| Parameter |
Value |
| Designation |
P/2022 P2 (ZTF) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-10T18:54:03.015360Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:43:02Z |
| Obs used |
162 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
21.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-08-15T12:02:27.830400Z |
| Discovery magnitude (MPC) |
18.50 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-22.0000000 |
| e |
0.55792224 |
| q (au) |
1.982270 |
| a (au) |
4.483984 |
| i (deg) |
12.442878 |
| Ω (om, deg) |
291.231134 |
| ω (w, deg) |
137.589908 |
| M (ma, deg) |
10.713716 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.163 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.163 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
15:22:18.44 |
-30:34:58.9 |
HIP 75276 |
12.32 |
| 2026-06-01 12:00 |
15:22:03.09 |
-30:33:40.6 |
HIP 75276 |
13.27 |
| 2026-06-02 00:00 |
15:21:47.82 |
-30:32:21.9 |
HIP 75276 |
15.01 |
| 2026-06-02 12:00 |
15:21:32.62 |
-30:31:02.8 |
HIP 75276 |
17.29 |
| 2026-06-03 00:00 |
15:21:17.51 |
-30:29:43.4 |
HIP 75276 |
19.92 |
| 2026-06-03 12:00 |
15:21:02.48 |
-30:28:23.7 |
HIP 75276 |
22.77 |
| 2026-06-04 00:00 |
15:20:47.54 |
-30:27:03.6 |
HIP 75035 |
23.40 |
| 2026-06-04 12:00 |
15:20:32.68 |
-30:25:43.3 |
HIP 75035 |
20.83 |
| 2026-06-05 00:00 |
15:20:17.91 |
-30:24:22.7 |
HIP 75035 |
18.55 |
| 2026-06-05 12:00 |
15:20:03.23 |
-30:23:01.8 |
HIP 75035 |
16.68 |
| 2026-06-06 00:00 |
15:19:48.64 |
-30:21:40.6 |
HIP 75035 |
15.36 |
| 2026-06-06 12:00 |
15:19:34.14 |
-30:20:19.1 |
HIP 75035 |
14.73 |
| 2026-06-07 00:00 |
15:19:19.74 |
-30:18:57.4 |
HIP 75035 |
14.86 |
| 2026-06-07 12:00 |
15:19:05.43 |
-30:17:35.5 |
HIP 75035 |
15.72 |
| 2026-06-08 00:00 |
15:18:51.23 |
-30:16:13.4 |
HIP 74857 |
15.14 |
| 2026-06-08 12:00 |
15:18:37.12 |
-30:14:51.0 |
HIP 74857 |
11.81 |
| 2026-06-09 00:00 |
15:18:23.11 |
-30:13:28.5 |
HIP 74857 |
8.51 |
| 2026-06-09 12:00 |
15:18:09.21 |
-30:12:05.7 |
HIP 74857 |
5.25 |
| 2026-06-10 00:00 |
15:17:55.42 |
-30:10:42.8 |
HIP 74857 |
2.16 |
| 2026-06-10 12:00 |
15:17:41.73 |
-30:09:19.7 |
HIP 74857 |
1.80 |
| 2026-06-11 00:00 |
15:17:28.15 |
-30:07:56.4 |
HIP 74857 |
4.79 |
| 2026-06-11 12:00 |
15:17:14.67 |
-30:06:33.1 |
HIP 74857 |
7.97 |
| 2026-06-12 00:00 |
15:17:01.32 |
-30:05:09.5 |
HIP 74857 |
11.15 |
| 2026-06-12 12:00 |
15:16:48.07 |
-30:03:45.9 |
HIP 74857 |
14.32 |
| 2026-06-13 00:00 |
15:16:34.94 |
-30:02:22.2 |
HIP 74857 |
17.48 |
| 2026-06-13 12:00 |
15:16:21.93 |
-30:00:58.3 |
HIP 74857 |
20.61 |
| 2026-06-14 00:00 |
15:16:09.03 |
-29:59:34.4 |
HIP 74857 |
23.73 |
| 2026-06-14 12:00 |
15:15:56.26 |
-29:58:10.4 |
HIP 74721 |
23.10 |
| 2026-06-15 00:00 |
15:15:43.60 |
-29:56:46.4 |
HIP 74721 |
22.33 |
| 2026-06-15 12:00 |
15:15:31.07 |
-29:55:22.3 |
HIP 74721 |
21.95 |
| 2026-06-16 00:00 |
15:15:18.66 |
-29:53:58.2 |
HIP 74721 |
21.98 |
| 2026-06-16 12:00 |
15:15:06.38 |
-29:52:34.1 |
HIP 74521 |
20.09 |
| 2026-06-17 00:00 |
15:14:54.23 |
-29:51:09.9 |
HIP 74521 |
17.14 |
| 2026-06-17 12:00 |
15:14:42.20 |
-29:49:45.8 |
HIP 74521 |
14.22 |
| 2026-06-18 00:00 |
15:14:30.31 |
-29:48:21.6 |
HIP 74521 |
11.35 |
| 2026-06-18 12:00 |
15:14:18.55 |
-29:46:57.5 |
HIP 74521 |
8.55 |
| 2026-06-19 00:00 |
15:14:06.91 |
-29:45:33.5 |
HIP 74521 |
5.89 |
| 2026-06-19 12:00 |
15:13:55.42 |
-29:44:09.5 |
HIP 74521 |
3.63 |
| 2026-06-20 00:00 |
15:13:44.05 |
-29:42:45.5 |
HIP 74521 |
2.84 |
| 2026-06-20 12:00 |
15:13:32.82 |
-29:41:21.7 |
HIP 74521 |
4.35 |
| 2026-06-21 00:00 |
15:13:21.73 |
-29:39:57.9 |
HIP 74521 |
6.73 |
| 2026-06-21 12:00 |
15:13:10.78 |
-29:38:34.2 |
HIP 74521 |
9.32 |
| 2026-06-22 00:00 |
15:12:59.96 |
-29:37:10.6 |
HIP 74521 |
11.96 |