메타데이터
| 항목 |
값 |
| Designation |
C/2004 V13 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-12-21T03:38:32.539200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:45Z |
| Obs used |
25 |
| NEO |
- |
| M1 |
15.000 |
| K1 |
15.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2005-01-03.0000000 |
| e |
0.99999462 |
| q (au) |
0.180856 |
| a (au) |
33639.443095 |
| i (deg) |
34.809752 |
| Ω (om, deg) |
207.699525 |
| ω (w, deg) |
92.690799 |
| M (ma, deg) |
0.000002 |
밝기
산란 + 전체 선형
$$
M_a = (13.145 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.145 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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) |
| 2026-05-12 00:00 |
07:08:58.90 |
-12:02:27.1 |
HIP 34443 |
14.29 |
| 2026-05-12 12:00 |
07:09:00.49 |
-12:02:10.7 |
HIP 34443 |
14.32 |
| 2026-05-13 00:00 |
07:09:02.11 |
-12:01:54.4 |
HIP 34443 |
14.37 |
| 2026-05-13 12:00 |
07:09:03.74 |
-12:01:38.3 |
HIP 34443 |
14.44 |
| 2026-05-14 00:00 |
07:09:05.39 |
-12:01:22.3 |
HIP 34443 |
14.53 |
| 2026-05-14 12:00 |
07:09:07.06 |
-12:01:06.5 |
HIP 34443 |
14.64 |
| 2026-05-15 00:00 |
07:09:08.75 |
-12:00:50.8 |
HIP 34443 |
14.77 |
| 2026-05-15 12:00 |
07:09:10.45 |
-12:00:35.3 |
HIP 34443 |
14.93 |
| 2026-05-16 00:00 |
07:09:12.17 |
-12:00:19.9 |
HIP 34443 |
15.10 |
| 2026-05-16 12:00 |
07:09:13.91 |
-12:00:04.7 |
HIP 34443 |
15.29 |
| 2026-05-17 00:00 |
07:09:15.67 |
-11:59:49.6 |
HIP 34443 |
15.50 |
| 2026-05-17 12:00 |
07:09:17.45 |
-11:59:34.7 |
HIP 34443 |
15.72 |
| 2026-05-18 00:00 |
07:09:19.24 |
-11:59:19.9 |
HIP 34443 |
15.97 |
| 2026-05-18 12:00 |
07:09:21.05 |
-11:59:05.3 |
HIP 34612 |
15.88 |
| 2026-05-19 00:00 |
07:09:22.87 |
-11:58:50.9 |
HIP 34612 |
15.39 |
| 2026-05-19 12:00 |
07:09:24.71 |
-11:58:36.6 |
HIP 34612 |
14.90 |
| 2026-05-20 00:00 |
07:09:26.57 |
-11:58:22.5 |
HIP 34612 |
14.41 |
| 2026-05-20 12:00 |
07:09:28.45 |
-11:58:08.5 |
HIP 34612 |
13.93 |
| 2026-05-21 00:00 |
07:09:30.34 |
-11:57:54.7 |
HIP 34612 |
13.44 |
| 2026-05-21 12:00 |
07:09:32.24 |
-11:57:41.1 |
HIP 34612 |
12.95 |
| 2026-05-22 00:00 |
07:09:34.17 |
-11:57:27.6 |
HIP 34612 |
12.47 |
| 2026-05-22 12:00 |
07:09:36.10 |
-11:57:14.3 |
HIP 34612 |
11.99 |
| 2026-05-23 00:00 |
07:09:38.06 |
-11:57:01.2 |
HIP 34612 |
11.52 |
| 2026-05-23 12:00 |
07:09:40.03 |
-11:56:48.2 |
HIP 34612 |
11.04 |
| 2026-05-24 00:00 |
07:09:42.01 |
-11:56:35.4 |
HIP 34612 |
10.58 |
| 2026-05-24 12:00 |
07:09:44.01 |
-11:56:22.7 |
HIP 34612 |
10.12 |
| 2026-05-25 00:00 |
07:09:46.03 |
-11:56:10.3 |
HIP 34612 |
9.66 |
| 2026-05-25 12:00 |
07:09:48.05 |
-11:55:57.9 |
HIP 34612 |
9.22 |
| 2026-05-26 00:00 |
07:09:50.10 |
-11:55:45.8 |
HIP 34612 |
8.79 |
| 2026-05-26 12:00 |
07:09:52.16 |
-11:55:33.8 |
HIP 34612 |
8.37 |
| 2026-05-27 00:00 |
07:09:54.23 |
-11:55:22.0 |
HIP 34612 |
7.97 |
| 2026-05-27 12:00 |
07:09:56.32 |
-11:55:10.4 |
HIP 34612 |
7.58 |
| 2026-05-28 00:00 |
07:09:58.42 |
-11:54:58.9 |
HIP 34612 |
7.22 |
| 2026-05-28 12:00 |
07:10:00.53 |
-11:54:47.6 |
HIP 34612 |
6.89 |
| 2026-05-29 00:00 |
07:10:02.66 |
-11:54:36.5 |
HIP 34612 |
6.58 |
| 2026-05-29 12:00 |
07:10:04.80 |
-11:54:25.5 |
HIP 34612 |
6.31 |
| 2026-05-30 00:00 |
07:10:06.96 |
-11:54:14.7 |
HIP 34612 |
6.09 |
| 2026-05-30 12:00 |
07:10:09.12 |
-11:54:04.1 |
HIP 34612 |
5.91 |
| 2026-05-31 00:00 |
07:10:11.31 |
-11:53:53.7 |
HIP 34612 |
5.78 |
| 2026-05-31 12:00 |
07:10:13.50 |
-11:53:43.4 |
HIP 34612 |
5.71 |
| 2026-06-01 00:00 |
07:10:15.71 |
-11:53:33.3 |
HIP 34612 |
5.70 |
| 2026-06-01 12:00 |
07:10:17.93 |
-11:53:23.4 |
HIP 34612 |
5.75 |
| 2026-06-02 00:00 |
07:10:20.16 |
-11:53:13.7 |
HIP 34612 |
5.85 |