| Parameter |
Value |
| Designation |
441P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-09-07T17:20:30.799680Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:49Z |
| Obs used |
204 |
| 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) |
2022-01-23.0000000 |
| e |
0.19560717 |
| q (au) |
3.326113 |
| a (au) |
4.134936 |
| i (deg) |
2.574094 |
| Ω (om, deg) |
143.611657 |
| ω (w, deg) |
178.713774 |
| M (ma, deg) |
204.833512 |
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) |
| 2026-06-01 00:00 |
01:18:18.89 |
+06:35:59.2 |
HIP 5980 |
24.39 |
| 2026-06-01 12:00 |
01:18:51.42 |
+06:38:58.5 |
HIP 5980 |
30.48 |
| 2026-06-02 00:00 |
01:19:23.87 |
+06:41:56.9 |
HIP 6220 |
32.65 |
| 2026-06-02 12:00 |
01:19:56.23 |
+06:44:54.6 |
HIP 6332 |
24.27 |
| 2026-06-03 00:00 |
01:20:28.50 |
+06:47:51.5 |
HIP 6332 |
16.07 |
| 2026-06-03 12:00 |
01:21:00.69 |
+06:50:47.5 |
HIP 6332 |
8.59 |
| 2026-06-04 00:00 |
01:21:32.79 |
+06:53:42.8 |
HIP 6332 |
5.85 |
| 2026-06-04 12:00 |
01:22:04.81 |
+06:56:37.3 |
HIP 6332 |
11.75 |
| 2026-06-05 00:00 |
01:22:36.73 |
+06:59:30.9 |
HIP 6490 |
19.03 |
| 2026-06-05 12:00 |
01:23:08.57 |
+07:02:23.8 |
HIP 6490 |
18.33 |
| 2026-06-06 00:00 |
01:23:40.31 |
+07:05:15.8 |
HIP 6490 |
21.22 |
| 2026-06-06 12:00 |
01:24:11.96 |
+07:08:07.0 |
HIP 6454 |
25.25 |
| 2026-06-07 00:00 |
01:24:43.53 |
+07:10:57.4 |
HIP 6454 |
30.04 |
| 2026-06-07 12:00 |
01:25:15.00 |
+07:13:46.9 |
HIP 6731 |
24.75 |
| 2026-06-08 00:00 |
01:25:46.37 |
+07:16:35.6 |
HIP 6731 |
16.68 |
| 2026-06-08 12:00 |
01:26:17.65 |
+07:19:23.5 |
HIP 6731 |
9.01 |
| 2026-06-09 00:00 |
01:26:48.84 |
+07:22:10.5 |
HIP 6731 |
4.48 |
| 2026-06-09 12:00 |
01:27:19.93 |
+07:24:56.7 |
HIP 6731 |
9.67 |
| 2026-06-10 00:00 |
01:27:50.92 |
+07:27:42.0 |
HIP 6731 |
17.33 |
| 2026-06-10 12:00 |
01:28:21.81 |
+07:30:26.4 |
HIP 6915 |
16.38 |
| 2026-06-11 00:00 |
01:28:52.61 |
+07:33:10.0 |
HIP 6915 |
15.73 |
| 2026-06-11 12:00 |
01:29:23.30 |
+07:35:52.7 |
HIP 6915 |
18.90 |
| 2026-06-12 00:00 |
01:29:53.89 |
+07:38:34.5 |
HIP 7071 |
18.83 |
| 2026-06-12 12:00 |
01:30:24.38 |
+07:41:15.4 |
HIP 7071 |
11.02 |
| 2026-06-13 00:00 |
01:30:54.77 |
+07:43:55.4 |
HIP 7071 |
4.10 |
| 2026-06-13 12:00 |
01:31:25.05 |
+07:46:34.6 |
HIP 7071 |
6.29 |
| 2026-06-14 00:00 |
01:31:55.23 |
+07:49:12.8 |
HIP 7071 |
13.71 |
| 2026-06-14 12:00 |
01:32:25.30 |
+07:51:50.1 |
HIP 7071 |
21.47 |
| 2026-06-15 00:00 |
01:32:55.26 |
+07:54:26.5 |
HIP 7243 |
18.96 |
| 2026-06-15 12:00 |
01:33:25.12 |
+07:57:02.0 |
HIP 7243 |
15.59 |
| 2026-06-16 00:00 |
01:33:54.86 |
+07:59:36.6 |
HIP 7243 |
15.78 |
| 2026-06-16 12:00 |
01:34:24.50 |
+08:02:10.3 |
HIP 7366 |
15.92 |
| 2026-06-17 00:00 |
01:34:54.02 |
+08:04:43.0 |
HIP 7366 |
11.78 |
| 2026-06-17 12:00 |
01:35:23.43 |
+08:07:14.8 |
HIP 7366 |
11.99 |
| 2026-06-18 00:00 |
01:35:52.73 |
+08:09:45.6 |
HIP 7366 |
16.34 |
| 2026-06-18 12:00 |
01:36:21.91 |
+08:12:15.6 |
HIP 7366 |
22.51 |
| 2026-06-19 00:00 |
01:36:50.98 |
+08:14:44.5 |
HIP 7505 |
24.92 |
| 2026-06-19 12:00 |
01:37:19.93 |
+08:17:12.5 |
HIP 7686 |
26.08 |
| 2026-06-20 00:00 |
01:37:48.76 |
+08:19:39.6 |
HIP 7686 |
21.05 |
| 2026-06-20 12:00 |
01:38:17.48 |
+08:22:05.7 |
HIP 7686 |
17.88 |
| 2026-06-21 00:00 |
01:38:46.08 |
+08:24:30.9 |
HIP 7686 |
17.57 |
| 2026-06-21 12:00 |
01:39:14.55 |
+08:26:55.1 |
HIP 7686 |
20.22 |
| 2026-06-22 00:00 |
01:39:42.91 |
+08:29:18.3 |
HIP 7819 |
20.79 |