| Parameter |
Value |
| Designation |
P/2024 R1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-06-15T15:55:12.869760Z |
| Orbit solution date (soln_date, UTC) |
2024-10-11T15:13:32Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
19.200 |
| K1 |
5.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-09-01T13:19:48.633600Z |
| Discovery magnitude (MPC) |
21.36 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-09-08.0000000 |
| e |
0.49291197 |
| q (au) |
1.749729 |
| a (au) |
3.450542 |
| i (deg) |
12.736343 |
| Ω (om, deg) |
84.982836 |
| ω (w, deg) |
230.577928 |
| M (ma, deg) |
12.968491 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.458 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.458 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.541 |
| k |
0.800 |
| δ90 |
10.000 |
| 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) |
| 2026-09-20 00:00 |
08:27:12.01 |
+24:49:33.5 |
HIP 41389 |
18.96 |
| 2026-09-20 12:00 |
08:27:33.67 |
+24:49:08.1 |
HIP 41389 |
21.00 |
| 2026-09-21 00:00 |
08:27:55.21 |
+24:48:43.2 |
HIP 41389 |
23.89 |
| 2026-09-21 12:00 |
08:28:16.63 |
+24:48:18.7 |
HIP 41389 |
27.35 |
| 2026-09-22 00:00 |
08:28:37.94 |
+24:47:54.7 |
HIP 41660 |
30.67 |
| 2026-09-22 12:00 |
08:28:59.12 |
+24:47:31.1 |
HIP 41660 |
28.40 |
| 2026-09-23 00:00 |
08:29:20.19 |
+24:47:08.0 |
HIP 41660 |
26.83 |
| 2026-09-23 12:00 |
08:29:41.14 |
+24:46:45.4 |
HIP 41660 |
26.07 |
| 2026-09-24 00:00 |
08:30:01.96 |
+24:46:23.3 |
HIP 41812 |
23.39 |
| 2026-09-24 12:00 |
08:30:22.66 |
+24:46:01.7 |
HIP 41812 |
19.82 |
| 2026-09-25 00:00 |
08:30:43.24 |
+24:45:40.6 |
HIP 41812 |
16.81 |
| 2026-09-25 12:00 |
08:31:03.69 |
+24:45:20.0 |
HIP 41812 |
14.72 |
| 2026-09-26 00:00 |
08:31:24.02 |
+24:44:59.9 |
HIP 41812 |
13.92 |
| 2026-09-26 12:00 |
08:31:44.23 |
+24:44:40.3 |
HIP 41812 |
14.60 |
| 2026-09-27 00:00 |
08:32:04.31 |
+24:44:21.3 |
HIP 41812 |
16.56 |
| 2026-09-27 12:00 |
08:32:24.26 |
+24:44:02.7 |
HIP 41812 |
19.38 |
| 2026-09-28 00:00 |
08:32:44.08 |
+24:43:44.7 |
HIP 42039 |
21.21 |
| 2026-09-28 12:00 |
08:33:03.77 |
+24:43:27.3 |
HIP 42039 |
17.03 |
| 2026-09-29 00:00 |
08:33:23.33 |
+24:43:10.4 |
HIP 42039 |
13.08 |
| 2026-09-29 12:00 |
08:33:42.77 |
+24:42:54.0 |
HIP 42039 |
9.61 |
| 2026-09-30 00:00 |
08:34:02.07 |
+24:42:38.2 |
HIP 42039 |
7.28 |
| 2026-09-30 12:00 |
08:34:21.23 |
+24:42:23.0 |
HIP 42039 |
7.23 |
| 2026-10-01 00:00 |
08:34:40.27 |
+24:42:08.4 |
HIP 42039 |
9.44 |
| 2026-10-01 12:00 |
08:34:59.16 |
+24:41:54.3 |
HIP 42039 |
12.77 |
| 2026-10-02 00:00 |
08:35:17.93 |
+24:41:40.9 |
HIP 42039 |
16.53 |
| 2026-10-02 12:00 |
08:35:36.55 |
+24:41:28.0 |
HIP 42039 |
20.46 |
| 2026-10-03 00:00 |
08:35:55.04 |
+24:41:15.7 |
HIP 42248 |
17.59 |
| 2026-10-03 12:00 |
08:36:13.39 |
+24:41:04.1 |
HIP 42248 |
14.87 |
| 2026-10-04 00:00 |
08:36:31.60 |
+24:40:53.0 |
HIP 42248 |
12.97 |
| 2026-10-04 12:00 |
08:36:49.67 |
+24:40:42.6 |
HIP 42248 |
12.25 |
| 2026-10-05 00:00 |
08:37:07.59 |
+24:40:32.8 |
HIP 42248 |
12.87 |
| 2026-10-05 12:00 |
08:37:25.37 |
+24:40:23.7 |
HIP 42248 |
14.63 |
| 2026-10-06 00:00 |
08:37:43.01 |
+24:40:15.2 |
HIP 42248 |
17.17 |
| 2026-10-06 12:00 |
08:38:00.50 |
+24:40:07.3 |
HIP 42423 |
19.27 |
| 2026-10-07 00:00 |
08:38:17.85 |
+24:40:00.1 |
HIP 42423 |
16.50 |
| 2026-10-07 12:00 |
08:38:35.04 |
+24:39:53.6 |
HIP 42423 |
14.32 |
| 2026-10-08 00:00 |
08:38:52.09 |
+24:39:47.8 |
HIP 42479 |
10.55 |
| 2026-10-08 12:00 |
08:39:08.99 |
+24:39:42.6 |
HIP 42479 |
6.86 |
| 2026-10-09 00:00 |
08:39:25.74 |
+24:39:38.1 |
HIP 42479 |
3.54 |
| 2026-10-09 12:00 |
08:39:42.33 |
+24:39:34.3 |
HIP 42479 |
2.63 |
| 2026-10-10 00:00 |
08:39:58.77 |
+24:39:31.3 |
HIP 42479 |
5.43 |
| 2026-10-10 12:00 |
08:40:15.05 |
+24:39:28.9 |
HIP 42479 |
8.91 |
| 2026-10-11 00:00 |
08:40:31.18 |
+24:39:27.2 |
HIP 42479 |
12.48 |