| Parameter |
Value |
| Designation |
C/2020 PV6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-09-25T23:59:11.313600Z |
| Orbit solution date (soln_date, UTC) |
2024-07-30T14:57:24Z |
| Obs used |
1749 |
| NEO |
- |
| M1 |
7.500 |
| K1 |
17.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-09-30.0000000 |
| e |
0.94495091 |
| q (au) |
2.295631 |
| a (au) |
41.701535 |
| i (deg) |
128.239287 |
| Ω (om, deg) |
329.143872 |
| ω (w, deg) |
71.380642 |
| M (ma, deg) |
0.014642 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.667 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.667 |
| 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 |
| 2021-05-30 |
2021-09-22 |
+4.0425 |
-1.521 |
| 2021-09-26 |
2022-05-23 |
+13.2958 |
-5.599 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
08:22:28.08 |
-00:37:52.1 |
HIP 41043 |
5.86 |
| 2026-05-12 12:00 |
08:22:29.61 |
-00:37:30.0 |
HIP 41043 |
5.41 |
| 2026-05-13 00:00 |
08:22:31.20 |
-00:37:08.3 |
HIP 41043 |
4.99 |
| 2026-05-13 12:00 |
08:22:32.87 |
-00:36:47.0 |
HIP 41043 |
4.60 |
| 2026-05-14 00:00 |
08:22:34.60 |
-00:36:26.1 |
HIP 41043 |
4.25 |
| 2026-05-14 12:00 |
08:22:36.39 |
-00:36:05.6 |
HIP 41043 |
3.95 |
| 2026-05-15 00:00 |
08:22:38.25 |
-00:35:45.5 |
HIP 41043 |
3.73 |
| 2026-05-15 12:00 |
08:22:40.18 |
-00:35:25.8 |
HIP 41043 |
3.60 |
| 2026-05-16 00:00 |
08:22:42.18 |
-00:35:06.4 |
HIP 41043 |
3.58 |
| 2026-05-16 12:00 |
08:22:44.23 |
-00:34:47.5 |
HIP 41043 |
3.67 |
| 2026-05-17 00:00 |
08:22:46.36 |
-00:34:29.0 |
HIP 41043 |
3.87 |
| 2026-05-17 12:00 |
08:22:48.54 |
-00:34:10.9 |
HIP 41043 |
4.17 |
| 2026-05-18 00:00 |
08:22:50.79 |
-00:33:53.2 |
HIP 41043 |
4.55 |
| 2026-05-18 12:00 |
08:22:53.11 |
-00:33:35.8 |
HIP 41043 |
5.01 |
| 2026-05-19 00:00 |
08:22:55.48 |
-00:33:18.9 |
HIP 41043 |
5.51 |
| 2026-05-19 12:00 |
08:22:57.92 |
-00:33:02.5 |
HIP 41043 |
6.07 |
| 2026-05-20 00:00 |
08:23:00.42 |
-00:32:46.4 |
HIP 41043 |
6.66 |
| 2026-05-20 12:00 |
08:23:02.99 |
-00:32:30.7 |
HIP 41043 |
7.28 |
| 2026-05-21 00:00 |
08:23:05.61 |
-00:32:15.4 |
HIP 41043 |
7.93 |
| 2026-05-21 12:00 |
08:23:08.29 |
-00:32:00.6 |
HIP 41043 |
8.60 |
| 2026-05-22 00:00 |
08:23:11.04 |
-00:31:46.1 |
HIP 41043 |
9.30 |
| 2026-05-22 12:00 |
08:23:13.84 |
-00:31:32.1 |
HIP 41043 |
10.01 |
| 2026-05-23 00:00 |
08:23:16.71 |
-00:31:18.5 |
HIP 41043 |
10.74 |
| 2026-05-23 12:00 |
08:23:19.63 |
-00:31:05.3 |
HIP 41043 |
11.49 |
| 2026-05-24 00:00 |
08:23:22.61 |
-00:30:52.5 |
HIP 41043 |
12.25 |
| 2026-05-24 12:00 |
08:23:25.65 |
-00:30:40.1 |
HIP 41043 |
13.03 |
| 2026-05-25 00:00 |
08:23:28.74 |
-00:30:28.1 |
HIP 41043 |
13.82 |
| 2026-05-25 12:00 |
08:23:31.89 |
-00:30:16.6 |
HIP 41043 |
14.63 |
| 2026-05-26 00:00 |
08:23:35.10 |
-00:30:05.4 |
HIP 41043 |
15.45 |
| 2026-05-26 12:00 |
08:23:38.37 |
-00:29:54.7 |
HIP 41043 |
16.28 |
| 2026-05-27 00:00 |
08:23:41.69 |
-00:29:44.4 |
HIP 41043 |
17.13 |
| 2026-05-27 12:00 |
08:23:45.07 |
-00:29:34.5 |
HIP 41043 |
17.99 |
| 2026-05-28 00:00 |
08:23:48.50 |
-00:29:25.0 |
HIP 41043 |
18.86 |
| 2026-05-28 12:00 |
08:23:51.98 |
-00:29:16.0 |
HIP 41043 |
19.74 |
| 2026-05-29 00:00 |
08:23:55.52 |
-00:29:07.3 |
HIP 41043 |
20.64 |
| 2026-05-29 12:00 |
08:23:59.12 |
-00:28:59.1 |
HIP 41043 |
21.55 |
| 2026-05-30 00:00 |
08:24:02.76 |
-00:28:51.3 |
HIP 41043 |
22.47 |
| 2026-05-30 12:00 |
08:24:06.46 |
-00:28:43.9 |
HIP 41230 |
22.90 |
| 2026-05-31 00:00 |
08:24:10.21 |
-00:28:36.9 |
HIP 41230 |
22.38 |
| 2026-05-31 12:00 |
08:24:14.01 |
-00:28:30.3 |
HIP 41230 |
21.89 |
| 2026-06-01 00:00 |
08:24:17.87 |
-00:28:24.2 |
HIP 41230 |
21.43 |
| 2026-06-01 12:00 |
08:24:21.77 |
-00:28:18.4 |
HIP 41230 |
21.01 |
| 2026-06-02 00:00 |
08:24:25.73 |
-00:28:13.1 |
HIP 41313 |
20.38 |