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) |
| 2026-09-20 00:00 |
21:49:29.89 |
-59:37:13.3 |
HIP 107656 |
9.56 |
| 2026-09-20 12:00 |
21:49:25.28 |
-59:37:05.8 |
HIP 107656 |
8.98 |
| 2026-09-21 00:00 |
21:49:20.70 |
-59:36:57.9 |
HIP 107656 |
8.41 |
| 2026-09-21 12:00 |
21:49:16.15 |
-59:36:49.8 |
HIP 107656 |
7.85 |
| 2026-09-22 00:00 |
21:49:11.63 |
-59:36:41.4 |
HIP 107656 |
7.29 |
| 2026-09-22 12:00 |
21:49:07.13 |
-59:36:32.7 |
HIP 107656 |
6.73 |
| 2026-09-23 00:00 |
21:49:02.67 |
-59:36:23.7 |
HIP 107656 |
6.18 |
| 2026-09-23 12:00 |
21:48:58.23 |
-59:36:14.4 |
HIP 107656 |
5.64 |
| 2026-09-24 00:00 |
21:48:53.82 |
-59:36:04.9 |
HIP 107656 |
5.10 |
| 2026-09-24 12:00 |
21:48:49.45 |
-59:35:55.1 |
HIP 107656 |
4.58 |
| 2026-09-25 00:00 |
21:48:45.10 |
-59:35:45.0 |
HIP 107656 |
4.07 |
| 2026-09-25 12:00 |
21:48:40.78 |
-59:35:34.6 |
HIP 107656 |
3.58 |
| 2026-09-26 00:00 |
21:48:36.49 |
-59:35:23.9 |
HIP 107656 |
3.12 |
| 2026-09-26 12:00 |
21:48:32.24 |
-59:35:13.0 |
HIP 107656 |
2.69 |
| 2026-09-27 00:00 |
21:48:28.01 |
-59:35:01.8 |
HIP 107656 |
2.32 |
| 2026-09-27 12:00 |
21:48:23.82 |
-59:34:50.4 |
HIP 107656 |
2.05 |
| 2026-09-28 00:00 |
21:48:19.65 |
-59:34:38.6 |
HIP 107656 |
1.90 |
| 2026-09-28 12:00 |
21:48:15.52 |
-59:34:26.6 |
HIP 107656 |
1.90 |
| 2026-09-29 00:00 |
21:48:11.43 |
-59:34:14.4 |
HIP 107656 |
2.06 |
| 2026-09-29 12:00 |
21:48:07.36 |
-59:34:01.8 |
HIP 107656 |
2.33 |
| 2026-09-30 00:00 |
21:48:03.33 |
-59:33:49.1 |
HIP 107656 |
2.69 |
| 2026-09-30 12:00 |
21:47:59.33 |
-59:33:36.0 |
HIP 107656 |
3.10 |
| 2026-10-01 00:00 |
21:47:55.37 |
-59:33:22.7 |
HIP 107656 |
3.55 |
| 2026-10-01 12:00 |
21:47:51.44 |
-59:33:09.1 |
HIP 107656 |
4.01 |
| 2026-10-02 00:00 |
21:47:47.54 |
-59:32:55.2 |
HIP 107656 |
4.49 |
| 2026-10-02 12:00 |
21:47:43.68 |
-59:32:41.1 |
HIP 107656 |
4.98 |
| 2026-10-03 00:00 |
21:47:39.85 |
-59:32:26.7 |
HIP 107656 |
5.48 |
| 2026-10-03 12:00 |
21:47:36.06 |
-59:32:12.1 |
HIP 107656 |
5.97 |
| 2026-10-04 00:00 |
21:47:32.30 |
-59:31:57.2 |
HIP 107656 |
6.48 |
| 2026-10-04 12:00 |
21:47:28.58 |
-59:31:42.1 |
HIP 107656 |
6.98 |
| 2026-10-05 00:00 |
21:47:24.90 |
-59:31:26.7 |
HIP 107656 |
7.48 |
| 2026-10-05 12:00 |
21:47:21.25 |
-59:31:11.1 |
HIP 107656 |
7.99 |
| 2026-10-06 00:00 |
21:47:17.64 |
-59:30:55.2 |
HIP 107656 |
8.49 |
| 2026-10-06 12:00 |
21:47:14.07 |
-59:30:39.0 |
HIP 107656 |
9.00 |
| 2026-10-07 00:00 |
21:47:10.53 |
-59:30:22.6 |
HIP 107656 |
9.50 |
| 2026-10-07 12:00 |
21:47:07.03 |
-59:30:06.0 |
HIP 107656 |
10.00 |
| 2026-10-08 00:00 |
21:47:03.57 |
-59:29:49.1 |
HIP 107656 |
10.50 |
| 2026-10-08 12:00 |
21:47:00.15 |
-59:29:32.0 |
HIP 107656 |
11.00 |
| 2026-10-09 00:00 |
21:46:56.77 |
-59:29:14.6 |
HIP 107656 |
11.50 |
| 2026-10-09 12:00 |
21:46:53.42 |
-59:28:57.0 |
HIP 107656 |
11.99 |
| 2026-10-10 00:00 |
21:46:50.12 |
-59:28:39.2 |
HIP 107656 |
12.49 |
| 2026-10-10 12:00 |
21:46:46.85 |
-59:28:21.1 |
HIP 107656 |
12.98 |
| 2026-10-11 00:00 |
21:46:43.62 |
-59:28:02.7 |
HIP 107656 |
13.47 |