| Parameter |
Value |
| Designation |
441P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-09-08T06:41:27.507840Z |
| Orbit solution date (soln_date, UTC) |
2026-09-04T08:42:17Z |
| Obs used |
249 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-25T12:16:34.464000Z |
| Discovery magnitude (MPC) |
22.11 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-08-01.0000000 |
| e |
0.19555168 |
| q (au) |
3.326149 |
| a (au) |
4.134696 |
| i (deg) |
2.574152 |
| Ω (om, deg) |
143.612319 |
| ω (w, deg) |
178.766250 |
| M (ma, deg) |
227.028527 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.395 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.395 |
| n |
2.000 |
| gf |
0.993 |
| gb |
-0.786 |
| k |
0.966 |
| δ90 |
9.999 |
| 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) |
| 2026-09-20 00:00 |
02:13:42.78 |
+10:18:58.2 |
HIP 10288 |
17.92 |
| 2026-09-20 12:00 |
02:13:32.25 |
+10:17:38.8 |
HIP 10288 |
15.46 |
| 2026-09-21 00:00 |
02:13:21.48 |
+10:16:18.4 |
HIP 10288 |
13.12 |
| 2026-09-21 12:00 |
02:13:10.49 |
+10:14:56.9 |
HIP 10288 |
11.05 |
| 2026-09-22 00:00 |
02:12:59.26 |
+10:13:34.3 |
HIP 10288 |
9.48 |
| 2026-09-22 12:00 |
02:12:47.80 |
+10:12:10.7 |
HIP 10288 |
8.73 |
| 2026-09-23 00:00 |
02:12:36.12 |
+10:10:46.1 |
HIP 10288 |
9.09 |
| 2026-09-23 12:00 |
02:12:24.21 |
+10:09:20.5 |
HIP 10288 |
10.49 |
| 2026-09-24 00:00 |
02:12:12.09 |
+10:07:53.8 |
HIP 10288 |
12.63 |
| 2026-09-24 12:00 |
02:11:59.74 |
+10:06:26.2 |
HIP 10288 |
15.24 |
| 2026-09-25 00:00 |
02:11:47.18 |
+10:04:57.5 |
HIP 10288 |
18.14 |
| 2026-09-25 12:00 |
02:11:34.40 |
+10:03:27.9 |
HIP 10288 |
21.25 |
| 2026-09-26 00:00 |
02:11:21.42 |
+10:01:57.4 |
HIP 10288 |
24.51 |
| 2026-09-26 12:00 |
02:11:08.22 |
+10:00:25.9 |
HIP 10288 |
27.88 |
| 2026-09-27 00:00 |
02:10:54.82 |
+09:58:53.6 |
HIP 10288 |
31.35 |
| 2026-09-27 12:00 |
02:10:41.21 |
+09:57:20.3 |
HIP 10168 |
32.89 |
| 2026-09-28 00:00 |
02:10:27.40 |
+09:55:46.1 |
HIP 10168 |
31.64 |
| 2026-09-28 12:00 |
02:10:13.39 |
+09:54:11.0 |
HIP 10168 |
30.79 |
| 2026-09-29 00:00 |
02:09:59.19 |
+09:52:35.1 |
HIP 10168 |
30.41 |
| 2026-09-29 12:00 |
02:09:44.79 |
+09:50:58.4 |
HIP 10168 |
30.52 |
| 2026-09-30 00:00 |
02:09:30.21 |
+09:49:20.8 |
HIP 10168 |
31.13 |
| 2026-09-30 12:00 |
02:09:15.43 |
+09:47:42.4 |
HIP 10168 |
32.25 |
| 2026-10-01 00:00 |
02:09:00.47 |
+09:46:03.2 |
HIP 10168 |
33.83 |
| 2026-10-01 12:00 |
02:08:45.33 |
+09:44:23.2 |
HIP 10168 |
35.83 |
| 2026-10-02 00:00 |
02:08:30.01 |
+09:42:42.5 |
HIP 9810 |
37.53 |
| 2026-10-02 12:00 |
02:08:14.52 |
+09:41:01.1 |
HIP 9810 |
33.36 |
| 2026-10-03 00:00 |
02:07:58.85 |
+09:39:18.9 |
HIP 9810 |
29.14 |
| 2026-10-03 12:00 |
02:07:43.01 |
+09:37:36.0 |
HIP 9810 |
24.89 |
| 2026-10-04 00:00 |
02:07:27.01 |
+09:35:52.4 |
HIP 9810 |
20.59 |
| 2026-10-04 12:00 |
02:07:10.85 |
+09:34:08.2 |
HIP 9810 |
16.25 |
| 2026-10-05 00:00 |
02:06:54.53 |
+09:32:23.4 |
HIP 9810 |
11.89 |
| 2026-10-05 12:00 |
02:06:38.05 |
+09:30:37.9 |
HIP 9810 |
7.52 |
| 2026-10-06 00:00 |
02:06:21.42 |
+09:28:51.8 |
HIP 9810 |
3.26 |
| 2026-10-06 12:00 |
02:06:04.65 |
+09:27:05.1 |
HIP 9810 |
2.17 |
| 2026-10-07 00:00 |
02:05:47.73 |
+09:25:17.9 |
HIP 9810 |
6.31 |
| 2026-10-07 12:00 |
02:05:30.67 |
+09:23:30.2 |
HIP 9810 |
10.81 |
| 2026-10-08 00:00 |
02:05:13.47 |
+09:21:42.0 |
HIP 9810 |
15.39 |
| 2026-10-08 12:00 |
02:04:56.15 |
+09:19:53.2 |
HIP 9810 |
20.02 |
| 2026-10-09 00:00 |
02:04:38.69 |
+09:18:04.1 |
HIP 9810 |
24.69 |
| 2026-10-09 12:00 |
02:04:21.12 |
+09:16:14.5 |
HIP 9537 |
28.43 |
| 2026-10-10 00:00 |
02:04:03.42 |
+09:14:24.4 |
HIP 9537 |
23.70 |
| 2026-10-10 12:00 |
02:03:45.62 |
+09:12:34.0 |
HIP 9537 |
18.93 |
| 2026-10-11 00:00 |
02:03:27.70 |
+09:10:43.3 |
HIP 9537 |
14.14 |