| 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
$$
M_a = (18.526 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.526 |
| n |
2.000 |
| gf |
0.901 |
| 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) |
| 2026-05-12 00:00 |
20:13:16.30 |
-11:20:50.4 |
HIP 99795 |
29.05 |
| 2026-05-12 12:00 |
20:13:34.10 |
-11:17:05.4 |
HIP 99795 |
28.35 |
| 2026-05-13 00:00 |
20:13:51.59 |
-11:13:20.5 |
HIP 99790 |
24.33 |
| 2026-05-13 12:00 |
20:14:08.76 |
-11:09:35.8 |
HIP 99790 |
18.89 |
| 2026-05-14 00:00 |
20:14:25.62 |
-11:05:51.4 |
HIP 99790 |
13.65 |
| 2026-05-14 12:00 |
20:14:42.15 |
-11:02:07.1 |
HIP 99790 |
8.84 |
| 2026-05-15 00:00 |
20:14:58.37 |
-10:58:23.1 |
HIP 99790 |
5.53 |
| 2026-05-15 12:00 |
20:15:14.26 |
-10:54:39.3 |
HIP 99790 |
6.45 |
| 2026-05-16 00:00 |
20:15:29.83 |
-10:50:55.8 |
HIP 99790 |
10.45 |
| 2026-05-16 12:00 |
20:15:45.07 |
-10:47:12.5 |
HIP 99790 |
15.22 |
| 2026-05-17 00:00 |
20:15:59.99 |
-10:43:29.6 |
HIP 99790 |
20.17 |
| 2026-05-17 12:00 |
20:16:14.57 |
-10:39:47.0 |
HIP 99971 |
21.62 |
| 2026-05-18 00:00 |
20:16:28.83 |
-10:36:04.7 |
HIP 100065 |
23.21 |
| 2026-05-18 12:00 |
20:16:42.75 |
-10:32:22.7 |
HIP 100065 |
20.09 |
| 2026-05-19 00:00 |
20:16:56.34 |
-10:28:41.2 |
HIP 100065 |
17.95 |
| 2026-05-19 12:00 |
20:17:09.59 |
-10:25:00.0 |
HIP 100065 |
17.08 |
| 2026-05-20 00:00 |
20:17:22.50 |
-10:21:19.2 |
HIP 100065 |
17.65 |
| 2026-05-20 12:00 |
20:17:35.08 |
-10:17:38.8 |
HIP 100065 |
19.48 |
| 2026-05-21 00:00 |
20:17:47.31 |
-10:13:58.9 |
HIP 100065 |
22.22 |
| 2026-05-21 12:00 |
20:17:59.21 |
-10:10:19.4 |
HIP 100138 |
20.97 |
| 2026-05-22 00:00 |
20:18:10.76 |
-10:06:40.4 |
HIP 100138 |
16.36 |
| 2026-05-22 12:00 |
20:18:21.97 |
-10:03:01.8 |
HIP 100138 |
11.80 |
| 2026-05-23 00:00 |
20:18:32.84 |
-09:59:23.8 |
HIP 100138 |
7.30 |
| 2026-05-23 12:00 |
20:18:43.36 |
-09:55:46.2 |
HIP 100138 |
2.88 |
| 2026-05-24 00:00 |
20:18:53.53 |
-09:52:09.2 |
HIP 100138 |
1.67 |
| 2026-05-24 12:00 |
20:19:03.35 |
-09:48:32.8 |
HIP 100138 |
5.94 |
| 2026-05-25 00:00 |
20:19:12.82 |
-09:44:56.9 |
HIP 100138 |
10.21 |
| 2026-05-25 12:00 |
20:19:21.94 |
-09:41:21.6 |
HIP 100138 |
14.44 |
| 2026-05-26 00:00 |
20:19:30.71 |
-09:37:46.9 |
HIP 100138 |
18.61 |
| 2026-05-26 12:00 |
20:19:39.13 |
-09:34:12.8 |
HIP 100138 |
22.73 |
| 2026-05-27 00:00 |
20:19:47.19 |
-09:30:39.3 |
HIP 100138 |
26.79 |
| 2026-05-27 12:00 |
20:19:54.89 |
-09:27:06.5 |
HIP 100138 |
30.80 |
| 2026-05-28 00:00 |
20:20:02.24 |
-09:23:34.4 |
HIP 100138 |
34.76 |
| 2026-05-28 12:00 |
20:20:09.22 |
-09:20:03.0 |
HIP 100138 |
38.67 |
| 2026-05-29 00:00 |
20:20:15.85 |
-09:16:32.2 |
HIP 100482 |
37.79 |
| 2026-05-29 12:00 |
20:20:22.11 |
-09:13:02.2 |
HIP 100482 |
35.03 |
| 2026-05-30 00:00 |
20:20:28.01 |
-09:09:32.9 |
HIP 100482 |
32.57 |
| 2026-05-30 12:00 |
20:20:33.55 |
-09:06:04.4 |
HIP 100482 |
30.48 |
| 2026-05-31 00:00 |
20:20:38.72 |
-09:02:36.7 |
HIP 100482 |
28.81 |
| 2026-05-31 12:00 |
20:20:43.52 |
-08:59:09.8 |
HIP 100482 |
27.62 |
| 2026-06-01 00:00 |
20:20:47.95 |
-08:55:43.7 |
HIP 100482 |
26.97 |
| 2026-06-01 12:00 |
20:20:52.02 |
-08:52:18.5 |
HIP 100481 |
25.59 |
| 2026-06-02 00:00 |
20:20:55.71 |
-08:48:54.1 |
HIP 100481 |
24.53 |