메타데이터
| 항목 |
값 |
| Designation |
353P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-12-22T00:55:05.024640Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:56Z |
| Obs used |
126 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
12.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-12-12.0000000 |
| e |
0.46877362 |
| q (au) |
2.212902 |
| a (au) |
4.165647 |
| i (deg) |
28.415165 |
| Ω (om, deg) |
121.588906 |
| ω (w, deg) |
230.495742 |
| M (ma, deg) |
189.468601 |
밝기
산란 + 전체 선형
$$
M_a = (16.869 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.869 |
| n |
2.000 |
| gf |
0.953 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
9.775 |
| 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 |
02:28:20.98 |
-16:33:49.4 |
HIP 11374 |
28.58 |
| 2026-07-29 12:00 |
02:29:07.98 |
-16:37:42.8 |
HIP 11632 |
25.11 |
| 2026-07-30 00:00 |
02:29:54.73 |
-16:41:38.7 |
HIP 11632 |
17.22 |
| 2026-07-30 12:00 |
02:30:41.23 |
-16:45:37.0 |
HIP 11632 |
15.55 |
| 2026-07-31 00:00 |
02:31:27.48 |
-16:49:37.8 |
HIP 11729 |
9.46 |
| 2026-07-31 12:00 |
02:32:13.47 |
-16:53:41.0 |
HIP 11729 |
12.67 |
| 2026-08-01 00:00 |
02:32:59.20 |
-16:57:46.6 |
HIP 11729 |
22.44 |
| 2026-08-01 12:00 |
02:33:44.67 |
-17:01:54.6 |
HIP 12023 |
24.49 |
| 2026-08-02 00:00 |
02:34:29.88 |
-17:06:05.1 |
HIP 12023 |
13.95 |
| 2026-08-02 12:00 |
02:35:14.82 |
-17:10:18.0 |
HIP 12023 |
7.52 |
| 2026-08-03 00:00 |
02:35:59.49 |
-17:14:33.2 |
HIP 12140 |
9.50 |
| 2026-08-03 12:00 |
02:36:43.89 |
-17:18:50.9 |
HIP 12174 |
5.18 |
| 2026-08-04 00:00 |
02:37:28.01 |
-17:23:11.0 |
HIP 12174 |
8.55 |
| 2026-08-04 12:00 |
02:38:11.86 |
-17:27:33.4 |
HIP 12275 |
4.41 |
| 2026-08-05 00:00 |
02:38:55.42 |
-17:31:58.2 |
HIP 12275 |
11.57 |
| 2026-08-05 12:00 |
02:39:38.70 |
-17:36:25.3 |
HIP 12482 |
20.02 |
| 2026-08-06 00:00 |
02:40:21.69 |
-17:40:54.9 |
HIP 12528 |
14.73 |
| 2026-08-06 12:00 |
02:41:04.39 |
-17:45:26.7 |
HIP 12528 |
4.30 |
| 2026-08-07 00:00 |
02:41:46.79 |
-17:50:00.9 |
HIP 12528 |
8.17 |
| 2026-08-07 12:00 |
02:42:28.90 |
-17:54:37.4 |
HIP 12528 |
18.93 |
| 2026-08-08 00:00 |
02:43:10.71 |
-17:59:16.1 |
HIP 12755 |
24.73 |
| 2026-08-08 12:00 |
02:43:52.21 |
-18:03:57.2 |
HIP 12755 |
17.58 |
| 2026-08-09 00:00 |
02:44:33.40 |
-18:08:40.5 |
HIP 12755 |
15.56 |
| 2026-08-09 12:00 |
02:45:14.28 |
-18:13:26.1 |
HIP 12755 |
20.19 |
| 2026-08-10 00:00 |
02:45:54.85 |
-18:18:13.9 |
HIP 12951 |
18.26 |
| 2026-08-10 12:00 |
02:46:35.11 |
-18:23:04.0 |
HIP 13048 |
15.60 |
| 2026-08-11 00:00 |
02:47:15.04 |
-18:27:56.2 |
HIP 13048 |
10.51 |
| 2026-08-11 12:00 |
02:47:54.65 |
-18:32:50.6 |
HIP 13087 |
9.36 |
| 2026-08-12 00:00 |
02:48:33.93 |
-18:37:47.1 |
HIP 13087 |
5.62 |
| 2026-08-12 12:00 |
02:49:12.88 |
-18:42:45.7 |
HIP 13087 |
13.98 |
| 2026-08-13 00:00 |
02:49:51.50 |
-18:47:46.5 |
HIP 13130 |
19.46 |
| 2026-08-13 12:00 |
02:50:29.79 |
-18:52:49.3 |
HIP 13130 |
24.36 |
| 2026-08-14 00:00 |
02:51:07.73 |
-18:57:54.2 |
HIP 13130 |
31.89 |
| 2026-08-14 12:00 |
02:51:45.34 |
-19:03:01.0 |
HIP 13415 |
38.84 |
| 2026-08-15 00:00 |
02:52:22.60 |
-19:08:09.9 |
HIP 13415 |
41.69 |
| 2026-08-15 12:00 |
02:52:59.52 |
-19:13:20.7 |
HIP 13639 |
37.74 |
| 2026-08-16 00:00 |
02:53:36.08 |
-19:18:33.5 |
HIP 13639 |
30.54 |
| 2026-08-16 12:00 |
02:54:12.30 |
-19:23:48.2 |
HIP 13639 |
25.47 |
| 2026-08-17 00:00 |
02:54:48.16 |
-19:29:04.7 |
HIP 13647 |
20.75 |
| 2026-08-17 12:00 |
02:55:23.66 |
-19:34:23.1 |
HIP 13647 |
11.87 |
| 2026-08-18 00:00 |
02:55:58.80 |
-19:39:43.3 |
HIP 13647 |
6.83 |
| 2026-08-18 12:00 |
02:56:33.58 |
-19:45:05.3 |
HIP 13647 |
12.00 |
| 2026-08-19 00:00 |
02:57:08.00 |
-19:50:29.1 |
HIP 13647 |
20.72 |