| Parameter |
Value |
| Designation |
432P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-08-31T00:49:17.221440Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:23Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
18.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2016-10-25T11:18:06.278400Z |
| Discovery magnitude (MPC) |
20.95 T |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-12-28.0000000 |
| e |
0.24254187 |
| q (au) |
2.300216 |
| a (au) |
3.036757 |
| i (deg) |
10.070047 |
| Ω (om, deg) |
239.214363 |
| ω (w, deg) |
105.379770 |
| M (ma, deg) |
314.176883 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.527 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.527 |
| n |
2.000 |
| gf |
0.897 |
| gb |
-0.836 |
| k |
0.992 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
19:52:36.67 |
-05:22:54.3 |
HIP 97820 |
10.21 |
| 2026-07-29 12:00 |
19:52:12.62 |
-05:23:11.5 |
HIP 97820 |
11.94 |
| 2026-07-30 00:00 |
19:51:48.67 |
-05:23:30.8 |
HIP 97820 |
15.85 |
| 2026-07-30 12:00 |
19:51:24.84 |
-05:23:52.3 |
HIP 97820 |
20.73 |
| 2026-07-31 00:00 |
19:51:01.14 |
-05:24:15.9 |
HIP 97820 |
26.01 |
| 2026-07-31 12:00 |
19:50:37.56 |
-05:24:41.5 |
HIP 97820 |
31.47 |
| 2026-08-01 00:00 |
19:50:14.13 |
-05:25:09.3 |
HIP 97820 |
37.02 |
| 2026-08-01 12:00 |
19:49:50.84 |
-05:25:39.1 |
HIP 97400 |
32.96 |
| 2026-08-02 00:00 |
19:49:27.70 |
-05:26:10.9 |
HIP 97400 |
27.87 |
| 2026-08-02 12:00 |
19:49:04.72 |
-05:26:44.7 |
HIP 97400 |
23.17 |
| 2026-08-03 00:00 |
19:48:41.91 |
-05:27:20.6 |
HIP 97400 |
19.10 |
| 2026-08-03 12:00 |
19:48:19.28 |
-05:27:58.4 |
HIP 97400 |
16.11 |
| 2026-08-04 00:00 |
19:47:56.83 |
-05:28:38.1 |
HIP 97400 |
14.83 |
| 2026-08-04 12:00 |
19:47:34.58 |
-05:29:19.8 |
HIP 97400 |
15.62 |
| 2026-08-05 00:00 |
19:47:12.52 |
-05:30:03.4 |
HIP 97400 |
18.19 |
| 2026-08-05 12:00 |
19:46:50.66 |
-05:30:48.8 |
HIP 97400 |
21.87 |
| 2026-08-06 00:00 |
19:46:29.02 |
-05:31:36.1 |
HIP 97400 |
26.18 |
| 2026-08-06 12:00 |
19:46:07.60 |
-05:32:25.2 |
HIP 97400 |
30.83 |
| 2026-08-07 00:00 |
19:45:46.40 |
-05:33:16.2 |
HIP 97400 |
35.65 |
| 2026-08-07 12:00 |
19:45:25.45 |
-05:34:08.9 |
HIP 97400 |
40.57 |
| 2026-08-08 00:00 |
19:45:04.73 |
-05:35:03.3 |
HIP 96960 |
37.61 |
| 2026-08-08 12:00 |
19:44:44.26 |
-05:35:59.5 |
HIP 96960 |
32.45 |
| 2026-08-09 00:00 |
19:44:24.05 |
-05:36:57.4 |
HIP 96960 |
27.36 |
| 2026-08-09 12:00 |
19:44:04.10 |
-05:37:56.9 |
HIP 96960 |
22.36 |
| 2026-08-10 00:00 |
19:43:44.42 |
-05:38:58.1 |
HIP 96960 |
17.45 |
| 2026-08-10 12:00 |
19:43:25.02 |
-05:40:00.8 |
HIP 96960 |
12.68 |
| 2026-08-11 00:00 |
19:43:05.90 |
-05:41:05.1 |
HIP 96960 |
8.20 |
| 2026-08-11 12:00 |
19:42:47.08 |
-05:42:11.0 |
HIP 96960 |
4.68 |
| 2026-08-12 00:00 |
19:42:28.55 |
-05:43:18.3 |
HIP 96960 |
4.77 |
| 2026-08-12 12:00 |
19:42:10.32 |
-05:44:27.1 |
HIP 96960 |
8.25 |
| 2026-08-13 00:00 |
19:41:52.41 |
-05:45:37.4 |
HIP 96960 |
12.48 |
| 2026-08-13 12:00 |
19:41:34.81 |
-05:46:49.0 |
HIP 96960 |
16.85 |
| 2026-08-14 00:00 |
19:41:17.53 |
-05:48:02.0 |
HIP 96960 |
21.23 |
| 2026-08-14 12:00 |
19:41:00.59 |
-05:49:16.4 |
HIP 96783 |
24.46 |
| 2026-08-15 00:00 |
19:40:43.97 |
-05:50:32.0 |
HIP 96714 |
20.96 |
| 2026-08-15 12:00 |
19:40:27.70 |
-05:51:48.9 |
HIP 96714 |
17.09 |
| 2026-08-16 00:00 |
19:40:11.77 |
-05:53:06.9 |
HIP 96714 |
13.48 |
| 2026-08-16 12:00 |
19:39:56.18 |
-05:54:26.2 |
HIP 96714 |
10.33 |
| 2026-08-17 00:00 |
19:39:40.96 |
-05:55:46.6 |
HIP 96714 |
8.06 |
| 2026-08-17 12:00 |
19:39:26.09 |
-05:57:08.2 |
HIP 96714 |
7.39 |
| 2026-08-18 00:00 |
19:39:11.58 |
-05:58:30.8 |
HIP 96714 |
8.60 |
| 2026-08-18 12:00 |
19:38:57.45 |
-05:59:54.4 |
HIP 96714 |
11.00 |
| 2026-08-19 00:00 |
19:38:43.68 |
-06:01:19.1 |
HIP 96714 |
13.93 |