메타데이터
| 항목 |
값 |
| Designation |
P/2022 C2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-08-06T14:14:16.523520Z |
| Orbit solution date (soln_date, UTC) |
2023-11-12T20:43:31Z |
| Obs used |
255 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
18.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-02-02T13:07:46.243200Z |
| Discovery magnitude (MPC) |
20.84 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-04-22.0000000 |
| e |
0.44280537 |
| q (au) |
3.370418 |
| a (au) |
6.048907 |
| i (deg) |
9.979754 |
| Ω (om, deg) |
135.274414 |
| ω (w, deg) |
89.300280 |
| M (ma, deg) |
352.938151 |
밝기
산란 + 전체 선형
$$
M_a = (7.861 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.861 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.869 |
| k |
1.000 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
00:52:35.68 |
-03:04:08.5 |
HIP 4021 |
16.34 |
| 2026-07-29 12:00 |
00:52:34.49 |
-03:04:59.1 |
HIP 4021 |
15.84 |
| 2026-07-30 00:00 |
00:52:33.17 |
-03:05:50.4 |
HIP 4021 |
15.35 |
| 2026-07-30 12:00 |
00:52:31.73 |
-03:06:42.5 |
HIP 4021 |
14.86 |
| 2026-07-31 00:00 |
00:52:30.16 |
-03:07:35.2 |
HIP 4021 |
14.38 |
| 2026-07-31 12:00 |
00:52:28.46 |
-03:08:28.7 |
HIP 4021 |
13.93 |
| 2026-08-01 00:00 |
00:52:26.64 |
-03:09:22.9 |
HIP 4021 |
13.49 |
| 2026-08-01 12:00 |
00:52:24.70 |
-03:10:17.9 |
HIP 4021 |
13.10 |
| 2026-08-02 00:00 |
00:52:22.63 |
-03:11:13.5 |
HIP 4021 |
12.75 |
| 2026-08-02 12:00 |
00:52:20.44 |
-03:12:09.8 |
HIP 4021 |
12.45 |
| 2026-08-03 00:00 |
00:52:18.12 |
-03:13:06.9 |
HIP 4021 |
12.21 |
| 2026-08-03 12:00 |
00:52:15.68 |
-03:14:04.7 |
HIP 4021 |
12.06 |
| 2026-08-04 00:00 |
00:52:13.11 |
-03:15:03.1 |
HIP 4021 |
11.99 |
| 2026-08-04 12:00 |
00:52:10.42 |
-03:16:02.3 |
HIP 4021 |
12.01 |
| 2026-08-05 00:00 |
00:52:07.61 |
-03:17:02.1 |
HIP 4021 |
12.14 |
| 2026-08-05 12:00 |
00:52:04.67 |
-03:18:02.6 |
HIP 4021 |
12.38 |
| 2026-08-06 00:00 |
00:52:01.60 |
-03:19:03.8 |
HIP 4021 |
12.72 |
| 2026-08-06 12:00 |
00:51:58.42 |
-03:20:05.7 |
HIP 4021 |
13.18 |
| 2026-08-07 00:00 |
00:51:55.11 |
-03:21:08.3 |
HIP 4021 |
13.74 |
| 2026-08-07 12:00 |
00:51:51.68 |
-03:22:11.5 |
HIP 4021 |
14.41 |
| 2026-08-08 00:00 |
00:51:48.12 |
-03:23:15.4 |
HIP 4021 |
15.17 |
| 2026-08-08 12:00 |
00:51:44.44 |
-03:24:19.9 |
HIP 4021 |
16.02 |
| 2026-08-09 00:00 |
00:51:40.64 |
-03:25:25.1 |
HIP 4021 |
16.95 |
| 2026-08-09 12:00 |
00:51:36.72 |
-03:26:30.9 |
HIP 4021 |
17.96 |
| 2026-08-10 00:00 |
00:51:32.67 |
-03:27:37.4 |
HIP 4021 |
19.04 |
| 2026-08-10 12:00 |
00:51:28.50 |
-03:28:44.5 |
HIP 4021 |
20.18 |
| 2026-08-11 00:00 |
00:51:24.21 |
-03:29:52.2 |
HIP 4021 |
21.39 |
| 2026-08-11 12:00 |
00:51:19.81 |
-03:31:00.6 |
HIP 4021 |
22.65 |
| 2026-08-12 00:00 |
00:51:15.28 |
-03:32:09.5 |
HIP 4021 |
23.97 |
| 2026-08-12 12:00 |
00:51:10.63 |
-03:33:19.1 |
HIP 4021 |
25.34 |
| 2026-08-13 00:00 |
00:51:05.86 |
-03:34:29.3 |
HIP 4021 |
26.75 |
| 2026-08-13 12:00 |
00:51:00.97 |
-03:35:40.0 |
HIP 4021 |
28.21 |
| 2026-08-14 00:00 |
00:50:55.97 |
-03:36:51.4 |
HIP 4021 |
29.72 |
| 2026-08-14 12:00 |
00:50:50.84 |
-03:38:03.3 |
HIP 4040 |
30.77 |
| 2026-08-15 00:00 |
00:50:45.60 |
-03:39:15.8 |
HIP 4040 |
30.36 |
| 2026-08-15 12:00 |
00:50:40.25 |
-03:40:28.8 |
HIP 4040 |
30.07 |
| 2026-08-16 00:00 |
00:50:34.78 |
-03:41:42.4 |
HIP 4040 |
29.90 |
| 2026-08-16 12:00 |
00:50:29.19 |
-03:42:56.5 |
HIP 4040 |
29.85 |
| 2026-08-17 00:00 |
00:50:23.49 |
-03:44:11.2 |
HIP 4040 |
29.93 |
| 2026-08-17 12:00 |
00:50:17.67 |
-03:45:26.4 |
HIP 4040 |
30.14 |
| 2026-08-18 00:00 |
00:50:11.74 |
-03:46:42.1 |
HIP 4040 |
30.49 |
| 2026-08-18 12:00 |
00:50:05.70 |
-03:47:58.3 |
HIP 3746 |
30.84 |
| 2026-08-19 00:00 |
00:49:59.55 |
-03:49:15.1 |
HIP 3746 |
29.58 |