455P/PANSTARRS
| Parameter |
Value |
| Designation |
455P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-07-23T16:02:18.502080Z |
| Orbit solution date (soln_date, UTC) |
2023-02-09T05:35:52Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
31.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2011-08-21T13:23:27.830400Z |
| Discovery magnitude (MPC) |
23.18 G |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-04-11.0000000 |
| e |
0.30420723 |
| q (au) |
2.195173 |
| a (au) |
3.154924 |
| i (deg) |
14.138047 |
| Ω (om, deg) |
146.211575 |
| ω (w, deg) |
237.939928 |
| M (ma, deg) |
341.766645 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 3.420\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
3.420 |
| gf |
0.923 |
| gb |
-0.830 |
| k |
0.981 |
| δ90 |
4.926 |
| 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) |
| 2026-02-03 00:00 |
14:55:08.96 |
-03:07:43.5 |
HIP 72990 |
30.25 |
| 2026-02-03 12:00 |
14:55:22.09 |
-03:06:45.6 |
HIP 72990 |
31.68 |
| 2026-02-04 00:00 |
14:55:35.02 |
-03:05:46.3 |
HIP 72990 |
33.41 |
| 2026-02-04 12:00 |
14:55:47.75 |
-03:04:45.6 |
HIP 72990 |
35.39 |
| 2026-02-05 00:00 |
14:56:00.28 |
-03:03:43.6 |
HIP 72990 |
37.55 |
| 2026-02-05 12:00 |
14:56:12.61 |
-03:02:40.2 |
HIP 72990 |
39.87 |
| 2026-02-06 00:00 |
14:56:24.74 |
-03:01:35.4 |
HIP 72990 |
42.30 |
| 2026-02-06 12:00 |
14:56:36.66 |
-03:00:29.3 |
HIP 73358 |
44.01 |
| 2026-02-07 00:00 |
14:56:48.38 |
-02:59:21.9 |
HIP 73358 |
41.37 |
| 2026-02-07 12:00 |
14:56:59.89 |
-02:58:13.0 |
HIP 73358 |
38.86 |
| 2026-02-08 00:00 |
14:57:11.18 |
-02:57:02.8 |
HIP 73358 |
36.50 |
| 2026-02-08 12:00 |
14:57:22.27 |
-02:55:51.3 |
HIP 73358 |
34.30 |
| 2026-02-09 00:00 |
14:57:33.15 |
-02:54:38.4 |
HIP 73358 |
32.29 |
| 2026-02-09 12:00 |
14:57:43.82 |
-02:53:24.1 |
HIP 73358 |
30.50 |
| 2026-02-10 00:00 |
14:57:54.27 |
-02:52:08.5 |
HIP 73358 |
28.95 |
| 2026-02-10 12:00 |
14:58:04.50 |
-02:50:51.5 |
HIP 73358 |
27.67 |
| 2026-02-11 00:00 |
14:58:14.52 |
-02:49:33.2 |
HIP 73358 |
26.70 |
| 2026-02-11 12:00 |
14:58:24.32 |
-02:48:13.5 |
HIP 73358 |
26.05 |
| 2026-02-12 00:00 |
14:58:33.91 |
-02:46:52.5 |
HIP 73358 |
25.73 |
| 2026-02-12 12:00 |
14:58:43.27 |
-02:45:30.1 |
HIP 73358 |
25.75 |
| 2026-02-13 00:00 |
14:58:52.41 |
-02:44:06.4 |
HIP 73358 |
26.10 |
| 2026-02-13 12:00 |
14:59:01.33 |
-02:42:41.3 |
HIP 73358 |
26.74 |
| 2026-02-14 00:00 |
14:59:10.02 |
-02:41:14.9 |
HIP 73358 |
27.66 |
| 2026-02-14 12:00 |
14:59:18.49 |
-02:39:47.2 |
HIP 73459 |
28.02 |
| 2026-02-15 00:00 |
14:59:26.73 |
-02:38:18.2 |
HIP 73459 |
27.47 |
| 2026-02-15 12:00 |
14:59:34.75 |
-02:36:47.8 |
HIP 73459 |
27.20 |
| 2026-02-16 00:00 |
14:59:42.53 |
-02:35:16.1 |
HIP 73497 |
26.28 |
| 2026-02-16 12:00 |
14:59:50.09 |
-02:33:43.1 |
HIP 73497 |
25.22 |
| 2026-02-17 00:00 |
14:59:57.42 |
-02:32:08.8 |
HIP 73497 |
24.42 |
| 2026-02-17 12:00 |
15:00:04.51 |
-02:30:33.1 |
HIP 73497 |
23.89 |
| 2026-02-18 00:00 |
15:00:11.37 |
-02:28:56.2 |
HIP 73497 |
23.66 |
| 2026-02-18 12:00 |
15:00:18.00 |
-02:27:18.0 |
HIP 73497 |
23.71 |
| 2026-02-19 00:00 |
15:00:24.39 |
-02:25:38.5 |
HIP 73497 |
24.03 |
| 2026-02-19 12:00 |
15:00:30.55 |
-02:23:57.7 |
HIP 73497 |
24.62 |
| 2026-02-20 00:00 |
15:00:36.47 |
-02:22:15.7 |
HIP 73497 |
25.45 |
| 2026-02-20 12:00 |
15:00:42.16 |
-02:20:32.3 |
HIP 73497 |
26.48 |
| 2026-02-21 00:00 |
15:00:47.60 |
-02:18:47.8 |
HIP 73570 |
26.96 |
| 2026-02-21 12:00 |
15:00:52.81 |
-02:17:01.9 |
HIP 73570 |
24.82 |
| 2026-02-22 00:00 |
15:00:57.78 |
-02:15:14.8 |
HIP 73570 |
22.71 |
| 2026-02-22 12:00 |
15:01:02.51 |
-02:13:26.5 |
HIP 73570 |
20.66 |
| 2026-02-23 00:00 |
15:01:07.00 |
-02:11:37.0 |
HIP 73570 |
18.66 |
| 2026-02-23 12:00 |
15:01:11.24 |
-02:09:46.2 |
HIP 73570 |
16.75 |
| 2026-02-24 00:00 |
15:01:15.25 |
-02:07:54.2 |
HIP 73570 |
14.93 |