| 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) |
| 2026-06-01 00:00 |
11:20:53.50 |
-08:53:40.1 |
HIP 55364 |
10.25 |
| 2026-06-01 12:00 |
11:20:56.17 |
-08:52:58.6 |
HIP 55364 |
10.81 |
| 2026-06-02 00:00 |
11:20:58.97 |
-08:52:17.9 |
HIP 55364 |
11.45 |
| 2026-06-02 12:00 |
11:21:01.91 |
-08:51:38.2 |
HIP 55364 |
12.17 |
| 2026-06-03 00:00 |
11:21:04.98 |
-08:50:59.3 |
HIP 55364 |
12.96 |
| 2026-06-03 12:00 |
11:21:08.20 |
-08:50:21.4 |
HIP 55364 |
13.81 |
| 2026-06-04 00:00 |
11:21:11.55 |
-08:49:44.4 |
HIP 55364 |
14.71 |
| 2026-06-04 12:00 |
11:21:15.04 |
-08:49:08.3 |
HIP 55364 |
15.65 |
| 2026-06-05 00:00 |
11:21:18.66 |
-08:48:33.1 |
HIP 55364 |
16.64 |
| 2026-06-05 12:00 |
11:21:22.42 |
-08:47:58.9 |
HIP 55531 |
16.59 |
| 2026-06-06 00:00 |
11:21:26.32 |
-08:47:25.5 |
HIP 55531 |
15.74 |
| 2026-06-06 12:00 |
11:21:30.35 |
-08:46:53.1 |
HIP 55531 |
14.89 |
| 2026-06-07 00:00 |
11:21:34.52 |
-08:46:21.6 |
HIP 55531 |
14.04 |
| 2026-06-07 12:00 |
11:21:38.82 |
-08:45:51.1 |
HIP 55531 |
13.20 |
| 2026-06-08 00:00 |
11:21:43.25 |
-08:45:21.5 |
HIP 55531 |
12.39 |
| 2026-06-08 12:00 |
11:21:47.82 |
-08:44:52.8 |
HIP 55531 |
11.60 |
| 2026-06-09 00:00 |
11:21:52.52 |
-08:44:25.0 |
HIP 55531 |
10.85 |
| 2026-06-09 12:00 |
11:21:57.36 |
-08:43:58.2 |
HIP 55531 |
10.18 |
| 2026-06-10 00:00 |
11:22:02.32 |
-08:43:32.3 |
HIP 55531 |
9.59 |
| 2026-06-10 12:00 |
11:22:07.42 |
-08:43:07.4 |
HIP 55531 |
9.11 |
| 2026-06-11 00:00 |
11:22:12.66 |
-08:42:43.3 |
HIP 55531 |
8.79 |
| 2026-06-11 12:00 |
11:22:18.02 |
-08:42:20.3 |
HIP 55531 |
8.64 |
| 2026-06-12 00:00 |
11:22:23.51 |
-08:41:58.1 |
HIP 55531 |
8.69 |
| 2026-06-12 12:00 |
11:22:29.14 |
-08:41:37.0 |
HIP 55531 |
8.94 |
| 2026-06-13 00:00 |
11:22:34.89 |
-08:41:16.7 |
HIP 55531 |
9.40 |
| 2026-06-13 12:00 |
11:22:40.78 |
-08:40:57.4 |
HIP 55531 |
10.05 |
| 2026-06-14 00:00 |
11:22:46.79 |
-08:40:39.1 |
HIP 55531 |
10.86 |
| 2026-06-14 12:00 |
11:22:52.93 |
-08:40:21.7 |
HIP 55531 |
11.82 |
| 2026-06-15 00:00 |
11:22:59.20 |
-08:40:05.2 |
HIP 55531 |
12.90 |
| 2026-06-15 12:00 |
11:23:05.60 |
-08:39:49.7 |
HIP 55531 |
14.07 |
| 2026-06-16 00:00 |
11:23:12.13 |
-08:39:35.2 |
HIP 55531 |
15.34 |
| 2026-06-16 12:00 |
11:23:18.78 |
-08:39:21.6 |
HIP 55531 |
16.68 |
| 2026-06-17 00:00 |
11:23:25.55 |
-08:39:08.9 |
HIP 55531 |
18.09 |
| 2026-06-17 12:00 |
11:23:32.46 |
-08:38:57.2 |
HIP 55531 |
19.56 |
| 2026-06-18 00:00 |
11:23:39.49 |
-08:38:46.4 |
HIP 55531 |
21.08 |
| 2026-06-18 12:00 |
11:23:46.64 |
-08:38:36.6 |
HIP 55730 |
22.20 |
| 2026-06-19 00:00 |
11:23:53.91 |
-08:38:27.7 |
HIP 55730 |
20.54 |
| 2026-06-19 12:00 |
11:24:01.31 |
-08:38:19.8 |
HIP 55730 |
18.89 |
| 2026-06-20 00:00 |
11:24:08.83 |
-08:38:12.8 |
HIP 55730 |
17.26 |
| 2026-06-20 12:00 |
11:24:16.47 |
-08:38:06.7 |
HIP 55730 |
15.67 |
| 2026-06-21 00:00 |
11:24:24.23 |
-08:38:01.6 |
HIP 55730 |
14.14 |
| 2026-06-21 12:00 |
11:24:32.11 |
-08:37:57.4 |
HIP 55730 |
12.71 |
| 2026-06-22 00:00 |
11:24:40.12 |
-08:37:54.2 |
HIP 55730 |
11.43 |