| Parameter |
Value |
| Designation |
P/2024 R2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-10-01T23:06:13.608000Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:03Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-09-03T12:43:40.080000Z |
| Discovery magnitude (MPC) |
20.72 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-09-12.0000000 |
| e |
0.26821638 |
| q (au) |
2.303780 |
| a (au) |
3.148171 |
| i (deg) |
15.120781 |
| Ω (om, deg) |
193.061486 |
| ω (w, deg) |
203.974490 |
| M (ma, deg) |
356.477630 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.480 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.480 |
| n |
2.000 |
| gf |
0.968 |
| gb |
-0.728 |
| k |
1.000 |
| δ90 |
9.955 |
| 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) |
| 2026-03-26 00:00 |
10:02:55.81 |
+00:29:39.0 |
HIP 49217 |
36.08 |
| 2026-03-26 12:00 |
10:02:43.93 |
+00:33:14.5 |
HIP 49217 |
32.45 |
| 2026-03-27 00:00 |
10:02:32.31 |
+00:36:48.9 |
HIP 49217 |
29.12 |
| 2026-03-27 12:00 |
10:02:20.95 |
+00:40:22.2 |
HIP 49217 |
26.19 |
| 2026-03-28 00:00 |
10:02:09.86 |
+00:43:54.3 |
HIP 49217 |
23.76 |
| 2026-03-28 12:00 |
10:01:59.05 |
+00:47:25.2 |
HIP 49058 |
20.71 |
| 2026-03-29 00:00 |
10:01:48.50 |
+00:50:54.9 |
HIP 49135 |
17.08 |
| 2026-03-29 12:00 |
10:01:38.23 |
+00:54:23.4 |
HIP 49135 |
13.49 |
| 2026-03-30 00:00 |
10:01:28.22 |
+00:57:50.6 |
HIP 49135 |
10.45 |
| 2026-03-30 12:00 |
10:01:18.50 |
+01:01:16.5 |
HIP 49135 |
8.52 |
| 2026-03-31 00:00 |
10:01:09.04 |
+01:04:41.1 |
HIP 49135 |
8.38 |
| 2026-03-31 12:00 |
10:00:59.87 |
+01:08:04.5 |
HIP 49135 |
10.05 |
| 2026-04-01 00:00 |
10:00:50.96 |
+01:11:26.4 |
HIP 49135 |
12.78 |
| 2026-04-01 12:00 |
10:00:42.34 |
+01:14:47.0 |
HIP 49135 |
16.00 |
| 2026-04-02 00:00 |
10:00:34.00 |
+01:18:06.2 |
HIP 49135 |
19.43 |
| 2026-04-02 12:00 |
10:00:25.93 |
+01:21:24.1 |
HIP 49135 |
22.95 |
| 2026-04-03 00:00 |
10:00:18.14 |
+01:24:40.4 |
HIP 49020 |
26.33 |
| 2026-04-03 12:00 |
10:00:10.64 |
+01:27:55.4 |
HIP 49020 |
22.90 |
| 2026-04-04 00:00 |
10:00:03.41 |
+01:31:08.9 |
HIP 49020 |
19.61 |
| 2026-04-04 12:00 |
09:59:56.47 |
+01:34:20.9 |
HIP 49020 |
16.51 |
| 2026-04-05 00:00 |
09:59:49.81 |
+01:37:31.4 |
HIP 49020 |
13.68 |
| 2026-04-05 12:00 |
09:59:43.43 |
+01:40:40.3 |
HIP 49020 |
11.28 |
| 2026-04-06 00:00 |
09:59:37.33 |
+01:43:47.8 |
HIP 49020 |
9.58 |
| 2026-04-06 12:00 |
09:59:31.52 |
+01:46:53.7 |
HIP 49020 |
8.92 |
| 2026-04-07 00:00 |
09:59:25.99 |
+01:49:58.1 |
HIP 49020 |
9.45 |
| 2026-04-07 12:00 |
09:59:20.74 |
+01:53:00.8 |
HIP 49020 |
10.96 |
| 2026-04-08 00:00 |
09:59:15.78 |
+01:56:02.0 |
HIP 49020 |
13.08 |
| 2026-04-08 12:00 |
09:59:11.11 |
+01:59:01.5 |
HIP 49020 |
15.52 |
| 2026-04-09 00:00 |
09:59:06.71 |
+02:01:59.5 |
HIP 49020 |
18.13 |
| 2026-04-09 12:00 |
09:59:02.60 |
+02:04:55.8 |
HIP 49020 |
20.82 |
| 2026-04-10 00:00 |
09:58:58.78 |
+02:07:50.4 |
HIP 48815 |
23.09 |
| 2026-04-10 12:00 |
09:58:55.24 |
+02:10:43.4 |
HIP 48815 |
22.58 |
| 2026-04-11 00:00 |
09:58:51.99 |
+02:13:34.7 |
HIP 48815 |
22.52 |
| 2026-04-11 12:00 |
09:58:49.02 |
+02:16:24.3 |
HIP 48815 |
22.90 |
| 2026-04-12 00:00 |
09:58:46.34 |
+02:19:12.2 |
HIP 48815 |
23.69 |
| 2026-04-12 12:00 |
09:58:43.94 |
+02:21:58.4 |
HIP 48815 |
24.82 |
| 2026-04-13 00:00 |
09:58:41.83 |
+02:24:42.8 |
HIP 48815 |
26.24 |
| 2026-04-13 12:00 |
09:58:40.00 |
+02:27:25.5 |
HIP 48815 |
27.90 |
| 2026-04-14 00:00 |
09:58:38.45 |
+02:30:06.5 |
HIP 48815 |
29.73 |
| 2026-04-14 12:00 |
09:58:37.19 |
+02:32:45.7 |
HIP 48971 |
27.55 |
| 2026-04-15 00:00 |
09:58:36.21 |
+02:35:23.1 |
HIP 48971 |
25.29 |
| 2026-04-15 12:00 |
09:58:35.52 |
+02:37:58.8 |
HIP 48971 |
23.11 |
| 2026-04-16 00:00 |
09:58:35.11 |
+02:40:32.6 |
HIP 48971 |
21.00 |