메타데이터
| 항목 |
값 |
| Designation |
C/2000 J1 (Ferris) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-05-11T07:12:19.716480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
24 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2000-05-11.0000000 |
| e |
0.95426363 |
| q (au) |
2.542550 |
| a (au) |
55.591420 |
| i (deg) |
98.794665 |
| Ω (om, deg) |
28.440310 |
| ω (w, deg) |
147.219674 |
| M (ma, deg) |
359.999286 |
밝기
산란 + 전체 선형
$$
M_a = (18.720 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.720 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.872 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
03:45:23.56 |
-35:08:00.0 |
HIP 17210 |
53.39 |
| 2026-05-12 12:00 |
03:45:26.68 |
-35:07:48.4 |
HIP 17210 |
53.96 |
| 2026-05-13 00:00 |
03:45:29.80 |
-35:07:37.2 |
HIP 17210 |
54.54 |
| 2026-05-13 12:00 |
03:45:32.93 |
-35:07:26.2 |
HIP 17210 |
55.11 |
| 2026-05-14 00:00 |
03:45:36.06 |
-35:07:15.5 |
HIP 17210 |
55.70 |
| 2026-05-14 12:00 |
03:45:39.19 |
-35:07:05.1 |
HIP 17922 |
55.18 |
| 2026-05-15 00:00 |
03:45:42.33 |
-35:06:54.9 |
HIP 17922 |
54.63 |
| 2026-05-15 12:00 |
03:45:45.46 |
-35:06:45.1 |
HIP 17922 |
54.08 |
| 2026-05-16 00:00 |
03:45:48.60 |
-35:06:35.5 |
HIP 17922 |
53.53 |
| 2026-05-16 12:00 |
03:45:51.74 |
-35:06:26.2 |
HIP 17922 |
52.98 |
| 2026-05-17 00:00 |
03:45:54.88 |
-35:06:17.1 |
HIP 17922 |
52.44 |
| 2026-05-17 12:00 |
03:45:58.03 |
-35:06:08.4 |
HIP 17922 |
51.89 |
| 2026-05-18 00:00 |
03:46:01.17 |
-35:05:59.9 |
HIP 17922 |
51.35 |
| 2026-05-18 12:00 |
03:46:04.31 |
-35:05:51.7 |
HIP 17922 |
50.80 |
| 2026-05-19 00:00 |
03:46:07.46 |
-35:05:43.8 |
HIP 17922 |
50.26 |
| 2026-05-19 12:00 |
03:46:10.60 |
-35:05:36.1 |
HIP 17922 |
49.71 |
| 2026-05-20 00:00 |
03:46:13.75 |
-35:05:28.8 |
HIP 17922 |
49.17 |
| 2026-05-20 12:00 |
03:46:16.89 |
-35:05:21.7 |
HIP 17922 |
48.63 |
| 2026-05-21 00:00 |
03:46:20.04 |
-35:05:14.9 |
HIP 17922 |
48.09 |
| 2026-05-21 12:00 |
03:46:23.18 |
-35:05:08.4 |
HIP 17922 |
47.55 |
| 2026-05-22 00:00 |
03:46:26.33 |
-35:05:02.2 |
HIP 17922 |
47.01 |
| 2026-05-22 12:00 |
03:46:29.47 |
-35:04:56.2 |
HIP 17922 |
46.47 |
| 2026-05-23 00:00 |
03:46:32.61 |
-35:04:50.6 |
HIP 17922 |
45.94 |
| 2026-05-23 12:00 |
03:46:35.75 |
-35:04:45.2 |
HIP 17922 |
45.40 |
| 2026-05-24 00:00 |
03:46:38.89 |
-35:04:40.1 |
HIP 17922 |
44.87 |
| 2026-05-24 12:00 |
03:46:42.02 |
-35:04:35.3 |
HIP 17922 |
44.33 |
| 2026-05-25 00:00 |
03:46:45.15 |
-35:04:30.7 |
HIP 17922 |
43.80 |
| 2026-05-25 12:00 |
03:46:48.29 |
-35:04:26.5 |
HIP 17922 |
43.27 |
| 2026-05-26 00:00 |
03:46:51.41 |
-35:04:22.5 |
HIP 17922 |
42.74 |
| 2026-05-26 12:00 |
03:46:54.54 |
-35:04:18.8 |
HIP 17922 |
42.21 |
| 2026-05-27 00:00 |
03:46:57.66 |
-35:04:15.4 |
HIP 17922 |
41.68 |
| 2026-05-27 12:00 |
03:47:00.78 |
-35:04:12.2 |
HIP 17922 |
41.16 |
| 2026-05-28 00:00 |
03:47:03.90 |
-35:04:09.4 |
HIP 17922 |
40.63 |
| 2026-05-28 12:00 |
03:47:07.01 |
-35:04:06.8 |
HIP 17922 |
40.11 |
| 2026-05-29 00:00 |
03:47:10.12 |
-35:04:04.5 |
HIP 17922 |
39.59 |
| 2026-05-29 12:00 |
03:47:13.22 |
-35:04:02.5 |
HIP 17922 |
39.07 |
| 2026-05-30 00:00 |
03:47:16.33 |
-35:04:00.7 |
HIP 17922 |
38.55 |
| 2026-05-30 12:00 |
03:47:19.42 |
-35:03:59.3 |
HIP 17922 |
38.04 |
| 2026-05-31 00:00 |
03:47:22.51 |
-35:03:58.1 |
HIP 17922 |
37.52 |
| 2026-05-31 12:00 |
03:47:25.60 |
-35:03:57.2 |
HIP 17922 |
37.01 |
| 2026-06-01 00:00 |
03:47:28.68 |
-35:03:56.6 |
HIP 17922 |
36.50 |
| 2026-06-01 12:00 |
03:47:31.76 |
-35:03:56.3 |
HIP 17922 |
35.99 |
| 2026-06-02 00:00 |
03:47:34.83 |
-35:03:56.2 |
HIP 17922 |
35.48 |