| Parameter |
Value |
| Designation |
C/2024 U1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-06-30T16:18:58.452480Z |
| Orbit solution date (soln_date, UTC) |
2025-09-23T14:42:08Z |
| Obs used |
119 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-10-30T13:14:09.859200Z |
| Discovery magnitude (MPC) |
20.81 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-10-01.0000000 |
| e |
0.99368257 |
| q (au) |
4.835875 |
| a (au) |
765.481304 |
| i (deg) |
128.723018 |
| Ω (om, deg) |
270.243999 |
| ω (w, deg) |
188.077278 |
| M (ma, deg) |
0.004296 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.950 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.950 |
| n |
2.000 |
| gf |
0.946 |
| gb |
-0.984 |
| k |
1.000 |
| δ90 |
9.106 |
| 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 |
02:54:48.82 |
-31:26:52.5 |
HIP 13688 |
21.83 |
| 2026-06-01 12:00 |
02:54:58.76 |
-31:28:40.5 |
HIP 13688 |
21.01 |
| 2026-06-02 00:00 |
02:55:08.66 |
-31:30:30.0 |
HIP 13688 |
20.56 |
| 2026-06-02 12:00 |
02:55:18.50 |
-31:32:21.0 |
HIP 13688 |
20.51 |
| 2026-06-03 00:00 |
02:55:28.30 |
-31:34:13.4 |
HIP 13688 |
20.86 |
| 2026-06-03 12:00 |
02:55:38.04 |
-31:36:07.3 |
HIP 13688 |
21.61 |
| 2026-06-04 00:00 |
02:55:47.73 |
-31:38:02.7 |
HIP 13688 |
22.71 |
| 2026-06-04 12:00 |
02:55:57.37 |
-31:39:59.6 |
HIP 13688 |
24.12 |
| 2026-06-05 00:00 |
02:56:06.95 |
-31:41:57.9 |
HIP 13688 |
25.79 |
| 2026-06-05 12:00 |
02:56:16.48 |
-31:43:57.8 |
HIP 13688 |
27.67 |
| 2026-06-06 00:00 |
02:56:25.95 |
-31:45:59.1 |
HIP 13546 |
28.53 |
| 2026-06-06 12:00 |
02:56:35.37 |
-31:48:01.9 |
HIP 13546 |
29.45 |
| 2026-06-07 00:00 |
02:56:44.72 |
-31:50:06.2 |
HIP 13546 |
30.59 |
| 2026-06-07 12:00 |
02:56:54.02 |
-31:52:11.9 |
HIP 13546 |
31.92 |
| 2026-06-08 00:00 |
02:57:03.26 |
-31:54:19.2 |
HIP 13546 |
33.44 |
| 2026-06-08 12:00 |
02:57:12.44 |
-31:56:27.9 |
HIP 13546 |
35.11 |
| 2026-06-09 00:00 |
02:57:21.56 |
-31:58:38.1 |
HIP 13546 |
36.92 |
| 2026-06-09 12:00 |
02:57:30.62 |
-32:00:49.9 |
HIP 13546 |
38.84 |
| 2026-06-10 00:00 |
02:57:39.61 |
-32:03:03.1 |
HIP 13947 |
37.14 |
| 2026-06-10 12:00 |
02:57:48.54 |
-32:05:17.8 |
HIP 13947 |
34.20 |
| 2026-06-11 00:00 |
02:57:57.41 |
-32:07:34.0 |
HIP 13947 |
31.26 |
| 2026-06-11 12:00 |
02:58:06.20 |
-32:09:51.7 |
HIP 13947 |
28.31 |
| 2026-06-12 00:00 |
02:58:14.93 |
-32:12:10.9 |
HIP 13947 |
25.36 |
| 2026-06-12 12:00 |
02:58:23.59 |
-32:14:31.5 |
HIP 13947 |
22.40 |
| 2026-06-13 00:00 |
02:58:32.19 |
-32:16:53.7 |
HIP 13947 |
19.44 |
| 2026-06-13 12:00 |
02:58:40.71 |
-32:19:17.4 |
HIP 13947 |
16.49 |
| 2026-06-14 00:00 |
02:58:49.16 |
-32:21:42.5 |
HIP 13947 |
13.55 |
| 2026-06-14 12:00 |
02:58:57.53 |
-32:24:09.2 |
HIP 13947 |
10.65 |
| 2026-06-15 00:00 |
02:59:05.83 |
-32:26:37.3 |
HIP 13947 |
7.84 |
| 2026-06-15 12:00 |
02:59:14.06 |
-32:29:06.9 |
HIP 13947 |
5.28 |
| 2026-06-16 00:00 |
02:59:22.21 |
-32:31:38.1 |
HIP 13947 |
3.60 |
| 2026-06-16 12:00 |
02:59:30.29 |
-32:34:10.7 |
HIP 13947 |
4.11 |
| 2026-06-17 00:00 |
02:59:38.28 |
-32:36:44.8 |
HIP 13947 |
6.31 |
| 2026-06-17 12:00 |
02:59:46.20 |
-32:39:20.3 |
HIP 13947 |
9.06 |
| 2026-06-18 00:00 |
02:59:54.04 |
-32:41:57.4 |
HIP 13947 |
11.99 |
| 2026-06-18 12:00 |
03:00:01.79 |
-32:44:35.9 |
HIP 13911 |
14.89 |
| 2026-06-19 00:00 |
03:00:09.46 |
-32:47:15.9 |
HIP 13911 |
14.56 |
| 2026-06-19 12:00 |
03:00:17.05 |
-32:49:57.4 |
HIP 13911 |
14.86 |
| 2026-06-20 00:00 |
03:00:24.56 |
-32:52:40.3 |
HIP 13911 |
15.77 |
| 2026-06-20 12:00 |
03:00:31.98 |
-32:55:24.7 |
HIP 14056 |
13.07 |
| 2026-06-21 00:00 |
03:00:39.31 |
-32:58:10.6 |
HIP 14056 |
9.91 |
| 2026-06-21 12:00 |
03:00:46.56 |
-33:00:57.9 |
HIP 14056 |
6.74 |
| 2026-06-22 00:00 |
03:00:53.72 |
-33:03:46.7 |
HIP 14056 |
3.58 |