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) |
| 2026-09-20 00:00 |
00:40:15.00 |
-05:21:33.0 |
HIP 3222 |
48.78 |
| 2026-09-20 12:00 |
00:40:03.71 |
-05:23:01.8 |
HIP 2980 |
48.51 |
| 2026-09-21 00:00 |
00:39:52.39 |
-05:24:30.5 |
HIP 2980 |
45.57 |
| 2026-09-21 12:00 |
00:39:41.03 |
-05:25:58.9 |
HIP 2980 |
42.66 |
| 2026-09-22 00:00 |
00:39:29.65 |
-05:27:27.2 |
HIP 2980 |
39.80 |
| 2026-09-22 12:00 |
00:39:18.23 |
-05:28:55.2 |
HIP 2980 |
36.98 |
| 2026-09-23 00:00 |
00:39:06.78 |
-05:30:23.0 |
HIP 2980 |
34.24 |
| 2026-09-23 12:00 |
00:38:55.31 |
-05:31:50.6 |
HIP 2980 |
31.58 |
| 2026-09-24 00:00 |
00:38:43.81 |
-05:33:17.9 |
HIP 2980 |
29.03 |
| 2026-09-24 12:00 |
00:38:32.29 |
-05:34:45.0 |
HIP 2980 |
26.63 |
| 2026-09-25 00:00 |
00:38:20.74 |
-05:36:11.8 |
HIP 2980 |
24.41 |
| 2026-09-25 12:00 |
00:38:09.18 |
-05:37:38.3 |
HIP 2980 |
22.45 |
| 2026-09-26 00:00 |
00:37:57.59 |
-05:39:04.5 |
HIP 2980 |
20.80 |
| 2026-09-26 12:00 |
00:37:45.99 |
-05:40:30.5 |
HIP 2980 |
19.56 |
| 2026-09-27 00:00 |
00:37:34.37 |
-05:41:56.1 |
HIP 2980 |
18.79 |
| 2026-09-27 12:00 |
00:37:22.73 |
-05:43:21.4 |
HIP 2980 |
18.57 |
| 2026-09-28 00:00 |
00:37:11.09 |
-05:44:46.3 |
HIP 2980 |
18.92 |
| 2026-09-28 12:00 |
00:36:59.43 |
-05:46:11.0 |
HIP 2843 |
18.68 |
| 2026-09-29 00:00 |
00:36:47.76 |
-05:47:35.2 |
HIP 2843 |
17.60 |
| 2026-09-29 12:00 |
00:36:36.08 |
-05:48:59.1 |
HIP 2843 |
17.05 |
| 2026-09-30 00:00 |
00:36:24.39 |
-05:50:22.6 |
HIP 2843 |
17.11 |
| 2026-09-30 12:00 |
00:36:12.70 |
-05:51:45.8 |
HIP 2843 |
17.75 |
| 2026-10-01 00:00 |
00:36:01.01 |
-05:53:08.5 |
HIP 2785 |
16.99 |
| 2026-10-01 12:00 |
00:35:49.31 |
-05:54:30.9 |
HIP 2785 |
14.63 |
| 2026-10-02 00:00 |
00:35:37.61 |
-05:55:52.8 |
HIP 2785 |
12.67 |
| 2026-10-02 12:00 |
00:35:25.91 |
-05:57:14.3 |
HIP 2785 |
11.30 |
| 2026-10-03 00:00 |
00:35:14.22 |
-05:58:35.4 |
HIP 2785 |
10.75 |
| 2026-10-03 12:00 |
00:35:02.53 |
-05:59:56.0 |
HIP 2785 |
11.15 |
| 2026-10-04 00:00 |
00:34:50.84 |
-06:01:16.1 |
HIP 2785 |
12.39 |
| 2026-10-04 12:00 |
00:34:39.16 |
-06:02:35.8 |
HIP 2785 |
14.25 |
| 2026-10-05 00:00 |
00:34:27.50 |
-06:03:55.0 |
HIP 2785 |
16.53 |
| 2026-10-05 12:00 |
00:34:15.84 |
-06:05:13.7 |
HIP 2785 |
19.06 |
| 2026-10-06 00:00 |
00:34:04.19 |
-06:06:31.9 |
HIP 2785 |
21.77 |
| 2026-10-06 12:00 |
00:33:52.56 |
-06:07:49.6 |
HIP 2566 |
19.80 |
| 2026-10-07 00:00 |
00:33:40.94 |
-06:09:06.8 |
HIP 2566 |
16.70 |
| 2026-10-07 12:00 |
00:33:29.35 |
-06:10:23.5 |
HIP 2566 |
13.64 |
| 2026-10-08 00:00 |
00:33:17.77 |
-06:11:39.6 |
HIP 2566 |
10.64 |
| 2026-10-08 12:00 |
00:33:06.21 |
-06:12:55.1 |
HIP 2566 |
7.75 |
| 2026-10-09 00:00 |
00:32:54.67 |
-06:14:10.1 |
HIP 2566 |
5.17 |
| 2026-10-09 12:00 |
00:32:43.16 |
-06:15:24.5 |
HIP 2566 |
3.60 |
| 2026-10-10 00:00 |
00:32:31.68 |
-06:16:38.3 |
HIP 2566 |
4.30 |
| 2026-10-10 12:00 |
00:32:20.22 |
-06:17:51.5 |
HIP 2566 |
6.57 |
| 2026-10-11 00:00 |
00:32:08.79 |
-06:19:04.1 |
HIP 2566 |
9.32 |