| 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) |
| 2026-07-29 00:00 |
07:40:36.92 |
+25:57:16.1 |
HIP 37452 |
9.92 |
| 2026-07-29 12:00 |
07:41:06.55 |
+25:56:34.7 |
HIP 37452 |
4.07 |
| 2026-07-30 00:00 |
07:41:36.15 |
+25:55:53.2 |
HIP 37452 |
4.93 |
| 2026-07-30 12:00 |
07:42:05.70 |
+25:55:11.7 |
HIP 37452 |
11.02 |
| 2026-07-31 00:00 |
07:42:35.21 |
+25:54:30.0 |
HIP 37452 |
17.53 |
| 2026-07-31 12:00 |
07:43:04.68 |
+25:53:48.3 |
HIP 37704 |
15.55 |
| 2026-08-01 00:00 |
07:43:34.11 |
+25:53:06.5 |
HIP 37704 |
9.55 |
| 2026-08-01 12:00 |
07:44:03.50 |
+25:52:24.6 |
HIP 37704 |
5.41 |
| 2026-08-02 00:00 |
07:44:32.85 |
+25:51:42.6 |
HIP 37704 |
7.47 |
| 2026-08-02 12:00 |
07:45:02.15 |
+25:51:00.6 |
HIP 37848 |
10.70 |
| 2026-08-03 00:00 |
07:45:31.42 |
+25:50:18.5 |
HIP 37848 |
9.02 |
| 2026-08-03 12:00 |
07:46:00.63 |
+25:49:36.3 |
HIP 37848 |
11.64 |
| 2026-08-04 00:00 |
07:46:29.81 |
+25:48:54.1 |
HIP 37971 |
14.15 |
| 2026-08-04 12:00 |
07:46:58.93 |
+25:48:11.8 |
HIP 37971 |
13.29 |
| 2026-08-05 00:00 |
07:47:28.02 |
+25:47:29.4 |
HIP 37971 |
15.49 |
| 2026-08-05 12:00 |
07:47:57.05 |
+25:46:47.1 |
HIP 37971 |
19.74 |
| 2026-08-06 00:00 |
07:48:26.04 |
+25:46:04.6 |
HIP 37971 |
25.00 |
| 2026-08-06 12:00 |
07:48:54.98 |
+25:45:22.1 |
HIP 37971 |
30.76 |
| 2026-08-07 00:00 |
07:49:23.87 |
+25:44:39.6 |
HIP 38221 |
31.63 |
| 2026-08-07 12:00 |
07:49:52.72 |
+25:43:57.1 |
HIP 38221 |
31.90 |
| 2026-08-08 00:00 |
07:50:21.51 |
+25:43:14.5 |
HIP 38221 |
33.46 |
| 2026-08-08 12:00 |
07:50:50.26 |
+25:42:31.9 |
HIP 38312 |
35.93 |
| 2026-08-09 00:00 |
07:51:18.95 |
+25:41:49.3 |
HIP 38312 |
35.51 |
| 2026-08-09 12:00 |
07:51:47.59 |
+25:41:06.7 |
HIP 38312 |
36.27 |
| 2026-08-10 00:00 |
07:52:16.18 |
+25:40:24.1 |
HIP 38312 |
38.14 |
| 2026-08-10 12:00 |
07:52:44.71 |
+25:39:41.5 |
HIP 38630 |
36.91 |
| 2026-08-11 00:00 |
07:53:13.19 |
+25:38:58.8 |
HIP 38630 |
32.26 |
| 2026-08-11 12:00 |
07:53:41.61 |
+25:38:16.2 |
HIP 38630 |
28.34 |
| 2026-08-12 00:00 |
07:54:09.98 |
+25:37:33.6 |
HIP 38630 |
25.48 |
| 2026-08-12 12:00 |
07:54:38.29 |
+25:36:51.0 |
HIP 38630 |
24.05 |
| 2026-08-13 00:00 |
07:55:06.55 |
+25:36:08.4 |
HIP 38630 |
24.29 |
| 2026-08-13 12:00 |
07:55:34.74 |
+25:35:25.9 |
HIP 38630 |
26.15 |
| 2026-08-14 00:00 |
07:56:02.88 |
+25:34:43.3 |
HIP 38630 |
29.31 |
| 2026-08-14 12:00 |
07:56:30.95 |
+25:34:00.9 |
HIP 38832 |
32.53 |
| 2026-08-15 00:00 |
07:56:58.97 |
+25:33:18.4 |
HIP 38832 |
33.10 |
| 2026-08-15 12:00 |
07:57:26.92 |
+25:32:36.0 |
HIP 38985 |
33.11 |
| 2026-08-16 00:00 |
07:57:54.82 |
+25:31:53.7 |
HIP 38985 |
31.18 |
| 2026-08-16 12:00 |
07:58:22.65 |
+25:31:11.4 |
HIP 38985 |
30.45 |
| 2026-08-17 00:00 |
07:58:50.41 |
+25:30:29.1 |
HIP 39191 |
29.15 |
| 2026-08-17 12:00 |
07:59:18.11 |
+25:29:47.0 |
HIP 39191 |
22.93 |
| 2026-08-18 00:00 |
07:59:45.75 |
+25:29:04.9 |
HIP 39191 |
16.76 |
| 2026-08-18 12:00 |
08:00:13.32 |
+25:28:22.8 |
HIP 39191 |
10.74 |
| 2026-08-19 00:00 |
08:00:40.82 |
+25:27:40.9 |
HIP 39191 |
5.33 |