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
$$
M_a = (11.851 + 4.652\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.851 |
| n |
4.652 |
| gf |
0.910 |
| gb |
-0.898 |
| k |
1.000 |
| δ90 |
6.023 |
| 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 |
16:14:50.58 |
-17:32:32.9 |
HIP 79579 |
11.81 |
| 2026-07-29 12:00 |
16:14:46.76 |
-17:33:22.2 |
HIP 79579 |
11.69 |
| 2026-07-30 00:00 |
16:14:43.20 |
-17:34:12.1 |
HIP 79579 |
11.75 |
| 2026-07-30 12:00 |
16:14:39.91 |
-17:35:02.6 |
HIP 79579 |
11.97 |
| 2026-07-31 00:00 |
16:14:36.89 |
-17:35:53.8 |
HIP 79579 |
12.33 |
| 2026-07-31 12:00 |
16:14:34.14 |
-17:36:45.6 |
HIP 79579 |
12.81 |
| 2026-08-01 00:00 |
16:14:31.65 |
-17:37:38.0 |
HIP 79579 |
13.40 |
| 2026-08-01 12:00 |
16:14:29.43 |
-17:38:31.1 |
HIP 79579 |
14.07 |
| 2026-08-02 00:00 |
16:14:27.48 |
-17:39:24.8 |
HIP 79579 |
14.81 |
| 2026-08-02 12:00 |
16:14:25.79 |
-17:40:19.1 |
HIP 79579 |
15.60 |
| 2026-08-03 00:00 |
16:14:24.37 |
-17:41:14.0 |
HIP 79579 |
16.43 |
| 2026-08-03 12:00 |
16:14:23.22 |
-17:42:09.5 |
HIP 79579 |
17.30 |
| 2026-08-04 00:00 |
16:14:22.33 |
-17:43:05.7 |
HIP 79579 |
18.20 |
| 2026-08-04 12:00 |
16:14:21.72 |
-17:44:02.4 |
HIP 79579 |
19.12 |
| 2026-08-05 00:00 |
16:14:21.36 |
-17:44:59.8 |
HIP 79579 |
20.06 |
| 2026-08-05 12:00 |
16:14:21.28 |
-17:45:57.8 |
HIP 79579 |
21.02 |
| 2026-08-06 00:00 |
16:14:21.46 |
-17:46:56.4 |
HIP 79579 |
22.00 |
| 2026-08-06 12:00 |
16:14:21.91 |
-17:47:55.5 |
HIP 79579 |
22.99 |
| 2026-08-07 00:00 |
16:14:22.62 |
-17:48:55.3 |
HIP 79565 |
23.26 |
| 2026-08-07 12:00 |
16:14:23.61 |
-17:49:55.7 |
HIP 79565 |
22.31 |
| 2026-08-08 00:00 |
16:14:24.86 |
-17:50:56.6 |
HIP 79565 |
21.37 |
| 2026-08-08 12:00 |
16:14:26.37 |
-17:51:58.2 |
HIP 79565 |
20.46 |
| 2026-08-09 00:00 |
16:14:28.15 |
-17:53:00.3 |
HIP 79565 |
19.56 |
| 2026-08-09 12:00 |
16:14:30.20 |
-17:54:03.0 |
HIP 79565 |
18.70 |
| 2026-08-10 00:00 |
16:14:32.51 |
-17:55:06.3 |
HIP 79565 |
17.89 |
| 2026-08-10 12:00 |
16:14:35.09 |
-17:56:10.1 |
HIP 79565 |
17.14 |
| 2026-08-11 00:00 |
16:14:37.94 |
-17:57:14.6 |
HIP 79565 |
16.47 |
| 2026-08-11 12:00 |
16:14:41.05 |
-17:58:19.5 |
HIP 79565 |
15.89 |
| 2026-08-12 00:00 |
16:14:44.42 |
-17:59:25.1 |
HIP 79565 |
15.44 |
| 2026-08-12 12:00 |
16:14:48.06 |
-18:00:31.2 |
HIP 79565 |
15.13 |
| 2026-08-13 00:00 |
16:14:51.97 |
-18:01:37.8 |
HIP 79565 |
14.98 |
| 2026-08-13 12:00 |
16:14:56.13 |
-18:02:45.0 |
HIP 79565 |
15.02 |
| 2026-08-14 00:00 |
16:15:00.56 |
-18:03:52.7 |
HIP 79565 |
15.25 |
| 2026-08-14 12:00 |
16:15:05.26 |
-18:05:01.0 |
HIP 79565 |
15.69 |
| 2026-08-15 00:00 |
16:15:10.21 |
-18:06:09.8 |
HIP 79565 |
16.32 |
| 2026-08-15 12:00 |
16:15:15.43 |
-18:07:19.1 |
HIP 79565 |
17.15 |
| 2026-08-16 00:00 |
16:15:20.90 |
-18:08:28.9 |
HIP 79565 |
18.16 |
| 2026-08-16 12:00 |
16:15:26.64 |
-18:09:39.3 |
HIP 79565 |
19.33 |
| 2026-08-17 00:00 |
16:15:32.63 |
-18:10:50.1 |
HIP 79565 |
20.65 |
| 2026-08-17 12:00 |
16:15:38.89 |
-18:12:01.5 |
HIP 79565 |
22.11 |
| 2026-08-18 00:00 |
16:15:45.40 |
-18:13:13.3 |
HIP 79565 |
23.70 |
| 2026-08-18 12:00 |
16:15:52.17 |
-18:14:25.7 |
HIP 79732 |
22.51 |
| 2026-08-19 00:00 |
16:15:59.19 |
-18:15:38.5 |
HIP 79732 |
20.89 |