메타데이터
| 항목 |
값 |
| Designation |
191P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-09-13T14:40:41.669760Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:39Z |
| Obs used |
787 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
8.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-02-25.0000000 |
| e |
0.42072245 |
| q (au) |
2.046442 |
| a (au) |
3.532749 |
| i (deg) |
8.759005 |
| Ω (om, deg) |
106.503897 |
| ω (w, deg) |
274.213416 |
| M (ma, deg) |
132.906520 |
밝기
산란 + 전체 선형
$$
M_a = (11.838 + 4.649\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.838 |
| n |
4.649 |
| gf |
0.918 |
| gb |
-0.898 |
| k |
1.000 |
| δ90 |
6.580 |
| 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) |
| 2026-03-26 00:00 |
17:10:23.42 |
-17:37:35.3 |
HIP 84064 |
12.26 |
| 2026-03-26 12:00 |
17:10:28.10 |
-17:37:27.8 |
HIP 84064 |
11.30 |
| 2026-03-27 00:00 |
17:10:32.54 |
-17:37:20.2 |
HIP 84064 |
10.43 |
| 2026-03-27 12:00 |
17:10:36.75 |
-17:37:12.3 |
HIP 84064 |
9.65 |
| 2026-03-28 00:00 |
17:10:40.72 |
-17:37:04.1 |
HIP 84064 |
8.96 |
| 2026-03-28 12:00 |
17:10:44.45 |
-17:36:55.8 |
HIP 84064 |
8.36 |
| 2026-03-29 00:00 |
17:10:47.94 |
-17:36:47.2 |
HIP 84064 |
7.87 |
| 2026-03-29 12:00 |
17:10:51.19 |
-17:36:38.3 |
HIP 84064 |
7.48 |
| 2026-03-30 00:00 |
17:10:54.20 |
-17:36:29.3 |
HIP 84064 |
7.19 |
| 2026-03-30 12:00 |
17:10:56.97 |
-17:36:20.0 |
HIP 84064 |
6.99 |
| 2026-03-31 00:00 |
17:10:59.49 |
-17:36:10.5 |
HIP 84064 |
6.88 |
| 2026-03-31 12:00 |
17:11:01.77 |
-17:36:00.7 |
HIP 84064 |
6.84 |
| 2026-04-01 00:00 |
17:11:03.81 |
-17:35:50.8 |
HIP 84064 |
6.87 |
| 2026-04-01 12:00 |
17:11:05.61 |
-17:35:40.6 |
HIP 84064 |
6.95 |
| 2026-04-02 00:00 |
17:11:07.16 |
-17:35:30.3 |
HIP 84064 |
7.07 |
| 2026-04-02 12:00 |
17:11:08.46 |
-17:35:19.7 |
HIP 84064 |
7.22 |
| 2026-04-03 00:00 |
17:11:09.52 |
-17:35:08.9 |
HIP 84064 |
7.39 |
| 2026-04-03 12:00 |
17:11:10.33 |
-17:34:58.0 |
HIP 84064 |
7.56 |
| 2026-04-04 00:00 |
17:11:10.89 |
-17:34:46.8 |
HIP 84064 |
7.75 |
| 2026-04-04 12:00 |
17:11:11.20 |
-17:34:35.4 |
HIP 84064 |
7.94 |
| 2026-04-05 00:00 |
17:11:11.27 |
-17:34:23.9 |
HIP 84064 |
8.13 |
| 2026-04-05 12:00 |
17:11:11.08 |
-17:34:12.1 |
HIP 84064 |
8.33 |
| 2026-04-06 00:00 |
17:11:10.64 |
-17:34:00.2 |
HIP 84064 |
8.53 |
| 2026-04-06 12:00 |
17:11:09.95 |
-17:33:48.1 |
HIP 84064 |
8.73 |
| 2026-04-07 00:00 |
17:11:09.01 |
-17:33:35.8 |
HIP 84064 |
8.94 |
| 2026-04-07 12:00 |
17:11:07.82 |
-17:33:23.3 |
HIP 84064 |
9.16 |
| 2026-04-08 00:00 |
17:11:06.38 |
-17:33:10.6 |
HIP 84064 |
9.40 |
| 2026-04-08 12:00 |
17:11:04.68 |
-17:32:57.8 |
HIP 84064 |
9.67 |
| 2026-04-09 00:00 |
17:11:02.73 |
-17:32:44.8 |
HIP 84064 |
9.96 |
| 2026-04-09 12:00 |
17:11:00.52 |
-17:32:31.7 |
HIP 84064 |
10.28 |
| 2026-04-10 00:00 |
17:10:58.06 |
-17:32:18.3 |
HIP 84064 |
10.65 |
| 2026-04-10 12:00 |
17:10:55.34 |
-17:32:04.9 |
HIP 84064 |
11.06 |
| 2026-04-11 00:00 |
17:10:52.37 |
-17:31:51.2 |
HIP 84064 |
11.52 |
| 2026-04-11 12:00 |
17:10:49.14 |
-17:31:37.4 |
HIP 84064 |
12.04 |
| 2026-04-12 00:00 |
17:10:45.66 |
-17:31:23.5 |
HIP 84064 |
12.62 |
| 2026-04-12 12:00 |
17:10:41.92 |
-17:31:09.4 |
HIP 84064 |
13.26 |
| 2026-04-13 00:00 |
17:10:37.92 |
-17:30:55.2 |
HIP 84064 |
13.97 |
| 2026-04-13 12:00 |
17:10:33.67 |
-17:30:40.8 |
HIP 84064 |
14.75 |
| 2026-04-14 00:00 |
17:10:29.15 |
-17:30:26.3 |
HIP 84064 |
15.60 |
| 2026-04-14 12:00 |
17:10:24.39 |
-17:30:11.7 |
HIP 84064 |
16.52 |
| 2026-04-15 00:00 |
17:10:19.36 |
-17:29:56.9 |
HIP 84064 |
17.52 |
| 2026-04-15 12:00 |
17:10:14.08 |
-17:29:42.1 |
HIP 83920 |
17.17 |
| 2026-04-16 00:00 |
17:10:08.54 |
-17:29:27.0 |
HIP 83920 |
15.98 |