401P/McNaught
메타데이터
| 항목 |
값 |
| Designation |
401P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-05-07T16:51:22.184640Z |
| Orbit solution date (soln_date, UTC) |
2024-06-03T15:49:51Z |
| Obs used |
268 |
| NEO |
- |
| M1 |
10.700 |
| K1 |
15.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-09-19.0000000 |
| e |
0.58200168 |
| q (au) |
2.379587 |
| a (au) |
5.692815 |
| i (deg) |
12.865037 |
| Ω (om, deg) |
0.095844 |
| ω (w, deg) |
310.243129 |
| M (ma, deg) |
62.788339 |
밝기
산란 + 전체 선형
$$
M_a = (12.058 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.058 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.588 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
08:29:45.48 |
+31:23:01.0 |
HIP 41682 |
1.32 |
| 2026-02-03 12:00 |
08:29:32.28 |
+31:23:28.6 |
HIP 41682 |
4.05 |
| 2026-02-04 00:00 |
08:29:19.12 |
+31:23:55.6 |
HIP 41682 |
6.87 |
| 2026-02-04 12:00 |
08:29:05.98 |
+31:24:22.0 |
HIP 41682 |
9.70 |
| 2026-02-05 00:00 |
08:28:52.88 |
+31:24:47.9 |
HIP 41682 |
12.52 |
| 2026-02-05 12:00 |
08:28:39.80 |
+31:25:13.1 |
HIP 41682 |
15.34 |
| 2026-02-06 00:00 |
08:28:26.76 |
+31:25:37.8 |
HIP 41682 |
18.15 |
| 2026-02-06 12:00 |
08:28:13.76 |
+31:26:01.8 |
HIP 41682 |
20.95 |
| 2026-02-07 00:00 |
08:28:00.79 |
+31:26:25.3 |
HIP 41682 |
23.74 |
| 2026-02-07 12:00 |
08:27:47.86 |
+31:26:48.2 |
HIP 41682 |
26.52 |
| 2026-02-08 00:00 |
08:27:34.98 |
+31:27:10.4 |
HIP 41682 |
29.29 |
| 2026-02-08 12:00 |
08:27:22.13 |
+31:27:32.1 |
HIP 41682 |
32.05 |
| 2026-02-09 00:00 |
08:27:09.33 |
+31:27:53.2 |
HIP 41292 |
32.90 |
| 2026-02-09 12:00 |
08:26:56.58 |
+31:28:13.6 |
HIP 41292 |
31.46 |
| 2026-02-10 00:00 |
08:26:43.87 |
+31:28:33.5 |
HIP 41292 |
30.19 |
| 2026-02-10 12:00 |
08:26:31.21 |
+31:28:52.7 |
HIP 41292 |
29.13 |
| 2026-02-11 00:00 |
08:26:18.60 |
+31:29:11.3 |
HIP 41292 |
28.29 |
| 2026-02-11 12:00 |
08:26:06.04 |
+31:29:29.3 |
HIP 41292 |
27.68 |
| 2026-02-12 00:00 |
08:25:53.54 |
+31:29:46.7 |
HIP 41172 |
25.79 |
| 2026-02-12 12:00 |
08:25:41.09 |
+31:30:03.5 |
HIP 41172 |
23.59 |
| 2026-02-13 00:00 |
08:25:28.70 |
+31:30:19.6 |
HIP 41172 |
21.51 |
| 2026-02-13 12:00 |
08:25:16.37 |
+31:30:35.2 |
HIP 41172 |
19.57 |
| 2026-02-14 00:00 |
08:25:04.10 |
+31:30:50.1 |
HIP 41172 |
17.81 |
| 2026-02-14 12:00 |
08:24:51.89 |
+31:31:04.3 |
HIP 41172 |
16.30 |
| 2026-02-15 00:00 |
08:24:39.74 |
+31:31:18.0 |
HIP 41172 |
15.08 |
| 2026-02-15 12:00 |
08:24:27.66 |
+31:31:31.0 |
HIP 41172 |
14.23 |
| 2026-02-16 00:00 |
08:24:15.64 |
+31:31:43.4 |
HIP 41172 |
13.82 |
| 2026-02-16 12:00 |
08:24:03.69 |
+31:31:55.2 |
HIP 41172 |
13.87 |
| 2026-02-17 00:00 |
08:23:51.81 |
+31:32:06.3 |
HIP 41086 |
11.92 |
| 2026-02-17 12:00 |
08:23:40.00 |
+31:32:16.9 |
HIP 41086 |
9.46 |
| 2026-02-18 00:00 |
08:23:28.27 |
+31:32:26.8 |
HIP 41086 |
7.05 |
| 2026-02-18 12:00 |
08:23:16.60 |
+31:32:36.0 |
HIP 41086 |
4.76 |
| 2026-02-19 00:00 |
08:23:05.02 |
+31:32:44.6 |
HIP 41086 |
2.85 |
| 2026-02-19 12:00 |
08:22:53.50 |
+31:32:52.6 |
HIP 41086 |
2.42 |
| 2026-02-20 00:00 |
08:22:42.07 |
+31:33:00.0 |
HIP 41086 |
3.95 |
| 2026-02-20 12:00 |
08:22:30.72 |
+31:33:06.8 |
HIP 41086 |
6.08 |
| 2026-02-21 00:00 |
08:22:19.45 |
+31:33:12.9 |
HIP 41086 |
8.36 |
| 2026-02-21 12:00 |
08:22:08.26 |
+31:33:18.4 |
HIP 41086 |
10.68 |
| 2026-02-22 00:00 |
08:21:57.15 |
+31:33:23.2 |
HIP 41086 |
13.01 |
| 2026-02-22 12:00 |
08:21:46.13 |
+31:33:27.4 |
HIP 41086 |
15.33 |
| 2026-02-23 00:00 |
08:21:35.19 |
+31:33:31.0 |
HIP 41086 |
17.64 |
| 2026-02-23 12:00 |
08:21:24.35 |
+31:33:34.0 |
HIP 41086 |
19.94 |
| 2026-02-24 00:00 |
08:21:13.59 |
+31:33:36.4 |
HIP 41086 |
22.22 |