메타데이터
| 항목 |
값 |
| Designation |
C/2006 M4 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-09-28T17:29:02.883840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:58Z |
| Obs used |
1265 |
| NEO |
- |
| M1 |
11.000 |
| K1 |
7.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-11-10.0000000 |
| e |
1.00018505 |
| q (au) |
0.783008 |
| a (au) |
-4231.355299 |
| i (deg) |
111.823262 |
| Ω (om, deg) |
148.726842 |
| ω (w, deg) |
62.594371 |
| M (ma, deg) |
0.000151 |
밝기
산란 + 전체 선형
$$
M_a = (6.701 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.701 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
21:58:46.80 |
-59:22:51.8 |
HIP 108584 |
13.73 |
| 2026-07-29 12:00 |
21:58:41.72 |
-59:23:14.4 |
HIP 108344 |
13.71 |
| 2026-07-30 00:00 |
21:58:36.62 |
-59:23:36.8 |
HIP 108344 |
12.97 |
| 2026-07-30 12:00 |
21:58:31.51 |
-59:23:59.0 |
HIP 108344 |
12.23 |
| 2026-07-31 00:00 |
21:58:26.38 |
-59:24:20.9 |
HIP 108344 |
11.48 |
| 2026-07-31 12:00 |
21:58:21.24 |
-59:24:42.6 |
HIP 108344 |
10.74 |
| 2026-08-01 00:00 |
21:58:16.07 |
-59:25:04.0 |
HIP 108344 |
10.00 |
| 2026-08-01 12:00 |
21:58:10.89 |
-59:25:25.2 |
HIP 108344 |
9.26 |
| 2026-08-02 00:00 |
21:58:05.70 |
-59:25:46.1 |
HIP 108344 |
8.53 |
| 2026-08-02 12:00 |
21:58:00.49 |
-59:26:06.8 |
HIP 108344 |
7.79 |
| 2026-08-03 00:00 |
21:57:55.26 |
-59:26:27.2 |
HIP 108344 |
7.05 |
| 2026-08-03 12:00 |
21:57:50.02 |
-59:26:47.4 |
HIP 108344 |
6.32 |
| 2026-08-04 00:00 |
21:57:44.77 |
-59:27:07.4 |
HIP 108344 |
5.59 |
| 2026-08-04 12:00 |
21:57:39.50 |
-59:27:27.1 |
HIP 108344 |
4.86 |
| 2026-08-05 00:00 |
21:57:34.21 |
-59:27:46.5 |
HIP 108344 |
4.14 |
| 2026-08-05 12:00 |
21:57:28.92 |
-59:28:05.7 |
HIP 108344 |
3.43 |
| 2026-08-06 00:00 |
21:57:23.61 |
-59:28:24.6 |
HIP 108344 |
2.74 |
| 2026-08-06 12:00 |
21:57:18.29 |
-59:28:43.2 |
HIP 108344 |
2.07 |
| 2026-08-07 00:00 |
21:57:12.96 |
-59:29:01.6 |
HIP 108344 |
1.49 |
| 2026-08-07 12:00 |
21:57:07.61 |
-59:29:19.8 |
HIP 108344 |
1.11 |
| 2026-08-08 00:00 |
21:57:02.26 |
-59:29:37.6 |
HIP 108344 |
1.15 |
| 2026-08-08 12:00 |
21:56:56.89 |
-59:29:55.2 |
HIP 108344 |
1.59 |
| 2026-08-09 00:00 |
21:56:51.52 |
-59:30:12.6 |
HIP 108344 |
2.19 |
| 2026-08-09 12:00 |
21:56:46.13 |
-59:30:29.6 |
HIP 108344 |
2.86 |
| 2026-08-10 00:00 |
21:56:40.73 |
-59:30:46.4 |
HIP 108344 |
3.55 |
| 2026-08-10 12:00 |
21:56:35.33 |
-59:31:02.9 |
HIP 108344 |
4.26 |
| 2026-08-11 00:00 |
21:56:29.92 |
-59:31:19.2 |
HIP 108344 |
4.97 |
| 2026-08-11 12:00 |
21:56:24.50 |
-59:31:35.2 |
HIP 108344 |
5.69 |
| 2026-08-12 00:00 |
21:56:19.07 |
-59:31:50.9 |
HIP 108344 |
6.41 |
| 2026-08-12 12:00 |
21:56:13.64 |
-59:32:06.3 |
HIP 108344 |
7.14 |
| 2026-08-13 00:00 |
21:56:08.20 |
-59:32:21.4 |
HIP 108344 |
7.86 |
| 2026-08-13 12:00 |
21:56:02.75 |
-59:32:36.3 |
HIP 108344 |
8.58 |
| 2026-08-14 00:00 |
21:55:57.30 |
-59:32:50.9 |
HIP 108344 |
9.31 |
| 2026-08-14 12:00 |
21:55:51.84 |
-59:33:05.2 |
HIP 108344 |
10.03 |
| 2026-08-15 00:00 |
21:55:46.38 |
-59:33:19.2 |
HIP 108344 |
10.75 |
| 2026-08-15 12:00 |
21:55:40.91 |
-59:33:32.9 |
HIP 108344 |
11.47 |
| 2026-08-16 00:00 |
21:55:35.44 |
-59:33:46.4 |
HIP 108344 |
12.20 |
| 2026-08-16 12:00 |
21:55:29.97 |
-59:33:59.5 |
HIP 108344 |
12.92 |
| 2026-08-17 00:00 |
21:55:24.49 |
-59:34:12.4 |
HIP 108344 |
13.64 |
| 2026-08-17 12:00 |
21:55:19.01 |
-59:34:25.0 |
HIP 108344 |
14.35 |
| 2026-08-18 00:00 |
21:55:13.53 |
-59:34:37.3 |
HIP 108037 |
14.63 |
| 2026-08-18 12:00 |
21:55:08.05 |
-59:34:49.3 |
HIP 108037 |
13.93 |
| 2026-08-19 00:00 |
21:55:02.57 |
-59:35:01.0 |
HIP 108037 |
13.23 |