| 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) |
| 2026-05-12 00:00 |
10:53:40.50 |
-03:05:49.2 |
HIP 53207 |
11.23 |
| 2026-05-12 12:00 |
10:53:41.44 |
-03:04:59.9 |
HIP 53207 |
11.28 |
| 2026-05-13 00:00 |
10:53:42.56 |
-03:04:11.6 |
HIP 53207 |
11.45 |
| 2026-05-13 12:00 |
10:53:43.87 |
-03:03:24.4 |
HIP 53207 |
11.73 |
| 2026-05-14 00:00 |
10:53:45.36 |
-03:02:38.3 |
HIP 53207 |
12.10 |
| 2026-05-14 12:00 |
10:53:47.03 |
-03:01:53.3 |
HIP 53207 |
12.57 |
| 2026-05-15 00:00 |
10:53:48.88 |
-03:01:09.4 |
HIP 53207 |
13.12 |
| 2026-05-15 12:00 |
10:53:50.91 |
-03:00:26.6 |
HIP 53207 |
13.74 |
| 2026-05-16 00:00 |
10:53:53.13 |
-02:59:44.9 |
HIP 53207 |
14.43 |
| 2026-05-16 12:00 |
10:53:55.53 |
-02:59:04.2 |
HIP 53207 |
15.17 |
| 2026-05-17 00:00 |
10:53:58.10 |
-02:58:24.7 |
HIP 53369 |
14.83 |
| 2026-05-17 12:00 |
10:54:00.86 |
-02:57:46.3 |
HIP 53369 |
13.91 |
| 2026-05-18 00:00 |
10:54:03.80 |
-02:57:09.0 |
HIP 53369 |
12.97 |
| 2026-05-18 12:00 |
10:54:06.92 |
-02:56:32.9 |
HIP 53369 |
11.99 |
| 2026-05-19 00:00 |
10:54:10.21 |
-02:55:57.8 |
HIP 53369 |
10.99 |
| 2026-05-19 12:00 |
10:54:13.69 |
-02:55:23.9 |
HIP 53369 |
9.96 |
| 2026-05-20 00:00 |
10:54:17.34 |
-02:54:51.1 |
HIP 53369 |
8.90 |
| 2026-05-20 12:00 |
10:54:21.17 |
-02:54:19.4 |
HIP 53369 |
7.81 |
| 2026-05-21 00:00 |
10:54:25.18 |
-02:53:48.9 |
HIP 53369 |
6.69 |
| 2026-05-21 12:00 |
10:54:29.36 |
-02:53:19.5 |
HIP 53369 |
5.53 |
| 2026-05-22 00:00 |
10:54:33.72 |
-02:52:51.2 |
HIP 53369 |
4.35 |
| 2026-05-22 12:00 |
10:54:38.25 |
-02:52:24.0 |
HIP 53369 |
3.14 |
| 2026-05-23 00:00 |
10:54:42.96 |
-02:51:58.0 |
HIP 53369 |
1.92 |
| 2026-05-23 12:00 |
10:54:47.84 |
-02:51:33.1 |
HIP 53369 |
0.79 |
| 2026-05-24 00:00 |
10:54:52.89 |
-02:51:09.3 |
HIP 53369 |
1.00 |
| 2026-05-24 12:00 |
10:54:58.12 |
-02:50:46.7 |
HIP 53369 |
2.25 |
| 2026-05-25 00:00 |
10:55:03.52 |
-02:50:25.1 |
HIP 53369 |
3.62 |
| 2026-05-25 12:00 |
10:55:09.08 |
-02:50:04.7 |
HIP 53369 |
5.04 |
| 2026-05-26 00:00 |
10:55:14.82 |
-02:49:45.5 |
HIP 53369 |
6.50 |
| 2026-05-26 12:00 |
10:55:20.72 |
-02:49:27.3 |
HIP 53369 |
8.01 |
| 2026-05-27 00:00 |
10:55:26.80 |
-02:49:10.3 |
HIP 53443 |
9.11 |
| 2026-05-27 12:00 |
10:55:33.04 |
-02:48:54.4 |
HIP 53443 |
7.93 |
| 2026-05-28 00:00 |
10:55:39.45 |
-02:48:39.7 |
HIP 53443 |
6.87 |
| 2026-05-28 12:00 |
10:55:46.02 |
-02:48:26.0 |
HIP 53443 |
6.03 |
| 2026-05-29 00:00 |
10:55:52.76 |
-02:48:13.5 |
HIP 53443 |
5.54 |
| 2026-05-29 12:00 |
10:55:59.66 |
-02:48:02.1 |
HIP 53443 |
5.53 |
| 2026-05-30 00:00 |
10:56:06.73 |
-02:47:51.8 |
HIP 53443 |
6.03 |
| 2026-05-30 12:00 |
10:56:13.96 |
-02:47:42.7 |
HIP 53443 |
6.97 |
| 2026-05-31 00:00 |
10:56:21.35 |
-02:47:34.6 |
HIP 53443 |
8.22 |
| 2026-05-31 12:00 |
10:56:28.91 |
-02:47:27.7 |
HIP 53443 |
9.69 |
| 2026-06-01 00:00 |
10:56:36.62 |
-02:47:21.9 |
HIP 53443 |
11.30 |
| 2026-06-01 12:00 |
10:56:44.50 |
-02:47:17.2 |
HIP 53443 |
13.03 |
| 2026-06-02 00:00 |
10:56:52.53 |
-02:47:13.7 |
HIP 53443 |
14.84 |