| Parameter |
Value |
| Designation |
P/2022 R4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-10T09:08:14.683200Z |
| Orbit solution date (soln_date, UTC) |
2022-12-08T23:43:20Z |
| Obs used |
44 |
| NEO |
- |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-02T13:50:22.128000Z |
| Discovery magnitude (MPC) |
21.38 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-02.0000000 |
| e |
0.49035777 |
| q (au) |
1.955577 |
| a (au) |
3.837156 |
| i (deg) |
21.021791 |
| Ω (om, deg) |
176.624038 |
| ω (w, deg) |
197.431178 |
| M (ma, deg) |
10.964688 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.847 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.847 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-06-01 00:00 |
12:34:52.08 |
+04:39:59.4 |
HIP 61341 |
20.84 |
| 2026-06-01 12:00 |
12:34:48.58 |
+04:40:17.8 |
HIP 61341 |
20.13 |
| 2026-06-02 00:00 |
12:34:45.24 |
+04:40:35.0 |
HIP 61341 |
19.47 |
| 2026-06-02 12:00 |
12:34:42.06 |
+04:40:51.0 |
HIP 61341 |
18.87 |
| 2026-06-03 00:00 |
12:34:39.04 |
+04:41:05.8 |
HIP 61341 |
18.32 |
| 2026-06-03 12:00 |
12:34:36.18 |
+04:41:19.4 |
HIP 61341 |
17.82 |
| 2026-06-04 00:00 |
12:34:33.49 |
+04:41:31.8 |
HIP 61341 |
17.37 |
| 2026-06-04 12:00 |
12:34:30.95 |
+04:41:43.0 |
HIP 61341 |
16.97 |
| 2026-06-05 00:00 |
12:34:28.58 |
+04:41:53.1 |
HIP 61341 |
16.62 |
| 2026-06-05 12:00 |
12:34:26.37 |
+04:42:01.9 |
HIP 61341 |
16.32 |
| 2026-06-06 00:00 |
12:34:24.31 |
+04:42:09.6 |
HIP 61341 |
16.06 |
| 2026-06-06 12:00 |
12:34:22.43 |
+04:42:16.1 |
HIP 61341 |
15.84 |
| 2026-06-07 00:00 |
12:34:20.70 |
+04:42:21.4 |
HIP 61341 |
15.66 |
| 2026-06-07 12:00 |
12:34:19.13 |
+04:42:25.5 |
HIP 61341 |
15.52 |
| 2026-06-08 00:00 |
12:34:17.72 |
+04:42:28.5 |
HIP 61341 |
15.41 |
| 2026-06-08 12:00 |
12:34:16.48 |
+04:42:30.3 |
HIP 61341 |
15.34 |
| 2026-06-09 00:00 |
12:34:15.40 |
+04:42:31.0 |
HIP 61341 |
15.29 |
| 2026-06-09 12:00 |
12:34:14.48 |
+04:42:30.5 |
HIP 61341 |
15.27 |
| 2026-06-10 00:00 |
12:34:13.71 |
+04:42:28.9 |
HIP 61341 |
15.28 |
| 2026-06-10 12:00 |
12:34:13.11 |
+04:42:26.1 |
HIP 61341 |
15.31 |
| 2026-06-11 00:00 |
12:34:12.68 |
+04:42:22.2 |
HIP 61341 |
15.37 |
| 2026-06-11 12:00 |
12:34:12.40 |
+04:42:17.1 |
HIP 61341 |
15.45 |
| 2026-06-12 00:00 |
12:34:12.28 |
+04:42:10.9 |
HIP 61341 |
15.55 |
| 2026-06-12 12:00 |
12:34:12.32 |
+04:42:03.6 |
HIP 61341 |
15.67 |
| 2026-06-13 00:00 |
12:34:12.53 |
+04:41:55.1 |
HIP 61341 |
15.82 |
| 2026-06-13 12:00 |
12:34:12.89 |
+04:41:45.6 |
HIP 61341 |
15.98 |
| 2026-06-14 00:00 |
12:34:13.41 |
+04:41:34.9 |
HIP 61341 |
16.17 |
| 2026-06-14 12:00 |
12:34:14.10 |
+04:41:23.1 |
HIP 61341 |
16.38 |
| 2026-06-15 00:00 |
12:34:14.94 |
+04:41:10.2 |
HIP 61341 |
16.61 |
| 2026-06-15 12:00 |
12:34:15.95 |
+04:40:56.2 |
HIP 61341 |
16.87 |
| 2026-06-16 00:00 |
12:34:17.11 |
+04:40:41.2 |
HIP 61341 |
17.16 |
| 2026-06-16 12:00 |
12:34:18.43 |
+04:40:25.0 |
HIP 61341 |
17.47 |
| 2026-06-17 00:00 |
12:34:19.91 |
+04:40:07.7 |
HIP 61341 |
17.82 |
| 2026-06-17 12:00 |
12:34:21.55 |
+04:39:49.4 |
HIP 61341 |
18.19 |
| 2026-06-18 00:00 |
12:34:23.34 |
+04:39:30.0 |
HIP 61341 |
18.59 |
| 2026-06-18 12:00 |
12:34:25.30 |
+04:39:09.6 |
HIP 61341 |
19.03 |
| 2026-06-19 00:00 |
12:34:27.41 |
+04:38:48.1 |
HIP 61341 |
19.50 |
| 2026-06-19 12:00 |
12:34:29.67 |
+04:38:25.6 |
HIP 61341 |
20.01 |
| 2026-06-20 00:00 |
12:34:32.09 |
+04:38:02.0 |
HIP 61341 |
20.56 |
| 2026-06-20 12:00 |
12:34:34.67 |
+04:37:37.4 |
HIP 61341 |
21.15 |
| 2026-06-21 00:00 |
12:34:37.40 |
+04:37:11.7 |
HIP 61341 |
21.77 |
| 2026-06-21 12:00 |
12:34:40.29 |
+04:36:45.1 |
HIP 61341 |
22.44 |
| 2026-06-22 00:00 |
12:34:43.33 |
+04:36:17.4 |
HIP 61341 |
23.15 |