메타데이터
| 항목 |
값 |
| Designation |
P/2012 O1 (McNaught) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-07-23T21:45:24.840000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:19Z |
| Obs used |
98 |
| NEO |
- |
| M1 |
18.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-08-23.0000000 |
| e |
0.57924394 |
| q (au) |
1.499146 |
| a (au) |
3.562980 |
| i (deg) |
11.428578 |
| Ω (om, deg) |
111.278961 |
| ω (w, deg) |
222.109887 |
| M (ma, deg) |
4.410178 |
밝기
산란 + 전체 선형
$$
M_a = (17.186 + 4.986\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.186 |
| n |
4.986 |
| gf |
1.000 |
| gb |
-0.758 |
| k |
0.973 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
06:08:38.97 |
+22:17:55.7 |
HIP 29196 |
13.98 |
| 2026-07-29 12:00 |
06:09:22.39 |
+22:18:12.9 |
HIP 29196 |
7.19 |
| 2026-07-30 00:00 |
06:10:05.68 |
+22:18:29.4 |
HIP 29196 |
10.45 |
| 2026-07-30 12:00 |
06:10:48.83 |
+22:18:45.2 |
HIP 29296 |
16.72 |
| 2026-07-31 00:00 |
06:11:31.86 |
+22:19:00.2 |
HIP 29342 |
19.73 |
| 2026-07-31 12:00 |
06:12:14.75 |
+22:19:14.5 |
HIP 29342 |
23.78 |
| 2026-08-01 00:00 |
06:12:57.50 |
+22:19:28.2 |
HIP 29655 |
28.78 |
| 2026-08-01 12:00 |
06:13:40.12 |
+22:19:41.1 |
HIP 29655 |
19.91 |
| 2026-08-02 00:00 |
06:14:22.61 |
+22:19:53.3 |
HIP 29687 |
12.35 |
| 2026-08-02 12:00 |
06:15:04.96 |
+22:20:04.8 |
HIP 29687 |
3.15 |
| 2026-08-03 00:00 |
06:15:47.17 |
+22:20:15.7 |
HIP 29689 |
7.32 |
| 2026-08-03 12:00 |
06:16:29.25 |
+22:20:25.9 |
HIP 29827 |
11.50 |
| 2026-08-04 00:00 |
06:17:11.19 |
+22:20:35.4 |
HIP 29827 |
11.24 |
| 2026-08-04 12:00 |
06:17:52.99 |
+22:20:44.3 |
HIP 29867 |
14.26 |
| 2026-08-05 00:00 |
06:18:34.65 |
+22:20:52.5 |
HIP 29968 |
19.89 |
| 2026-08-05 12:00 |
06:19:16.17 |
+22:21:00.1 |
HIP 30075 |
15.85 |
| 2026-08-06 00:00 |
06:19:57.55 |
+22:21:07.0 |
HIP 30075 |
14.75 |
| 2026-08-06 12:00 |
06:20:38.79 |
+22:21:13.4 |
HIP 30075 |
19.13 |
| 2026-08-07 00:00 |
06:21:19.89 |
+22:21:19.1 |
HIP 30268 |
15.78 |
| 2026-08-07 12:00 |
06:22:00.84 |
+22:21:24.2 |
HIP 30268 |
12.46 |
| 2026-08-08 00:00 |
06:22:41.65 |
+22:21:28.7 |
HIP 30343 |
10.05 |
| 2026-08-08 12:00 |
06:23:22.32 |
+22:21:32.7 |
HIP 30343 |
10.90 |
| 2026-08-09 00:00 |
06:24:02.84 |
+22:21:36.0 |
HIP 30343 |
17.68 |
| 2026-08-09 12:00 |
06:24:43.21 |
+22:21:38.8 |
HIP 30574 |
13.14 |
| 2026-08-10 00:00 |
06:25:23.44 |
+22:21:41.0 |
HIP 30574 |
6.30 |
| 2026-08-10 12:00 |
06:26:03.51 |
+22:21:42.6 |
HIP 30574 |
8.89 |
| 2026-08-11 00:00 |
06:26:43.44 |
+22:21:43.8 |
HIP 30574 |
17.00 |
| 2026-08-11 12:00 |
06:27:23.21 |
+22:21:44.3 |
HIP 30723 |
22.36 |
| 2026-08-12 00:00 |
06:28:02.84 |
+22:21:44.4 |
HIP 30723 |
24.80 |
| 2026-08-12 12:00 |
06:28:42.31 |
+22:21:43.9 |
HIP 31000 |
25.48 |
| 2026-08-13 00:00 |
06:29:21.62 |
+22:21:42.9 |
HIP 31000 |
17.73 |
| 2026-08-13 12:00 |
06:30:00.79 |
+22:21:41.4 |
HIP 31000 |
12.04 |
| 2026-08-14 00:00 |
06:30:39.79 |
+22:21:39.5 |
HIP 31000 |
11.79 |
| 2026-08-14 12:00 |
06:31:18.65 |
+22:21:37.0 |
HIP 31139 |
14.10 |
| 2026-08-15 00:00 |
06:31:57.34 |
+22:21:34.1 |
HIP 31139 |
10.43 |
| 2026-08-15 12:00 |
06:32:35.88 |
+22:21:30.7 |
HIP 31139 |
13.36 |
| 2026-08-16 00:00 |
06:33:14.25 |
+22:21:26.8 |
HIP 31308 |
10.02 |
| 2026-08-16 12:00 |
06:33:52.47 |
+22:21:22.5 |
HIP 31308 |
1.49 |
| 2026-08-17 00:00 |
06:34:30.53 |
+22:21:17.8 |
HIP 31308 |
7.72 |
| 2026-08-17 12:00 |
06:35:08.42 |
+22:21:12.6 |
HIP 31308 |
16.45 |
| 2026-08-18 00:00 |
06:35:46.15 |
+22:21:07.0 |
HIP 31308 |
25.17 |
| 2026-08-18 12:00 |
06:36:23.72 |
+22:21:01.1 |
HIP 31651 |
19.40 |
| 2026-08-19 00:00 |
06:37:01.13 |
+22:20:54.7 |
HIP 31651 |
13.64 |