| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
10:57:00.73 |
-02:47:11.2 |
HIP 53443 |
16.73 |
| 2026-06-03 00:00 |
10:57:09.08 |
-02:47:09.8 |
HIP 53443 |
18.69 |
| 2026-06-03 12:00 |
10:57:17.59 |
-02:47:09.6 |
HIP 53443 |
20.70 |
| 2026-06-04 00:00 |
10:57:26.25 |
-02:47:10.5 |
HIP 53443 |
22.76 |
| 2026-06-04 12:00 |
10:57:35.08 |
-02:47:12.5 |
HIP 53443 |
24.87 |
| 2026-06-05 00:00 |
10:57:44.05 |
-02:47:15.5 |
HIP 53443 |
27.03 |
| 2026-06-05 12:00 |
10:57:53.18 |
-02:47:19.7 |
HIP 53443 |
29.24 |
| 2026-06-06 00:00 |
10:58:02.47 |
-02:47:25.0 |
HIP 53443 |
31.49 |
| 2026-06-06 12:00 |
10:58:11.91 |
-02:47:31.4 |
HIP 53443 |
33.79 |
| 2026-06-07 00:00 |
10:58:21.50 |
-02:47:38.9 |
HIP 53668 |
34.23 |
| 2026-06-07 12:00 |
10:58:31.24 |
-02:47:47.6 |
HIP 53668 |
33.95 |
| 2026-06-08 00:00 |
10:58:41.14 |
-02:47:57.3 |
HIP 53668 |
33.86 |
| 2026-06-08 12:00 |
10:58:51.18 |
-02:48:08.1 |
HIP 53668 |
33.97 |
| 2026-06-09 00:00 |
10:59:01.38 |
-02:48:20.0 |
HIP 53668 |
34.28 |
| 2026-06-09 12:00 |
10:59:11.72 |
-02:48:33.0 |
HIP 53668 |
34.80 |
| 2026-06-10 00:00 |
10:59:22.21 |
-02:48:47.1 |
HIP 53668 |
35.53 |
| 2026-06-10 12:00 |
10:59:32.85 |
-02:49:02.3 |
HIP 53875 |
34.23 |
| 2026-06-11 00:00 |
10:59:43.64 |
-02:49:18.5 |
HIP 53875 |
32.35 |
| 2026-06-11 12:00 |
10:59:54.57 |
-02:49:35.9 |
HIP 53875 |
30.57 |
| 2026-06-12 00:00 |
11:00:05.65 |
-02:49:54.4 |
HIP 53875 |
28.94 |
| 2026-06-12 12:00 |
11:00:16.87 |
-02:50:13.9 |
HIP 53875 |
27.49 |
| 2026-06-13 00:00 |
11:00:28.24 |
-02:50:34.6 |
HIP 53875 |
26.26 |
| 2026-06-13 12:00 |
11:00:39.75 |
-02:50:56.3 |
HIP 53875 |
25.30 |
| 2026-06-14 00:00 |
11:00:51.40 |
-02:51:19.1 |
HIP 53875 |
24.65 |
| 2026-06-14 12:00 |
11:01:03.19 |
-02:51:43.0 |
HIP 53875 |
24.35 |
| 2026-06-15 00:00 |
11:01:15.13 |
-02:52:08.0 |
HIP 53875 |
24.43 |
| 2026-06-15 12:00 |
11:01:27.21 |
-02:52:34.0 |
HIP 53907 |
24.16 |
| 2026-06-16 00:00 |
11:01:39.42 |
-02:53:01.1 |
HIP 53907 |
24.09 |
| 2026-06-16 12:00 |
11:01:51.78 |
-02:53:29.3 |
HIP 54013 |
22.57 |
| 2026-06-17 00:00 |
11:02:04.27 |
-02:53:58.6 |
HIP 54013 |
20.76 |
| 2026-06-17 12:00 |
11:02:16.90 |
-02:54:28.9 |
HIP 54013 |
19.31 |
| 2026-06-18 00:00 |
11:02:29.66 |
-02:55:00.3 |
HIP 54013 |
18.30 |
| 2026-06-18 12:00 |
11:02:42.56 |
-02:55:32.7 |
HIP 54013 |
17.84 |
| 2026-06-19 00:00 |
11:02:55.59 |
-02:56:06.2 |
HIP 54013 |
17.99 |
| 2026-06-19 12:00 |
11:03:08.76 |
-02:56:40.7 |
HIP 54013 |
18.75 |
| 2026-06-20 00:00 |
11:03:22.06 |
-02:57:16.3 |
HIP 54156 |
20.06 |
| 2026-06-20 12:00 |
11:03:35.49 |
-02:57:52.9 |
HIP 54156 |
16.69 |
| 2026-06-21 00:00 |
11:03:49.05 |
-02:58:30.6 |
HIP 54156 |
13.30 |
| 2026-06-21 12:00 |
11:04:02.74 |
-02:59:09.3 |
HIP 54156 |
9.91 |
| 2026-06-22 00:00 |
11:04:16.55 |
-02:59:49.0 |
HIP 54156 |
6.60 |