메타데이터
| 항목 |
값 |
| Designation |
P/2024 OC2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-10-09T07:52:40.143360Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:19Z |
| Obs used |
43 |
| NEO |
Yes |
| M1 |
20.700 |
| K1 |
14.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-08-20.0000000 |
| e |
0.77423172 |
| q (au) |
0.592825 |
| a (au) |
2.625811 |
| i (deg) |
7.671223 |
| Ω (om, deg) |
136.619189 |
| ω (w, deg) |
258.539659 |
| M (ma, deg) |
348.342092 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-05-12 00:00 |
13:21:38.45 |
+01:02:02.7 |
HIP 65211 |
21.89 |
| 2026-05-12 12:00 |
13:21:19.32 |
+01:03:22.4 |
HIP 65211 |
21.79 |
| 2026-05-13 00:00 |
13:21:00.36 |
+01:04:40.5 |
HIP 65211 |
22.80 |
| 2026-05-13 12:00 |
13:20:41.59 |
+01:05:57.1 |
HIP 65211 |
24.75 |
| 2026-05-14 00:00 |
13:20:23.00 |
+01:07:12.0 |
HIP 65211 |
27.41 |
| 2026-05-14 12:00 |
13:20:04.60 |
+01:08:25.3 |
HIP 64930 |
24.79 |
| 2026-05-15 00:00 |
13:19:46.39 |
+01:09:37.0 |
HIP 64930 |
20.08 |
| 2026-05-15 12:00 |
13:19:28.37 |
+01:10:47.1 |
HIP 64930 |
15.43 |
| 2026-05-16 00:00 |
13:19:10.54 |
+01:11:55.6 |
HIP 64930 |
10.83 |
| 2026-05-16 12:00 |
13:18:52.91 |
+01:13:02.5 |
HIP 64930 |
6.29 |
| 2026-05-17 00:00 |
13:18:35.48 |
+01:14:07.7 |
HIP 64930 |
1.81 |
| 2026-05-17 12:00 |
13:18:18.25 |
+01:15:11.3 |
HIP 64930 |
2.66 |
| 2026-05-18 00:00 |
13:18:01.21 |
+01:16:13.3 |
HIP 64930 |
7.03 |
| 2026-05-18 12:00 |
13:17:44.38 |
+01:17:13.6 |
HIP 64930 |
11.36 |
| 2026-05-19 00:00 |
13:17:27.76 |
+01:18:12.3 |
HIP 64799 |
9.74 |
| 2026-05-19 12:00 |
13:17:11.33 |
+01:19:09.3 |
HIP 64799 |
6.79 |
| 2026-05-20 00:00 |
13:16:55.12 |
+01:20:04.7 |
HIP 64799 |
5.72 |
| 2026-05-20 12:00 |
13:16:39.11 |
+01:20:58.5 |
HIP 64799 |
7.29 |
| 2026-05-21 00:00 |
13:16:23.32 |
+01:21:50.6 |
HIP 64799 |
10.30 |
| 2026-05-21 12:00 |
13:16:07.73 |
+01:22:41.1 |
HIP 64799 |
13.79 |
| 2026-05-22 00:00 |
13:15:52.36 |
+01:23:30.0 |
HIP 64799 |
17.43 |
| 2026-05-22 12:00 |
13:15:37.19 |
+01:24:17.2 |
HIP 64799 |
21.11 |
| 2026-05-23 00:00 |
13:15:22.25 |
+01:25:02.8 |
HIP 64586 |
20.09 |
| 2026-05-23 12:00 |
13:15:07.51 |
+01:25:46.8 |
HIP 64556 |
17.55 |
| 2026-05-24 00:00 |
13:14:53.00 |
+01:26:29.2 |
HIP 64556 |
13.88 |
| 2026-05-24 12:00 |
13:14:38.70 |
+01:27:09.9 |
HIP 64556 |
10.27 |
| 2026-05-25 00:00 |
13:14:24.61 |
+01:27:49.0 |
HIP 64556 |
6.77 |
| 2026-05-25 12:00 |
13:14:10.75 |
+01:28:26.5 |
HIP 64556 |
3.45 |
| 2026-05-26 00:00 |
13:13:57.10 |
+01:29:02.4 |
HIP 64556 |
1.65 |
| 2026-05-26 12:00 |
13:13:43.68 |
+01:29:36.6 |
HIP 64556 |
4.13 |
| 2026-05-27 00:00 |
13:13:30.47 |
+01:30:09.3 |
HIP 64556 |
7.32 |
| 2026-05-27 12:00 |
13:13:17.48 |
+01:30:40.4 |
HIP 64556 |
10.55 |
| 2026-05-28 00:00 |
13:13:04.72 |
+01:31:09.8 |
HIP 64556 |
13.74 |
| 2026-05-28 12:00 |
13:12:52.17 |
+01:31:37.7 |
HIP 64556 |
16.89 |
| 2026-05-29 00:00 |
13:12:39.85 |
+01:32:04.0 |
HIP 64556 |
19.98 |
| 2026-05-29 12:00 |
13:12:27.75 |
+01:32:28.7 |
HIP 64556 |
23.02 |
| 2026-05-30 00:00 |
13:12:15.87 |
+01:32:51.9 |
HIP 64311 |
23.47 |
| 2026-05-30 12:00 |
13:12:04.22 |
+01:33:13.4 |
HIP 64311 |
20.74 |
| 2026-05-31 00:00 |
13:11:52.79 |
+01:33:33.4 |
HIP 64311 |
18.13 |
| 2026-05-31 12:00 |
13:11:41.58 |
+01:33:51.9 |
HIP 64311 |
15.68 |
| 2026-06-01 00:00 |
13:11:30.60 |
+01:34:08.8 |
HIP 64311 |
13.43 |
| 2026-06-01 12:00 |
13:11:19.84 |
+01:34:24.1 |
HIP 64311 |
11.45 |
| 2026-06-02 00:00 |
13:11:09.30 |
+01:34:37.9 |
HIP 64311 |
9.88 |