| Parameter |
Value |
| Designation |
456P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-04T09:54:13.236480Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:18Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
15.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2012-08-18T12:00:39.830400Z |
| Discovery magnitude (MPC) |
23.40 r |
| Discovery observatory (MPC) |
T14 · Canada-France-Hawaii Telescope, Maunakea |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-07-18.0000000 |
| e |
0.11870899 |
| q (au) |
2.789385 |
| a (au) |
3.165113 |
| i (deg) |
16.961610 |
| Ω (om, deg) |
243.224773 |
| ω (w, deg) |
234.671332 |
| M (ma, deg) |
119.475406 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.598 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.598 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
11:51:17.98 |
-16:40:11.7 |
HIP 57660 |
26.05 |
| 2026-05-12 12:00 |
11:51:18.09 |
-16:36:14.6 |
HIP 57660 |
25.80 |
| 2026-05-13 00:00 |
11:51:18.52 |
-16:32:19.3 |
HIP 57660 |
26.21 |
| 2026-05-13 12:00 |
11:51:19.26 |
-16:28:25.9 |
HIP 57660 |
27.26 |
| 2026-05-14 00:00 |
11:51:20.33 |
-16:24:34.4 |
HIP 57660 |
28.85 |
| 2026-05-14 12:00 |
11:51:21.72 |
-16:20:44.8 |
HIP 57660 |
30.90 |
| 2026-05-15 00:00 |
11:51:23.42 |
-16:16:57.2 |
HIP 57732 |
29.44 |
| 2026-05-15 12:00 |
11:51:25.45 |
-16:13:11.5 |
HIP 57732 |
26.59 |
| 2026-05-16 00:00 |
11:51:27.78 |
-16:09:27.9 |
HIP 57732 |
24.08 |
| 2026-05-16 12:00 |
11:51:30.44 |
-16:05:46.2 |
HIP 57732 |
22.01 |
| 2026-05-17 00:00 |
11:51:33.41 |
-16:02:06.6 |
HIP 57732 |
20.51 |
| 2026-05-17 12:00 |
11:51:36.70 |
-15:58:29.1 |
HIP 57732 |
19.70 |
| 2026-05-18 00:00 |
11:51:40.30 |
-15:54:53.7 |
HIP 57732 |
19.64 |
| 2026-05-18 12:00 |
11:51:44.21 |
-15:51:20.3 |
HIP 57732 |
20.35 |
| 2026-05-19 00:00 |
11:51:48.44 |
-15:47:49.1 |
HIP 57955 |
21.57 |
| 2026-05-19 12:00 |
11:51:52.97 |
-15:44:20.0 |
HIP 57955 |
19.57 |
| 2026-05-20 00:00 |
11:51:57.82 |
-15:40:53.1 |
HIP 57955 |
18.01 |
| 2026-05-20 12:00 |
11:52:02.97 |
-15:37:28.4 |
HIP 57955 |
17.03 |
| 2026-05-21 00:00 |
11:52:08.43 |
-15:34:05.8 |
HIP 57955 |
16.70 |
| 2026-05-21 12:00 |
11:52:14.20 |
-15:30:45.5 |
HIP 57955 |
17.07 |
| 2026-05-22 00:00 |
11:52:20.27 |
-15:27:27.4 |
HIP 57955 |
18.09 |
| 2026-05-22 12:00 |
11:52:26.65 |
-15:24:11.4 |
HIP 57955 |
19.65 |
| 2026-05-23 00:00 |
11:52:33.32 |
-15:20:57.8 |
HIP 57955 |
21.64 |
| 2026-05-23 12:00 |
11:52:40.30 |
-15:17:46.3 |
HIP 57991 |
23.59 |
| 2026-05-24 00:00 |
11:52:47.57 |
-15:14:37.1 |
HIP 57919 |
24.11 |
| 2026-05-24 12:00 |
11:52:55.14 |
-15:11:30.2 |
HIP 57919 |
21.11 |
| 2026-05-25 00:00 |
11:53:03.01 |
-15:08:25.5 |
HIP 57919 |
18.38 |
| 2026-05-25 12:00 |
11:53:11.16 |
-15:05:23.2 |
HIP 57919 |
16.07 |
| 2026-05-26 00:00 |
11:53:19.61 |
-15:02:23.1 |
HIP 57919 |
14.39 |
| 2026-05-26 12:00 |
11:53:28.35 |
-14:59:25.2 |
HIP 57919 |
13.58 |
| 2026-05-27 00:00 |
11:53:37.38 |
-14:56:29.7 |
HIP 57919 |
13.80 |
| 2026-05-27 12:00 |
11:53:46.70 |
-14:53:36.5 |
HIP 57919 |
15.01 |
| 2026-05-28 00:00 |
11:53:56.30 |
-14:50:45.5 |
HIP 57919 |
17.01 |
| 2026-05-28 12:00 |
11:54:06.18 |
-14:47:56.9 |
HIP 57962 |
16.71 |
| 2026-05-29 00:00 |
11:54:16.34 |
-14:45:10.5 |
HIP 57962 |
16.78 |
| 2026-05-29 12:00 |
11:54:26.79 |
-14:42:26.5 |
HIP 57962 |
17.71 |
| 2026-05-30 00:00 |
11:54:37.51 |
-14:39:44.8 |
HIP 57962 |
19.41 |
| 2026-05-30 12:00 |
11:54:48.50 |
-14:37:05.4 |
HIP 57962 |
21.70 |
| 2026-05-31 00:00 |
11:54:59.78 |
-14:34:28.3 |
HIP 57962 |
24.42 |
| 2026-05-31 12:00 |
11:55:11.32 |
-14:31:53.5 |
HIP 57962 |
27.45 |
| 2026-06-01 00:00 |
11:55:23.14 |
-14:29:21.0 |
HIP 58084 |
29.45 |
| 2026-06-01 12:00 |
11:55:35.23 |
-14:26:50.8 |
HIP 58084 |
28.24 |
| 2026-06-02 00:00 |
11:55:47.58 |
-14:24:23.0 |
HIP 58084 |
27.58 |