메타데이터
| 항목 |
값 |
| Designation |
C/2004 S1 (Van Ness) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-12-08T22:06:25.934400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:43Z |
| Obs used |
122 |
| NEO |
- |
| M1 |
16.000 |
| K1 |
7.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2004-10-08.0000000 |
| e |
0.99999485 |
| q (au) |
0.681767 |
| a (au) |
132276.648552 |
| i (deg) |
114.666841 |
| Ω (om, deg) |
19.219692 |
| ω (w, deg) |
92.816645 |
| M (ma, deg) |
359.999999 |
밝기
산란 + 전체 선형
$$
M_a = (17.981 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.981 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.680 |
| k |
0.991 |
| 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 |
07:48:06.56 |
-42:21:39.3 |
HIP 38076 |
8.83 |
| 2026-07-29 12:00 |
07:48:09.96 |
-42:21:49.6 |
HIP 38076 |
8.64 |
| 2026-07-30 00:00 |
07:48:13.36 |
-42:22:00.2 |
HIP 38076 |
8.48 |
| 2026-07-30 12:00 |
07:48:16.75 |
-42:22:11.1 |
HIP 38076 |
8.37 |
| 2026-07-31 00:00 |
07:48:20.14 |
-42:22:22.3 |
HIP 38076 |
8.31 |
| 2026-07-31 12:00 |
07:48:23.52 |
-42:22:33.7 |
HIP 38076 |
8.29 |
| 2026-08-01 00:00 |
07:48:26.89 |
-42:22:45.4 |
HIP 38076 |
8.32 |
| 2026-08-01 12:00 |
07:48:30.26 |
-42:22:57.4 |
HIP 38076 |
8.39 |
| 2026-08-02 00:00 |
07:48:33.61 |
-42:23:09.7 |
HIP 38076 |
8.51 |
| 2026-08-02 12:00 |
07:48:36.97 |
-42:23:22.3 |
HIP 38076 |
8.67 |
| 2026-08-03 00:00 |
07:48:40.31 |
-42:23:35.2 |
HIP 38076 |
8.88 |
| 2026-08-03 12:00 |
07:48:43.65 |
-42:23:48.3 |
HIP 38145 |
8.45 |
| 2026-08-04 00:00 |
07:48:46.97 |
-42:24:01.7 |
HIP 38145 |
8.02 |
| 2026-08-04 12:00 |
07:48:50.29 |
-42:24:15.4 |
HIP 38145 |
7.62 |
| 2026-08-05 00:00 |
07:48:53.61 |
-42:24:29.4 |
HIP 38145 |
7.25 |
| 2026-08-05 12:00 |
07:48:56.91 |
-42:24:43.6 |
HIP 38145 |
6.92 |
| 2026-08-06 00:00 |
07:49:00.20 |
-42:24:58.1 |
HIP 38145 |
6.64 |
| 2026-08-06 12:00 |
07:49:03.49 |
-42:25:12.9 |
HIP 38145 |
6.40 |
| 2026-08-07 00:00 |
07:49:06.77 |
-42:25:28.0 |
HIP 38145 |
6.22 |
| 2026-08-07 12:00 |
07:49:10.03 |
-42:25:43.3 |
HIP 38145 |
6.10 |
| 2026-08-08 00:00 |
07:49:13.29 |
-42:25:59.0 |
HIP 38145 |
6.05 |
| 2026-08-08 12:00 |
07:49:16.54 |
-42:26:14.9 |
HIP 38145 |
6.06 |
| 2026-08-09 00:00 |
07:49:19.77 |
-42:26:31.0 |
HIP 38145 |
6.13 |
| 2026-08-09 12:00 |
07:49:23.00 |
-42:26:47.5 |
HIP 38145 |
6.27 |
| 2026-08-10 00:00 |
07:49:26.22 |
-42:27:04.2 |
HIP 38145 |
6.47 |
| 2026-08-10 12:00 |
07:49:29.42 |
-42:27:21.1 |
HIP 38145 |
6.72 |
| 2026-08-11 00:00 |
07:49:32.62 |
-42:27:38.4 |
HIP 38145 |
7.02 |
| 2026-08-11 12:00 |
07:49:35.80 |
-42:27:55.9 |
HIP 38145 |
7.36 |
| 2026-08-12 00:00 |
07:49:38.97 |
-42:28:13.7 |
HIP 38145 |
7.74 |
| 2026-08-12 12:00 |
07:49:42.13 |
-42:28:31.7 |
HIP 38145 |
8.14 |
| 2026-08-13 00:00 |
07:49:45.27 |
-42:28:50.0 |
HIP 38145 |
8.58 |
| 2026-08-13 12:00 |
07:49:48.41 |
-42:29:08.6 |
HIP 38145 |
9.04 |
| 2026-08-14 00:00 |
07:49:51.53 |
-42:29:27.4 |
HIP 38145 |
9.52 |
| 2026-08-14 12:00 |
07:49:54.64 |
-42:29:46.5 |
HIP 38145 |
10.01 |
| 2026-08-15 00:00 |
07:49:57.73 |
-42:30:05.8 |
HIP 38145 |
10.52 |
| 2026-08-15 12:00 |
07:50:00.82 |
-42:30:25.4 |
HIP 38145 |
11.05 |
| 2026-08-16 00:00 |
07:50:03.89 |
-42:30:45.3 |
HIP 38145 |
11.58 |
| 2026-08-16 12:00 |
07:50:06.94 |
-42:31:05.4 |
HIP 38145 |
12.12 |
| 2026-08-17 00:00 |
07:50:09.98 |
-42:31:25.8 |
HIP 38145 |
12.67 |
| 2026-08-17 12:00 |
07:50:13.01 |
-42:31:46.4 |
HIP 38145 |
13.23 |
| 2026-08-18 00:00 |
07:50:16.02 |
-42:32:07.3 |
HIP 38145 |
13.79 |
| 2026-08-18 12:00 |
07:50:19.02 |
-42:32:28.4 |
HIP 38145 |
14.36 |
| 2026-08-19 00:00 |
07:50:22.00 |
-42:32:49.7 |
HIP 38145 |
14.93 |