P/2020 T3 (PANSTARRS)
| Parameter |
Value |
| Designation |
P/2020 T3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-20T11:20:03.816960Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:13:00Z |
| Obs used |
181 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
33.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-10-10T08:48:39.168000Z |
| Discovery magnitude (MPC) |
21.30 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-12-02.0000000 |
| e |
0.59149152 |
| q (au) |
1.436615 |
| a (au) |
3.516732 |
| i (deg) |
7.295760 |
| Ω (om, deg) |
74.020875 |
| ω (w, deg) |
357.042704 |
| M (ma, deg) |
352.606384 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.642 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.642 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2020-09-09 |
2021-01-18 |
+15.9275 |
-3.268 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
19:33:03.73 |
-24:59:46.7 |
HIP 96260 |
28.11 |
| 2026-02-03 12:00 |
19:33:35.36 |
-24:58:56.4 |
HIP 96333 |
23.21 |
| 2026-02-04 00:00 |
19:34:06.96 |
-24:58:05.9 |
HIP 96333 |
17.33 |
| 2026-02-04 12:00 |
19:34:38.53 |
-24:57:15.2 |
HIP 96333 |
12.87 |
| 2026-02-05 00:00 |
19:35:10.07 |
-24:56:24.4 |
HIP 96333 |
11.61 |
| 2026-02-05 12:00 |
19:35:41.58 |
-24:55:33.4 |
HIP 96406 |
13.22 |
| 2026-02-06 00:00 |
19:36:13.06 |
-24:54:42.3 |
HIP 96465 |
6.86 |
| 2026-02-06 12:00 |
19:36:44.51 |
-24:53:50.9 |
HIP 96465 |
0.96 |
| 2026-02-07 00:00 |
19:37:15.92 |
-24:52:59.4 |
HIP 96465 |
7.61 |
| 2026-02-07 12:00 |
19:37:47.30 |
-24:52:07.8 |
HIP 96465 |
14.75 |
| 2026-02-08 00:00 |
19:38:18.65 |
-24:51:15.9 |
HIP 96465 |
21.90 |
| 2026-02-08 12:00 |
19:38:49.97 |
-24:50:24.0 |
HIP 96707 |
18.42 |
| 2026-02-09 00:00 |
19:39:21.24 |
-24:49:31.9 |
HIP 96707 |
14.82 |
| 2026-02-09 12:00 |
19:39:52.48 |
-24:48:39.6 |
HIP 96707 |
14.23 |
| 2026-02-10 00:00 |
19:40:23.69 |
-24:47:47.2 |
HIP 96879 |
16.48 |
| 2026-02-10 12:00 |
19:40:54.85 |
-24:46:54.7 |
HIP 96879 |
9.81 |
| 2026-02-11 00:00 |
19:41:25.98 |
-24:46:02.0 |
HIP 96879 |
4.74 |
| 2026-02-11 12:00 |
19:41:57.07 |
-24:45:09.2 |
HIP 96879 |
7.07 |
| 2026-02-12 00:00 |
19:42:28.11 |
-24:44:16.3 |
HIP 96938 |
7.39 |
| 2026-02-12 12:00 |
19:42:59.12 |
-24:43:23.3 |
HIP 96938 |
11.63 |
| 2026-02-13 00:00 |
19:43:30.08 |
-24:42:30.1 |
HIP 96938 |
17.78 |
| 2026-02-13 12:00 |
19:44:01.00 |
-24:41:36.9 |
HIP 96938 |
24.44 |
| 2026-02-14 00:00 |
19:44:31.87 |
-24:40:43.5 |
HIP 97294 |
28.42 |
| 2026-02-14 12:00 |
19:45:02.70 |
-24:39:50.0 |
HIP 97294 |
22.76 |
| 2026-02-15 00:00 |
19:45:33.49 |
-24:38:56.5 |
HIP 97294 |
18.12 |
| 2026-02-15 12:00 |
19:46:04.22 |
-24:38:02.8 |
HIP 97294 |
15.43 |
| 2026-02-16 00:00 |
19:46:34.91 |
-24:37:09.1 |
HIP 97294 |
15.70 |
| 2026-02-16 12:00 |
19:47:05.56 |
-24:36:15.3 |
HIP 97424 |
16.78 |
| 2026-02-17 00:00 |
19:47:36.15 |
-24:35:21.4 |
HIP 97424 |
11.40 |
| 2026-02-17 12:00 |
19:48:06.69 |
-24:34:27.4 |
HIP 97424 |
8.77 |
| 2026-02-18 00:00 |
19:48:37.18 |
-24:33:33.3 |
HIP 97424 |
11.04 |
| 2026-02-18 12:00 |
19:49:07.62 |
-24:32:39.2 |
HIP 97424 |
16.26 |
| 2026-02-19 00:00 |
19:49:38.00 |
-24:31:45.1 |
HIP 97424 |
22.44 |
| 2026-02-19 12:00 |
19:50:08.33 |
-24:30:50.9 |
HIP 97770 |
26.84 |
| 2026-02-20 00:00 |
19:50:38.61 |
-24:29:56.6 |
HIP 97770 |
19.90 |
| 2026-02-20 12:00 |
19:51:08.83 |
-24:29:02.3 |
HIP 97770 |
12.98 |
| 2026-02-21 00:00 |
19:51:38.99 |
-24:28:08.0 |
HIP 97770 |
6.10 |
| 2026-02-21 12:00 |
19:52:09.10 |
-24:27:13.6 |
HIP 97770 |
1.38 |
| 2026-02-22 00:00 |
19:52:39.15 |
-24:26:19.2 |
HIP 97770 |
7.87 |
| 2026-02-22 12:00 |
19:53:09.14 |
-24:25:24.8 |
HIP 97770 |
14.72 |
| 2026-02-23 00:00 |
19:53:39.07 |
-24:24:30.4 |
HIP 97770 |
21.58 |
| 2026-02-23 12:00 |
19:54:08.93 |
-24:23:36.0 |
HIP 97944 |
27.27 |
| 2026-02-24 00:00 |
19:54:38.74 |
-24:22:41.5 |
HIP 97944 |
26.72 |