| Parameter |
Value |
| Designation |
454P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-25T10:55:32.796480Z |
| Orbit solution date (soln_date, UTC) |
2023-02-13T23:14:25Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
12.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2013-11-27T13:53:06.720000Z |
| Discovery magnitude (MPC) |
21.40 r |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-08-02.0000000 |
| e |
0.36154433 |
| q (au) |
2.686682 |
| a (au) |
4.208095 |
| i (deg) |
19.806089 |
| Ω (om, deg) |
54.608515 |
| ω (w, deg) |
19.834027 |
| M (ma, deg) |
319.187103 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.082 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.082 |
| n |
6.000 |
| gf |
0.982 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
6.502 |
| 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 |
16:12:21.80 |
-24:53:23.3 |
HIP 79301 |
22.70 |
| 2026-05-12 12:00 |
16:12:03.69 |
-24:53:27.5 |
HIP 79301 |
19.54 |
| 2026-05-13 00:00 |
16:11:45.51 |
-24:53:31.2 |
HIP 79268 |
15.80 |
| 2026-05-13 12:00 |
16:11:27.27 |
-24:53:34.4 |
HIP 79268 |
11.91 |
| 2026-05-14 00:00 |
16:11:08.96 |
-24:53:37.2 |
HIP 79268 |
8.27 |
| 2026-05-14 12:00 |
16:10:50.59 |
-24:53:39.4 |
HIP 79268 |
5.43 |
| 2026-05-15 00:00 |
16:10:32.16 |
-24:53:41.3 |
HIP 79268 |
5.03 |
| 2026-05-15 12:00 |
16:10:13.68 |
-24:53:42.6 |
HIP 79268 |
7.49 |
| 2026-05-16 00:00 |
16:09:55.15 |
-24:53:43.5 |
HIP 79268 |
11.07 |
| 2026-05-16 12:00 |
16:09:36.57 |
-24:53:44.0 |
HIP 79268 |
14.98 |
| 2026-05-17 00:00 |
16:09:17.94 |
-24:53:44.0 |
HIP 79064 |
18.99 |
| 2026-05-17 12:00 |
16:08:59.27 |
-24:53:43.5 |
HIP 79064 |
16.41 |
| 2026-05-18 00:00 |
16:08:40.56 |
-24:53:42.6 |
HIP 79064 |
14.62 |
| 2026-05-18 12:00 |
16:08:21.81 |
-24:53:41.3 |
HIP 79064 |
13.94 |
| 2026-05-19 00:00 |
16:08:03.03 |
-24:53:39.6 |
HIP 79064 |
14.54 |
| 2026-05-19 12:00 |
16:07:44.22 |
-24:53:37.4 |
HIP 79064 |
16.27 |
| 2026-05-20 00:00 |
16:07:25.38 |
-24:53:34.8 |
HIP 78904 |
13.77 |
| 2026-05-20 12:00 |
16:07:06.51 |
-24:53:31.8 |
HIP 78904 |
9.62 |
| 2026-05-21 00:00 |
16:06:47.63 |
-24:53:28.3 |
HIP 78904 |
5.65 |
| 2026-05-21 12:00 |
16:06:28.72 |
-24:53:24.5 |
HIP 78904 |
2.86 |
| 2026-05-22 00:00 |
16:06:09.81 |
-24:53:20.2 |
HIP 78904 |
4.60 |
| 2026-05-22 12:00 |
16:05:50.87 |
-24:53:15.6 |
HIP 78904 |
8.43 |
| 2026-05-23 00:00 |
16:05:31.93 |
-24:53:10.5 |
HIP 78904 |
12.57 |
| 2026-05-23 12:00 |
16:05:12.98 |
-24:53:05.1 |
HIP 78904 |
16.79 |
| 2026-05-24 00:00 |
16:04:54.03 |
-24:52:59.3 |
HIP 78699 |
16.42 |
| 2026-05-24 12:00 |
16:04:35.07 |
-24:52:53.1 |
HIP 78699 |
13.06 |
| 2026-05-25 00:00 |
16:04:16.12 |
-24:52:46.5 |
HIP 78699 |
10.40 |
| 2026-05-25 12:00 |
16:03:57.17 |
-24:52:39.5 |
HIP 78699 |
9.10 |
| 2026-05-26 00:00 |
16:03:38.23 |
-24:52:32.2 |
HIP 78699 |
9.71 |
| 2026-05-26 12:00 |
16:03:19.30 |
-24:52:24.6 |
HIP 78602 |
10.48 |
| 2026-05-27 00:00 |
16:03:00.38 |
-24:52:16.5 |
HIP 78602 |
8.79 |
| 2026-05-27 12:00 |
16:02:41.48 |
-24:52:08.2 |
HIP 78602 |
9.04 |
| 2026-05-28 00:00 |
16:02:22.60 |
-24:51:59.5 |
HIP 78602 |
11.08 |
| 2026-05-28 12:00 |
16:02:03.73 |
-24:51:50.4 |
HIP 78602 |
14.17 |
| 2026-05-29 00:00 |
16:01:44.90 |
-24:51:41.1 |
HIP 78602 |
17.75 |
| 2026-05-29 12:00 |
16:01:26.08 |
-24:51:31.4 |
HIP 78494 |
20.38 |
| 2026-05-30 00:00 |
16:01:07.30 |
-24:51:21.4 |
HIP 78494 |
21.01 |
| 2026-05-30 12:00 |
16:00:48.55 |
-24:51:11.0 |
HIP 78494 |
22.45 |
| 2026-05-31 00:00 |
16:00:29.83 |
-24:51:00.4 |
HIP 78494 |
24.54 |
| 2026-05-31 12:00 |
16:00:11.15 |
-24:50:49.5 |
HIP 78246 |
21.86 |
| 2026-06-01 00:00 |
15:59:52.51 |
-24:50:38.3 |
HIP 78246 |
17.63 |
| 2026-06-01 12:00 |
15:59:33.91 |
-24:50:26.8 |
HIP 78246 |
13.41 |
| 2026-06-02 00:00 |
15:59:15.36 |
-24:50:15.0 |
HIP 78246 |
9.19 |