P/2022 R5 (PANSTARRS)
| Parameter |
Value |
| Designation |
P/2022 R5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-05-27T20:48:27.054720Z |
| Orbit solution date (soln_date, UTC) |
2022-11-29T21:43:49Z |
| Obs used |
47 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-08T14:25:00.393600Z |
| Discovery magnitude (MPC) |
21.35 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-13.0000000 |
| e |
0.19578965 |
| q (au) |
2.469627 |
| a (au) |
3.070872 |
| i (deg) |
15.291928 |
| Ω (om, deg) |
115.067048 |
| ω (w, deg) |
240.680778 |
| M (ma, deg) |
25.299334 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.907 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.907 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.559 |
| 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) |
| 2026-02-03 00:00 |
16:08:42.18 |
-06:57:40.5 |
HIP 79174 |
18.70 |
| 2026-02-03 12:00 |
16:09:10.13 |
-06:57:45.9 |
HIP 79174 |
15.12 |
| 2026-02-04 00:00 |
16:09:37.93 |
-06:57:50.2 |
HIP 79174 |
14.25 |
| 2026-02-04 12:00 |
16:10:05.58 |
-06:57:53.3 |
HIP 79174 |
16.47 |
| 2026-02-05 00:00 |
16:10:33.07 |
-06:57:55.2 |
HIP 79174 |
20.79 |
| 2026-02-05 12:00 |
16:11:00.42 |
-06:57:55.9 |
HIP 79174 |
26.16 |
| 2026-02-06 00:00 |
16:11:27.61 |
-06:57:55.5 |
HIP 79447 |
21.28 |
| 2026-02-06 12:00 |
16:11:54.65 |
-06:57:53.9 |
HIP 79447 |
15.17 |
| 2026-02-07 00:00 |
16:12:21.53 |
-06:57:51.2 |
HIP 79447 |
9.89 |
| 2026-02-07 12:00 |
16:12:48.25 |
-06:57:47.3 |
HIP 79447 |
7.37 |
| 2026-02-08 00:00 |
16:13:14.81 |
-06:57:42.2 |
HIP 79447 |
9.89 |
| 2026-02-08 12:00 |
16:13:41.21 |
-06:57:36.0 |
HIP 79545 |
4.41 |
| 2026-02-09 00:00 |
16:14:07.45 |
-06:57:28.6 |
HIP 79545 |
4.49 |
| 2026-02-09 12:00 |
16:14:33.52 |
-06:57:20.1 |
HIP 79545 |
10.23 |
| 2026-02-10 00:00 |
16:14:59.43 |
-06:57:10.4 |
HIP 79545 |
16.48 |
| 2026-02-10 12:00 |
16:15:25.17 |
-06:56:59.6 |
HIP 79545 |
22.79 |
| 2026-02-11 00:00 |
16:15:50.73 |
-06:56:47.6 |
HIP 79645 |
26.80 |
| 2026-02-11 12:00 |
16:16:16.13 |
-06:56:34.5 |
HIP 79821 |
23.90 |
| 2026-02-12 00:00 |
16:16:41.35 |
-06:56:20.2 |
HIP 79821 |
19.32 |
| 2026-02-12 12:00 |
16:17:06.40 |
-06:56:04.8 |
HIP 79821 |
15.93 |
| 2026-02-13 00:00 |
16:17:31.27 |
-06:55:48.2 |
HIP 79821 |
14.53 |
| 2026-02-13 12:00 |
16:17:55.97 |
-06:55:30.5 |
HIP 79821 |
15.62 |
| 2026-02-14 00:00 |
16:18:20.48 |
-06:55:11.7 |
HIP 79948 |
12.43 |
| 2026-02-14 12:00 |
16:18:44.81 |
-06:54:51.7 |
HIP 79948 |
6.53 |
| 2026-02-15 00:00 |
16:19:08.96 |
-06:54:30.6 |
HIP 79948 |
1.95 |
| 2026-02-15 12:00 |
16:19:32.92 |
-06:54:08.4 |
HIP 79948 |
6.04 |
| 2026-02-16 00:00 |
16:19:56.70 |
-06:53:45.1 |
HIP 79948 |
11.79 |
| 2026-02-16 12:00 |
16:20:20.28 |
-06:53:20.6 |
HIP 79948 |
17.61 |
| 2026-02-17 00:00 |
16:20:43.68 |
-06:52:55.0 |
HIP 80097 |
17.62 |
| 2026-02-17 12:00 |
16:21:06.89 |
-06:52:28.3 |
HIP 80097 |
16.70 |
| 2026-02-18 00:00 |
16:21:29.90 |
-06:52:00.6 |
HIP 80097 |
17.69 |
| 2026-02-18 12:00 |
16:21:52.72 |
-06:51:31.7 |
HIP 80097 |
20.26 |
| 2026-02-19 00:00 |
16:22:15.34 |
-06:51:01.7 |
HIP 80097 |
23.89 |
| 2026-02-19 12:00 |
16:22:37.76 |
-06:50:30.6 |
HIP 80248 |
22.68 |
| 2026-02-20 00:00 |
16:22:59.98 |
-06:49:58.4 |
HIP 80248 |
22.56 |
| 2026-02-20 12:00 |
16:23:22.00 |
-06:49:25.2 |
HIP 80248 |
23.78 |
| 2026-02-21 00:00 |
16:23:43.82 |
-06:48:50.9 |
HIP 80402 |
21.69 |
| 2026-02-21 12:00 |
16:24:05.43 |
-06:48:15.5 |
HIP 80402 |
18.09 |
| 2026-02-22 00:00 |
16:24:26.84 |
-06:47:39.0 |
HIP 80402 |
15.57 |
| 2026-02-22 12:00 |
16:24:48.04 |
-06:47:01.5 |
HIP 80402 |
14.62 |
| 2026-02-23 00:00 |
16:25:09.03 |
-06:46:22.9 |
HIP 80402 |
15.50 |
| 2026-02-23 12:00 |
16:25:29.81 |
-06:45:43.3 |
HIP 80509 |
14.18 |
| 2026-02-24 00:00 |
16:25:50.37 |
-06:45:02.7 |
HIP 80509 |
12.30 |