| Parameter |
Value |
| Designation |
441P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-09-07T17:24:33.022080Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T11:12:49Z |
| Obs used |
208 |
| NEO |
- |
| M1 |
15.500 |
| 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) |
2022-01-24.0000000 |
| e |
0.19560657 |
| q (au) |
3.326116 |
| a (au) |
4.134936 |
| i (deg) |
2.574089 |
| Ω (om, deg) |
143.611674 |
| ω (w, deg) |
178.713946 |
| M (ma, deg) |
204.950449 |
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) |
| 2026-07-29 00:00 |
02:07:52.56 |
+10:36:46.8 |
HIP 9842 |
19.69 |
| 2026-07-29 12:00 |
02:08:08.72 |
+10:37:46.4 |
HIP 9904 |
22.50 |
| 2026-07-30 00:00 |
02:08:24.67 |
+10:38:44.9 |
HIP 9964 |
21.73 |
| 2026-07-30 12:00 |
02:08:40.41 |
+10:39:42.0 |
HIP 9964 |
21.41 |
| 2026-07-31 00:00 |
02:08:55.94 |
+10:40:38.0 |
HIP 9964 |
21.82 |
| 2026-07-31 12:00 |
02:09:11.26 |
+10:41:32.6 |
HIP 9964 |
22.89 |
| 2026-08-01 00:00 |
02:09:26.37 |
+10:42:26.0 |
HIP 9964 |
24.51 |
| 2026-08-01 12:00 |
02:09:41.26 |
+10:43:18.1 |
HIP 9964 |
26.56 |
| 2026-08-02 00:00 |
02:09:55.93 |
+10:44:08.9 |
HIP 9964 |
28.92 |
| 2026-08-02 12:00 |
02:10:10.38 |
+10:44:58.5 |
HIP 9964 |
31.50 |
| 2026-08-03 00:00 |
02:10:24.62 |
+10:45:46.8 |
HIP 9964 |
34.24 |
| 2026-08-03 12:00 |
02:10:38.63 |
+10:46:33.7 |
HIP 9964 |
37.08 |
| 2026-08-04 00:00 |
02:10:52.42 |
+10:47:19.4 |
HIP 10288 |
36.55 |
| 2026-08-04 12:00 |
02:11:05.99 |
+10:48:03.8 |
HIP 10288 |
35.05 |
| 2026-08-05 00:00 |
02:11:19.34 |
+10:48:46.9 |
HIP 10288 |
33.84 |
| 2026-08-05 12:00 |
02:11:32.45 |
+10:49:28.7 |
HIP 10288 |
32.94 |
| 2026-08-06 00:00 |
02:11:45.34 |
+10:50:09.1 |
HIP 10288 |
32.34 |
| 2026-08-06 12:00 |
02:11:58.00 |
+10:50:48.3 |
HIP 10288 |
32.05 |
| 2026-08-07 00:00 |
02:12:10.43 |
+10:51:26.1 |
HIP 10288 |
32.07 |
| 2026-08-07 12:00 |
02:12:22.63 |
+10:52:02.7 |
HIP 10288 |
32.36 |
| 2026-08-08 00:00 |
02:12:34.59 |
+10:52:37.8 |
HIP 10288 |
32.92 |
| 2026-08-08 12:00 |
02:12:46.32 |
+10:53:11.7 |
HIP 10288 |
33.70 |
| 2026-08-09 00:00 |
02:12:57.81 |
+10:53:44.2 |
HIP 10288 |
34.69 |
| 2026-08-09 12:00 |
02:13:09.06 |
+10:54:15.4 |
HIP 10288 |
35.84 |
| 2026-08-10 00:00 |
02:13:20.08 |
+10:54:45.3 |
HIP 10530 |
35.76 |
| 2026-08-10 12:00 |
02:13:30.85 |
+10:55:13.8 |
HIP 10530 |
33.33 |
| 2026-08-11 00:00 |
02:13:41.38 |
+10:55:40.9 |
HIP 10530 |
30.98 |
| 2026-08-11 12:00 |
02:13:51.67 |
+10:56:06.7 |
HIP 10530 |
28.73 |
| 2026-08-12 00:00 |
02:14:01.72 |
+10:56:31.2 |
HIP 10530 |
26.59 |
| 2026-08-12 12:00 |
02:14:11.52 |
+10:56:54.3 |
HIP 10530 |
24.56 |
| 2026-08-13 00:00 |
02:14:21.07 |
+10:57:16.0 |
HIP 10530 |
22.65 |
| 2026-08-13 12:00 |
02:14:30.38 |
+10:57:36.4 |
HIP 10530 |
20.88 |
| 2026-08-14 00:00 |
02:14:39.44 |
+10:57:55.4 |
HIP 10530 |
19.25 |
| 2026-08-14 12:00 |
02:14:48.25 |
+10:58:13.1 |
HIP 10530 |
17.79 |
| 2026-08-15 00:00 |
02:14:56.81 |
+10:58:29.4 |
HIP 10530 |
16.51 |
| 2026-08-15 12:00 |
02:15:05.11 |
+10:58:44.4 |
HIP 10530 |
15.44 |
| 2026-08-16 00:00 |
02:15:13.17 |
+10:58:58.0 |
HIP 10533 |
14.57 |
| 2026-08-16 12:00 |
02:15:20.97 |
+10:59:10.2 |
HIP 10533 |
13.92 |
| 2026-08-17 00:00 |
02:15:28.52 |
+10:59:21.1 |
HIP 10533 |
13.51 |
| 2026-08-17 12:00 |
02:15:35.82 |
+10:59:30.6 |
HIP 10533 |
13.33 |
| 2026-08-18 00:00 |
02:15:42.86 |
+10:59:38.7 |
HIP 10533 |
13.38 |
| 2026-08-18 12:00 |
02:15:49.64 |
+10:59:45.5 |
HIP 10533 |
13.61 |
| 2026-08-19 00:00 |
02:15:56.17 |
+10:59:50.9 |
HIP 10533 |
14.00 |