 00:00 |
11:41:55.08 |
-09:25:21.8 |
HIP 57132 |
14.10 |
| 2026-08-03 12:00 |
11:42:10.97 |
-09:26:29.5 |
HIP 57132 |
11.07 |
| 2026-08-04 00:00 |
11:42:26.92 |
-09:27:37.9 |
HIP 57132 |
8.93 |
| 2026-08-04 12:00 |
11:42:42.93 |
-09:28:47.0 |
HIP 57132 |
8.40 |
| 2026-08-05 00:00 |
11:42:59.01 |
-09:29:56.8 |
HIP 57132 |
9.77 |
| 2026-08-05 12:00 |
11:43:15.16 |
-09:31:07.3 |
HIP 57132 |
12.46 |
| 2026-08-06 00:00 |
11:43:31.37 |
-09:32:18.4 |
HIP 57132 |
15.81 |
| 2026-08-06 12:00 |
11:43:47.64 |
-09:33:30.3 |
HIP 57132 |
19.49 |
| 2026-08-07 00:00 |
11:44:03.98 |
-09:34:42.9 |
HIP 57132 |
23.37 |
| 2026-08-07 12:00 |
11:44:20.38 |
-09:35:56.1 |
HIP 57132 |
27.36 |
| 2026-08-08 00:00 |
11:44:36.85 |
-09:37:10.0 |
HIP 57180 |
30.79 |
| 2026-08-08 12:00 |
11:44:53.37 |
-09:38:24.6 |
HIP 57213 |
33.69 |
| 2026-08-09 00:00 |
11:45:09.96 |
-09:39:39.9 |
HIP 57213 |
36.71 |
| 2026-08-09 12:00 |
11:45:26.60 |
-09:40:55.8 |
HIP 57213 |
39.97 |
| 2026-08-10 00:00 |
11:45:43.31 |
-09:42:12.4 |
HIP 57472 |
37.86 |
| 2026-08-10 12:00 |
11:46:00.08 |
-09:43:29.7 |
HIP 57472 |
34.99 |
| 2026-08-11 00:00 |
11:46:16.90 |
-09:44:47.6 |
HIP 57472 |
32.44 |
| 2026-08-11 12:00 |
11:46:33.79 |
-09:46:06.2 |
HIP 57472 |
30.28 |
| 2026-08-12 00:00 |
11:46:50.73 |
-09:47:25.4 |
HIP 57472 |
28.62 |
| 2026-08-12 12:00 |
11:47:07.72 |
-09:48:45.3 |
HIP 57472 |
27.55 |
| 2026-08-13 00:00 |
11:47:24.78 |
-09:50:05.8 |
HIP 57472 |
27.15 |
| 2026-08-13 12:00 |
11:47:41.89 |
-09:51:27.0 |
HIP 57472 |
27.46 |
| 2026-08-14 00:00 |
11:47:59.05 |
-09:52:48.8 |
HIP 57587 |
26.65 |
| 2026-08-14 12:00 |
11:48:16.27 |
-09:54:11.2 |
HIP 57587 |
24.65 |
| 2026-08-15 00:00 |
11:48:33.55 |
-09:55:34.2 |
HIP 57587 |
23.33 |
| 2026-08-15 12:00 |
11:48:50.87 |
-09:56:57.9 |
HIP 57587 |
22.82 |
| 2026-08-16 00:00 |
11:49:08.25 |
-09:58:22.2 |
HIP 57758 |
23.16 |
| 2026-08-16 12:00 |
11:49:25.68 |
-09:59:47.1 |
HIP 57758 |
19.05 |
| 2026-08-17 00:00 |
11:49:43.16 |
-10:01:12.6 |
HIP 57758 |
15.16 |
| 2026-08-17 12:00 |
11:50:00.69 |
-10:02:38.7 |
HIP 57758 |
11.74 |
| 2026-08-18 00:00 |
11:50:18.27 |
-10:04:05.4 |
HIP 57758 |
9.33 |
| 2026-08-18 12:00 |
11:50:35.90 |
-10:05:32.7 |
HIP 57758 |
8.84 |
| 2026-08-19 00:00 |
11:50:53.58 |
-10:07:00.6 |
HIP 57758 |
10.55 |