| 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
$$
M_a = (9.349 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.349 |
| n |
6.000 |
| gf |
0.975 |
| gb |
-0.585 |
| k |
0.999 |
| δ90 |
9.589 |
| 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) |
| 2026-03-26 00:00 |
11:35:11.95 |
-11:59:04.2 |
HIP 56494 |
7.45 |
| 2026-03-26 12:00 |
11:34:58.74 |
-11:57:32.3 |
HIP 56494 |
7.77 |
| 2026-03-27 00:00 |
11:34:45.57 |
-11:56:00.0 |
HIP 56494 |
9.53 |
| 2026-03-27 12:00 |
11:34:32.44 |
-11:54:27.2 |
HIP 56494 |
12.12 |
| 2026-03-28 00:00 |
11:34:19.36 |
-11:52:53.9 |
HIP 56494 |
15.10 |
| 2026-03-28 12:00 |
11:34:06.33 |
-11:51:20.3 |
HIP 56494 |
18.30 |
| 2026-03-29 00:00 |
11:33:53.35 |
-11:49:46.2 |
HIP 56327 |
19.50 |
| 2026-03-29 12:00 |
11:33:40.42 |
-11:48:11.8 |
HIP 56327 |
18.33 |
| 2026-03-30 00:00 |
11:33:27.55 |
-11:46:36.9 |
HIP 56327 |
17.80 |
| 2026-03-30 12:00 |
11:33:14.73 |
-11:45:01.7 |
HIP 56327 |
17.98 |
| 2026-03-31 00:00 |
11:33:01.97 |
-11:43:26.2 |
HIP 56266 |
15.08 |
| 2026-03-31 12:00 |
11:32:49.27 |
-11:41:50.3 |
HIP 56266 |
11.68 |
| 2026-04-01 00:00 |
11:32:36.63 |
-11:40:14.1 |
HIP 56266 |
8.38 |
| 2026-04-01 12:00 |
11:32:24.06 |
-11:38:37.6 |
HIP 56266 |
5.33 |
| 2026-04-02 00:00 |
11:32:11.54 |
-11:37:00.8 |
HIP 56266 |
3.31 |
| 2026-04-02 12:00 |
11:31:59.10 |
-11:35:23.7 |
HIP 56266 |
4.17 |
| 2026-04-03 00:00 |
11:31:46.72 |
-11:33:46.4 |
HIP 56266 |
6.90 |
| 2026-04-03 12:00 |
11:31:34.41 |
-11:32:08.8 |
HIP 56266 |
10.06 |
| 2026-04-04 00:00 |
11:31:22.17 |
-11:30:31.0 |
HIP 56266 |
13.35 |
| 2026-04-04 12:00 |
11:31:10.01 |
-11:28:53.0 |
HIP 56271 |
16.12 |
| 2026-04-05 00:00 |
11:30:57.91 |
-11:27:14.7 |
HIP 56271 |
18.27 |
| 2026-04-05 12:00 |
11:30:45.90 |
-11:25:36.3 |
HIP 56271 |
20.74 |
| 2026-04-06 00:00 |
11:30:33.96 |
-11:23:57.7 |
HIP 56271 |
23.41 |
| 2026-04-06 12:00 |
11:30:22.10 |
-11:22:18.9 |
HIP 56271 |
26.22 |
| 2026-04-07 00:00 |
11:30:10.33 |
-11:20:40.0 |
HIP 56271 |
29.13 |
| 2026-04-07 12:00 |
11:29:58.63 |
-11:19:00.9 |
HIP 56271 |
32.09 |
| 2026-04-08 00:00 |
11:29:47.02 |
-11:17:21.8 |
HIP 55942 |
30.68 |
| 2026-04-08 12:00 |
11:29:35.50 |
-11:15:42.5 |
HIP 55942 |
27.41 |
| 2026-04-09 00:00 |
11:29:24.06 |
-11:14:03.1 |
HIP 55942 |
24.16 |
| 2026-04-09 12:00 |
11:29:12.71 |
-11:12:23.7 |
HIP 55942 |
20.94 |
| 2026-04-10 00:00 |
11:29:01.46 |
-11:10:44.2 |
HIP 55942 |
17.75 |
| 2026-04-10 12:00 |
11:28:50.29 |
-11:09:04.7 |
HIP 55942 |
14.58 |
| 2026-04-11 00:00 |
11:28:39.22 |
-11:07:25.1 |
HIP 55942 |
11.45 |
| 2026-04-11 12:00 |
11:28:28.24 |
-11:05:45.5 |
HIP 55942 |
8.40 |
| 2026-04-12 00:00 |
11:28:17.36 |
-11:04:05.9 |
HIP 55942 |
5.48 |
| 2026-04-12 12:00 |
11:28:06.58 |
-11:02:26.3 |
HIP 55942 |
3.08 |
| 2026-04-13 00:00 |
11:27:55.89 |
-11:00:46.8 |
HIP 55942 |
2.90 |
| 2026-04-13 12:00 |
11:27:45.31 |
-10:59:07.3 |
HIP 55942 |
5.15 |
| 2026-04-14 00:00 |
11:27:34.83 |
-10:57:27.9 |
HIP 55942 |
7.96 |
| 2026-04-14 12:00 |
11:27:24.45 |
-10:55:48.5 |
HIP 55942 |
10.88 |
| 2026-04-15 00:00 |
11:27:14.18 |
-10:54:09.2 |
HIP 55942 |
13.84 |
| 2026-04-15 12:00 |
11:27:04.01 |
-10:52:30.0 |
HIP 55942 |
16.79 |
| 2026-04-16 00:00 |
11:26:53.96 |
-10:50:51.0 |
HIP 55942 |
19.74 |