| Parameter |
Value |
| Designation |
P/2020 O3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-27T20:38:44.139840Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:22Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-07-28T12:07:34.118400Z |
| Discovery magnitude (MPC) |
21.08 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-08-19.0000000 |
| e |
0.10611991 |
| q (au) |
4.167207 |
| a (au) |
4.661931 |
| i (deg) |
8.442690 |
| Ω (om, deg) |
266.895744 |
| ω (w, deg) |
81.214576 |
| M (ma, deg) |
344.151234 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.241 + 2.001\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.241 |
| n |
2.001 |
| gf |
0.901 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
11:05:08.35 |
-05:23:18.7 |
HIP 54121 |
10.73 |
| 2026-03-26 12:00 |
11:04:54.32 |
-05:21:31.8 |
HIP 54121 |
7.47 |
| 2026-03-27 00:00 |
11:04:40.37 |
-05:19:44.9 |
HIP 54121 |
5.24 |
| 2026-03-27 12:00 |
11:04:26.53 |
-05:17:57.9 |
HIP 54121 |
5.44 |
| 2026-03-28 00:00 |
11:04:12.78 |
-05:16:10.8 |
HIP 54121 |
7.85 |
| 2026-03-28 12:00 |
11:03:59.13 |
-05:14:23.7 |
HIP 54072 |
8.68 |
| 2026-03-29 00:00 |
11:03:45.59 |
-05:12:36.6 |
HIP 54072 |
6.88 |
| 2026-03-29 12:00 |
11:03:32.16 |
-05:10:49.4 |
HIP 54072 |
6.93 |
| 2026-03-30 00:00 |
11:03:18.83 |
-05:09:02.3 |
HIP 54072 |
8.79 |
| 2026-03-30 12:00 |
11:03:05.61 |
-05:07:15.3 |
HIP 54014 |
9.67 |
| 2026-03-31 00:00 |
11:02:52.50 |
-05:05:28.3 |
HIP 54014 |
7.96 |
| 2026-03-31 12:00 |
11:02:39.51 |
-05:03:41.3 |
HIP 54014 |
7.78 |
| 2026-04-01 00:00 |
11:02:26.63 |
-05:01:54.5 |
HIP 54014 |
9.20 |
| 2026-04-01 12:00 |
11:02:13.87 |
-05:00:07.8 |
HIP 54014 |
11.62 |
| 2026-04-02 00:00 |
11:02:01.23 |
-04:58:21.2 |
HIP 54014 |
14.53 |
| 2026-04-02 12:00 |
11:01:48.71 |
-04:56:34.7 |
HIP 54014 |
17.67 |
| 2026-04-03 00:00 |
11:01:36.32 |
-04:54:48.4 |
HIP 54014 |
20.92 |
| 2026-04-03 12:00 |
11:01:24.04 |
-04:53:02.3 |
HIP 54014 |
24.23 |
| 2026-04-04 00:00 |
11:01:11.90 |
-04:51:16.4 |
HIP 54014 |
27.56 |
| 2026-04-04 12:00 |
11:00:59.89 |
-04:49:30.7 |
HIP 54014 |
30.90 |
| 2026-04-05 00:00 |
11:00:48.00 |
-04:47:45.2 |
HIP 53672 |
29.42 |
| 2026-04-05 12:00 |
11:00:36.25 |
-04:46:00.0 |
HIP 53672 |
26.17 |
| 2026-04-06 00:00 |
11:00:24.64 |
-04:44:15.0 |
HIP 53672 |
23.01 |
| 2026-04-06 12:00 |
11:00:13.15 |
-04:42:30.3 |
HIP 53672 |
19.95 |
| 2026-04-07 00:00 |
11:00:01.81 |
-04:40:45.9 |
HIP 53672 |
17.05 |
| 2026-04-07 12:00 |
10:59:50.61 |
-04:39:01.9 |
HIP 53672 |
14.35 |
| 2026-04-08 00:00 |
10:59:39.54 |
-04:37:18.2 |
HIP 53672 |
11.98 |
| 2026-04-08 12:00 |
10:59:28.62 |
-04:35:34.8 |
HIP 53672 |
10.15 |
| 2026-04-09 00:00 |
10:59:17.85 |
-04:33:51.8 |
HIP 53672 |
9.14 |
| 2026-04-09 12:00 |
10:59:07.22 |
-04:32:09.2 |
HIP 53672 |
9.20 |
| 2026-04-10 00:00 |
10:58:56.74 |
-04:30:26.9 |
HIP 53672 |
10.27 |
| 2026-04-10 12:00 |
10:58:46.40 |
-04:28:45.1 |
HIP 53672 |
12.06 |
| 2026-04-11 00:00 |
10:58:36.22 |
-04:27:03.7 |
HIP 53672 |
14.28 |
| 2026-04-11 12:00 |
10:58:26.19 |
-04:25:22.8 |
HIP 53672 |
16.74 |
| 2026-04-12 00:00 |
10:58:16.31 |
-04:23:42.4 |
HIP 53672 |
19.33 |
| 2026-04-12 12:00 |
10:58:06.59 |
-04:22:02.4 |
HIP 53672 |
21.99 |
| 2026-04-13 00:00 |
10:57:57.03 |
-04:20:22.9 |
HIP 53672 |
24.69 |
| 2026-04-13 12:00 |
10:57:47.62 |
-04:18:43.9 |
HIP 53672 |
27.40 |
| 2026-04-14 00:00 |
10:57:38.37 |
-04:17:05.5 |
HIP 53728 |
29.29 |
| 2026-04-14 12:00 |
10:57:29.29 |
-04:15:27.6 |
HIP 53728 |
31.27 |
| 2026-04-15 00:00 |
10:57:20.36 |
-04:13:50.3 |
HIP 53728 |
33.33 |
| 2026-04-15 12:00 |
10:57:11.60 |
-04:12:13.6 |
HIP 53728 |
35.44 |
| 2026-04-16 00:00 |
10:57:03.00 |
-04:10:37.4 |
HIP 53728 |
37.59 |