메타데이터
| 항목 |
값 |
| Designation |
C/2007 M1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-08-11T17:35:21.920640Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:12:21Z |
| Obs used |
232 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
9.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-10-11.0000000 |
| e |
0.99520236 |
| q (au) |
7.474661 |
| a (au) |
1557.985505 |
| i (deg) |
139.721499 |
| Ω (om, deg) |
326.808769 |
| ω (w, deg) |
52.635857 |
| M (ma, deg) |
0.000966 |
밝기
산란 + 전체 선형
$$
M_a = (4.972 + 4.027\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.972 |
| n |
4.027 |
| gf |
0.993 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.991 |
| 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) |
| 2026-03-26 00:00 |
10:10:40.62 |
+14:35:47.3 |
HIP 49866 |
7.82 |
| 2026-03-26 12:00 |
10:10:37.15 |
+14:35:59.8 |
HIP 49866 |
8.44 |
| 2026-03-27 00:00 |
10:10:33.70 |
+14:36:12.1 |
HIP 49866 |
9.09 |
| 2026-03-27 12:00 |
10:10:30.26 |
+14:36:24.3 |
HIP 49866 |
9.77 |
| 2026-03-28 00:00 |
10:10:26.85 |
+14:36:36.3 |
HIP 49866 |
10.47 |
| 2026-03-28 12:00 |
10:10:23.46 |
+14:36:48.2 |
HIP 49866 |
11.19 |
| 2026-03-29 00:00 |
10:10:20.09 |
+14:37:00.0 |
HIP 49866 |
11.92 |
| 2026-03-29 12:00 |
10:10:16.74 |
+14:37:11.6 |
HIP 49866 |
12.65 |
| 2026-03-30 00:00 |
10:10:13.41 |
+14:37:23.2 |
HIP 49866 |
13.40 |
| 2026-03-30 12:00 |
10:10:10.10 |
+14:37:34.5 |
HIP 49866 |
14.14 |
| 2026-03-31 00:00 |
10:10:06.82 |
+14:37:45.8 |
HIP 49866 |
14.89 |
| 2026-03-31 12:00 |
10:10:03.55 |
+14:37:56.8 |
HIP 49866 |
15.64 |
| 2026-04-01 00:00 |
10:10:00.31 |
+14:38:07.8 |
HIP 49866 |
16.39 |
| 2026-04-01 12:00 |
10:09:57.08 |
+14:38:18.6 |
HIP 49866 |
17.14 |
| 2026-04-02 00:00 |
10:09:53.88 |
+14:38:29.3 |
HIP 49866 |
17.89 |
| 2026-04-02 12:00 |
10:09:50.71 |
+14:38:39.8 |
HIP 49866 |
18.64 |
| 2026-04-03 00:00 |
10:09:47.55 |
+14:38:50.2 |
HIP 49866 |
19.38 |
| 2026-04-03 12:00 |
10:09:44.42 |
+14:39:00.5 |
HIP 49866 |
20.12 |
| 2026-04-04 00:00 |
10:09:41.31 |
+14:39:10.6 |
HIP 49866 |
20.86 |
| 2026-04-04 12:00 |
10:09:38.22 |
+14:39:20.5 |
HIP 49866 |
21.59 |
| 2026-04-05 00:00 |
10:09:35.15 |
+14:39:30.3 |
HIP 49866 |
22.32 |
| 2026-04-05 12:00 |
10:09:32.11 |
+14:39:40.0 |
HIP 49866 |
23.05 |
| 2026-04-06 00:00 |
10:09:29.09 |
+14:39:49.5 |
HIP 49866 |
23.77 |
| 2026-04-06 12:00 |
10:09:26.10 |
+14:39:58.9 |
HIP 49866 |
24.49 |
| 2026-04-07 00:00 |
10:09:23.13 |
+14:40:08.1 |
HIP 49866 |
25.20 |
| 2026-04-07 12:00 |
10:09:20.18 |
+14:40:17.2 |
HIP 49866 |
25.91 |
| 2026-04-08 00:00 |
10:09:17.26 |
+14:40:26.1 |
HIP 49866 |
26.61 |
| 2026-04-08 12:00 |
10:09:14.36 |
+14:40:34.9 |
HIP 49866 |
27.30 |
| 2026-04-09 00:00 |
10:09:11.48 |
+14:40:43.5 |
HIP 49866 |
27.99 |
| 2026-04-09 12:00 |
10:09:08.63 |
+14:40:52.0 |
HIP 49866 |
28.68 |
| 2026-04-10 00:00 |
10:09:05.81 |
+14:41:00.3 |
HIP 49866 |
29.36 |
| 2026-04-10 12:00 |
10:09:03.01 |
+14:41:08.5 |
HIP 49866 |
30.03 |
| 2026-04-11 00:00 |
10:09:00.24 |
+14:41:16.5 |
HIP 49866 |
30.70 |
| 2026-04-11 12:00 |
10:08:57.49 |
+14:41:24.4 |
HIP 49866 |
31.36 |
| 2026-04-12 00:00 |
10:08:54.76 |
+14:41:32.1 |
HIP 49866 |
32.02 |
| 2026-04-12 12:00 |
10:08:52.07 |
+14:41:39.7 |
HIP 49866 |
32.67 |
| 2026-04-13 00:00 |
10:08:49.39 |
+14:41:47.1 |
HIP 49623 |
32.44 |
| 2026-04-13 12:00 |
10:08:46.75 |
+14:41:54.3 |
HIP 49623 |
32.01 |
| 2026-04-14 00:00 |
10:08:44.13 |
+14:42:01.4 |
HIP 49623 |
31.59 |
| 2026-04-14 12:00 |
10:08:41.53 |
+14:42:08.3 |
HIP 49623 |
31.18 |
| 2026-04-15 00:00 |
10:08:38.97 |
+14:42:15.1 |
HIP 49623 |
30.79 |
| 2026-04-15 12:00 |
10:08:36.43 |
+14:42:21.7 |
HIP 49623 |
30.41 |
| 2026-04-16 00:00 |
10:08:33.91 |
+14:42:28.1 |
HIP 49623 |
30.04 |