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) |
| 2026-09-20 00:00 |
07:18:36.55 |
-12:27:14.5 |
HIP 35478 |
11.83 |
| 2026-09-20 12:00 |
07:18:37.52 |
-12:27:37.6 |
HIP 35478 |
11.50 |
| 2026-09-21 00:00 |
07:18:38.47 |
-12:28:00.7 |
HIP 35478 |
11.19 |
| 2026-09-21 12:00 |
07:18:39.39 |
-12:28:23.9 |
HIP 35478 |
10.89 |
| 2026-09-22 00:00 |
07:18:40.29 |
-12:28:47.1 |
HIP 35478 |
10.61 |
| 2026-09-22 12:00 |
07:18:41.17 |
-12:29:10.3 |
HIP 35478 |
10.35 |
| 2026-09-23 00:00 |
07:18:42.03 |
-12:29:33.6 |
HIP 35478 |
10.10 |
| 2026-09-23 12:00 |
07:18:42.87 |
-12:29:56.8 |
HIP 35478 |
9.87 |
| 2026-09-24 00:00 |
07:18:43.68 |
-12:30:20.2 |
HIP 35478 |
9.66 |
| 2026-09-24 12:00 |
07:18:44.48 |
-12:30:43.5 |
HIP 35478 |
9.47 |
| 2026-09-25 00:00 |
07:18:45.25 |
-12:31:06.9 |
HIP 35478 |
9.31 |
| 2026-09-25 12:00 |
07:18:46.00 |
-12:31:30.3 |
HIP 35478 |
9.16 |
| 2026-09-26 00:00 |
07:18:46.72 |
-12:31:53.7 |
HIP 35478 |
9.04 |
| 2026-09-26 12:00 |
07:18:47.43 |
-12:32:17.1 |
HIP 35478 |
8.95 |
| 2026-09-27 00:00 |
07:18:48.11 |
-12:32:40.6 |
HIP 35478 |
8.88 |
| 2026-09-27 12:00 |
07:18:48.77 |
-12:33:04.1 |
HIP 35478 |
8.83 |
| 2026-09-28 00:00 |
07:18:49.41 |
-12:33:27.6 |
HIP 35478 |
8.81 |
| 2026-09-28 12:00 |
07:18:50.02 |
-12:33:51.1 |
HIP 35478 |
8.82 |
| 2026-09-29 00:00 |
07:18:50.61 |
-12:34:14.6 |
HIP 35478 |
8.85 |
| 2026-09-29 12:00 |
07:18:51.18 |
-12:34:38.1 |
HIP 35478 |
8.90 |
| 2026-09-30 00:00 |
07:18:51.73 |
-12:35:01.7 |
HIP 35478 |
8.98 |
| 2026-09-30 12:00 |
07:18:52.26 |
-12:35:25.2 |
HIP 35478 |
9.08 |
| 2026-10-01 00:00 |
07:18:52.76 |
-12:35:48.8 |
HIP 35478 |
9.21 |
| 2026-10-01 12:00 |
07:18:53.24 |
-12:36:12.4 |
HIP 35478 |
9.35 |
| 2026-10-02 00:00 |
07:18:53.69 |
-12:36:35.9 |
HIP 35478 |
9.52 |
| 2026-10-02 12:00 |
07:18:54.13 |
-12:36:59.5 |
HIP 35478 |
9.70 |
| 2026-10-03 00:00 |
07:18:54.54 |
-12:37:23.1 |
HIP 35478 |
9.90 |
| 2026-10-03 12:00 |
07:18:54.92 |
-12:37:46.7 |
HIP 35478 |
10.12 |
| 2026-10-04 00:00 |
07:18:55.29 |
-12:38:10.2 |
HIP 35478 |
10.35 |
| 2026-10-04 12:00 |
07:18:55.63 |
-12:38:33.8 |
HIP 35478 |
10.59 |
| 2026-10-05 00:00 |
07:18:55.95 |
-12:38:57.4 |
HIP 35478 |
10.85 |
| 2026-10-05 12:00 |
07:18:56.24 |
-12:39:20.9 |
HIP 35478 |
11.12 |
| 2026-10-06 00:00 |
07:18:56.51 |
-12:39:44.5 |
HIP 35478 |
11.40 |
| 2026-10-06 12:00 |
07:18:56.76 |
-12:40:08.0 |
HIP 35478 |
11.69 |
| 2026-10-07 00:00 |
07:18:56.98 |
-12:40:31.5 |
HIP 35478 |
11.99 |
| 2026-10-07 12:00 |
07:18:57.18 |
-12:40:55.0 |
HIP 35478 |
12.30 |
| 2026-10-08 00:00 |
07:18:57.36 |
-12:41:18.5 |
HIP 35478 |
12.61 |
| 2026-10-08 12:00 |
07:18:57.51 |
-12:41:42.0 |
HIP 35478 |
12.93 |
| 2026-10-09 00:00 |
07:18:57.64 |
-12:42:05.4 |
HIP 35478 |
13.26 |
| 2026-10-09 12:00 |
07:18:57.75 |
-12:42:28.8 |
HIP 35478 |
13.60 |
| 2026-10-10 00:00 |
07:18:57.83 |
-12:42:52.2 |
HIP 35478 |
13.93 |
| 2026-10-10 12:00 |
07:18:57.89 |
-12:43:15.6 |
HIP 35478 |
14.28 |
| 2026-10-11 00:00 |
07:18:57.92 |
-12:43:39.0 |
HIP 35478 |
14.63 |