| 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 |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
6.514 |
| 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) |
| 2026-07-29 00:00 |
15:37:39.02 |
-24:31:34.5 |
HIP 76578 |
12.48 |
| 2026-07-29 12:00 |
15:37:37.60 |
-24:31:42.3 |
HIP 76578 |
12.65 |
| 2026-07-30 00:00 |
15:37:36.38 |
-24:31:50.6 |
HIP 76578 |
12.80 |
| 2026-07-30 12:00 |
15:37:35.34 |
-24:31:59.4 |
HIP 76578 |
12.91 |
| 2026-07-31 00:00 |
15:37:34.49 |
-24:32:08.7 |
HIP 76578 |
12.98 |
| 2026-07-31 12:00 |
15:37:33.83 |
-24:32:18.4 |
HIP 76578 |
13.02 |
| 2026-08-01 00:00 |
15:37:33.35 |
-24:32:28.7 |
HIP 76578 |
13.02 |
| 2026-08-01 12:00 |
15:37:33.07 |
-24:32:39.5 |
HIP 76578 |
12.98 |
| 2026-08-02 00:00 |
15:37:32.97 |
-24:32:50.7 |
HIP 76578 |
12.90 |
| 2026-08-02 12:00 |
15:37:33.06 |
-24:33:02.5 |
HIP 76578 |
12.79 |
| 2026-08-03 00:00 |
15:37:33.34 |
-24:33:14.7 |
HIP 76578 |
12.63 |
| 2026-08-03 12:00 |
15:37:33.81 |
-24:33:27.5 |
HIP 76578 |
12.44 |
| 2026-08-04 00:00 |
15:37:34.46 |
-24:33:40.8 |
HIP 76578 |
12.20 |
| 2026-08-04 12:00 |
15:37:35.30 |
-24:33:54.6 |
HIP 76578 |
11.93 |
| 2026-08-05 00:00 |
15:37:36.33 |
-24:34:08.8 |
HIP 76578 |
11.61 |
| 2026-08-05 12:00 |
15:37:37.54 |
-24:34:23.6 |
HIP 76578 |
11.26 |
| 2026-08-06 00:00 |
15:37:38.94 |
-24:34:38.9 |
HIP 76578 |
10.86 |
| 2026-08-06 12:00 |
15:37:40.52 |
-24:34:54.7 |
HIP 76578 |
10.42 |
| 2026-08-07 00:00 |
15:37:42.29 |
-24:35:11.1 |
HIP 76578 |
9.94 |
| 2026-08-07 12:00 |
15:37:44.25 |
-24:35:27.9 |
HIP 76578 |
9.42 |
| 2026-08-08 00:00 |
15:37:46.39 |
-24:35:45.2 |
HIP 76578 |
8.86 |
| 2026-08-08 12:00 |
15:37:48.71 |
-24:36:03.1 |
HIP 76578 |
8.26 |
| 2026-08-09 00:00 |
15:37:51.22 |
-24:36:21.5 |
HIP 76578 |
7.61 |
| 2026-08-09 12:00 |
15:37:53.91 |
-24:36:40.4 |
HIP 76578 |
6.93 |
| 2026-08-10 00:00 |
15:37:56.79 |
-24:36:59.8 |
HIP 76578 |
6.20 |
| 2026-08-10 12:00 |
15:37:59.85 |
-24:37:19.7 |
HIP 76578 |
5.43 |
| 2026-08-11 00:00 |
15:38:03.09 |
-24:37:40.1 |
HIP 76578 |
4.62 |
| 2026-08-11 12:00 |
15:38:06.52 |
-24:38:01.1 |
HIP 76578 |
3.77 |
| 2026-08-12 00:00 |
15:38:10.12 |
-24:38:22.5 |
HIP 76578 |
2.88 |
| 2026-08-12 12:00 |
15:38:13.91 |
-24:38:44.5 |
HIP 76578 |
1.95 |
| 2026-08-13 00:00 |
15:38:17.88 |
-24:39:07.0 |
HIP 76578 |
0.98 |
| 2026-08-13 12:00 |
15:38:22.03 |
-24:39:30.0 |
HIP 76578 |
0.21 |
| 2026-08-14 00:00 |
15:38:26.36 |
-24:39:53.5 |
HIP 76578 |
1.13 |
| 2026-08-14 12:00 |
15:38:30.87 |
-24:40:17.6 |
HIP 76578 |
2.22 |
| 2026-08-15 00:00 |
15:38:35.56 |
-24:40:42.1 |
HIP 76578 |
3.36 |
| 2026-08-15 12:00 |
15:38:40.43 |
-24:41:07.2 |
HIP 76578 |
4.54 |
| 2026-08-16 00:00 |
15:38:45.47 |
-24:41:32.7 |
HIP 76578 |
5.76 |
| 2026-08-16 12:00 |
15:38:50.69 |
-24:41:58.8 |
HIP 76578 |
7.02 |
| 2026-08-17 00:00 |
15:38:56.09 |
-24:42:25.4 |
HIP 76578 |
8.32 |
| 2026-08-17 12:00 |
15:39:01.66 |
-24:42:52.5 |
HIP 76578 |
9.67 |
| 2026-08-18 00:00 |
15:39:07.41 |
-24:43:20.1 |
HIP 76578 |
11.05 |
| 2026-08-18 12:00 |
15:39:13.33 |
-24:43:48.2 |
HIP 76578 |
12.47 |
| 2026-08-19 00:00 |
15:39:19.42 |
-24:44:16.8 |
HIP 76578 |
13.93 |