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 |
0.998 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
03:47:37.90 |
-35:03:56.5 |
HIP 17922 |
34.97 |
| 2026-06-03 00:00 |
03:47:40.96 |
-35:03:57.0 |
HIP 17922 |
34.47 |
| 2026-06-03 12:00 |
03:47:44.01 |
-35:03:57.8 |
HIP 17922 |
33.97 |
| 2026-06-04 00:00 |
03:47:47.06 |
-35:03:58.8 |
HIP 17922 |
33.47 |
| 2026-06-04 12:00 |
03:47:50.10 |
-35:04:00.2 |
HIP 17922 |
32.97 |
| 2026-06-05 00:00 |
03:47:53.14 |
-35:04:01.8 |
HIP 17922 |
32.48 |
| 2026-06-05 12:00 |
03:47:56.17 |
-35:04:03.7 |
HIP 17922 |
31.99 |
| 2026-06-06 00:00 |
03:47:59.19 |
-35:04:05.9 |
HIP 17922 |
31.50 |
| 2026-06-06 12:00 |
03:48:02.21 |
-35:04:08.4 |
HIP 17922 |
31.01 |
| 2026-06-07 00:00 |
03:48:05.21 |
-35:04:11.1 |
HIP 17922 |
30.52 |
| 2026-06-07 12:00 |
03:48:08.21 |
-35:04:14.2 |
HIP 17922 |
30.04 |
| 2026-06-08 00:00 |
03:48:11.21 |
-35:04:17.5 |
HIP 17922 |
29.56 |
| 2026-06-08 12:00 |
03:48:14.19 |
-35:04:21.0 |
HIP 17922 |
29.09 |
| 2026-06-09 00:00 |
03:48:17.17 |
-35:04:24.9 |
HIP 17922 |
28.61 |
| 2026-06-09 12:00 |
03:48:20.14 |
-35:04:29.0 |
HIP 17922 |
28.14 |
| 2026-06-10 00:00 |
03:48:23.10 |
-35:04:33.5 |
HIP 17922 |
27.68 |
| 2026-06-10 12:00 |
03:48:26.05 |
-35:04:38.2 |
HIP 17922 |
27.21 |
| 2026-06-11 00:00 |
03:48:28.99 |
-35:04:43.1 |
HIP 17922 |
26.75 |
| 2026-06-11 12:00 |
03:48:31.92 |
-35:04:48.4 |
HIP 17922 |
26.30 |
| 2026-06-12 00:00 |
03:48:34.85 |
-35:04:53.9 |
HIP 17922 |
25.84 |
| 2026-06-12 12:00 |
03:48:37.76 |
-35:04:59.7 |
HIP 17922 |
25.39 |
| 2026-06-13 00:00 |
03:48:40.67 |
-35:05:05.8 |
HIP 17922 |
24.95 |
| 2026-06-13 12:00 |
03:48:43.56 |
-35:05:12.2 |
HIP 17922 |
24.51 |
| 2026-06-14 00:00 |
03:48:46.44 |
-35:05:18.8 |
HIP 17922 |
24.07 |
| 2026-06-14 12:00 |
03:48:49.32 |
-35:05:25.7 |
HIP 17922 |
23.64 |
| 2026-06-15 00:00 |
03:48:52.18 |
-35:05:32.9 |
HIP 17922 |
23.21 |
| 2026-06-15 12:00 |
03:48:55.03 |
-35:05:40.4 |
HIP 17922 |
22.79 |
| 2026-06-16 00:00 |
03:48:57.87 |
-35:05:48.1 |
HIP 17922 |
22.38 |
| 2026-06-16 12:00 |
03:49:00.70 |
-35:05:56.1 |
HIP 17922 |
21.96 |
| 2026-06-17 00:00 |
03:49:03.52 |
-35:06:04.4 |
HIP 17922 |
21.56 |
| 2026-06-17 12:00 |
03:49:06.33 |
-35:06:13.0 |
HIP 17922 |
21.16 |
| 2026-06-18 00:00 |
03:49:09.12 |
-35:06:21.8 |
HIP 17922 |
20.77 |
| 2026-06-18 12:00 |
03:49:11.90 |
-35:06:30.9 |
HIP 17922 |
20.38 |
| 2026-06-19 00:00 |
03:49:14.67 |
-35:06:40.2 |
HIP 17922 |
20.00 |
| 2026-06-19 12:00 |
03:49:17.43 |
-35:06:49.9 |
HIP 17922 |
19.63 |
| 2026-06-20 00:00 |
03:49:20.17 |
-35:06:59.8 |
HIP 17922 |
19.26 |
| 2026-06-20 12:00 |
03:49:22.90 |
-35:07:09.9 |
HIP 17922 |
18.90 |
| 2026-06-21 00:00 |
03:49:25.62 |
-35:07:20.4 |
HIP 17922 |
18.55 |
| 2026-06-21 12:00 |
03:49:28.33 |
-35:07:31.0 |
HIP 17922 |
18.21 |
| 2026-06-22 00:00 |
03:49:31.02 |
-35:07:42.0 |
HIP 17922 |
17.88 |