메타데이터
| 항목 |
값 |
| Designation |
C/2019 JU6 (ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-06-01T01:29:57.295680Z |
| Orbit solution date (soln_date, UTC) |
2022-06-20T23:12:34Z |
| Obs used |
76 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-05-19.0000000 |
| e |
0.99939729 |
| q (au) |
2.045767 |
| a (au) |
3394.271759 |
| i (deg) |
148.291676 |
| Ω (om, deg) |
21.701965 |
| ω (w, deg) |
94.917780 |
| M (ma, deg) |
359.999935 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-03-26 00:00 |
09:23:58.71 |
-13:11:57.2 |
HIP 46191 |
21.40 |
| 2026-03-26 12:00 |
09:23:53.46 |
-13:11:03.2 |
HIP 46117 |
20.86 |
| 2026-03-27 00:00 |
09:23:48.26 |
-13:10:09.0 |
HIP 46117 |
20.39 |
| 2026-03-27 12:00 |
09:23:43.11 |
-13:09:14.8 |
HIP 46117 |
20.02 |
| 2026-03-28 00:00 |
09:23:38.00 |
-13:08:20.5 |
HIP 46117 |
19.76 |
| 2026-03-28 12:00 |
09:23:32.94 |
-13:07:26.2 |
HIP 46117 |
19.62 |
| 2026-03-29 00:00 |
09:23:27.93 |
-13:06:31.8 |
HIP 46117 |
19.58 |
| 2026-03-29 12:00 |
09:23:22.96 |
-13:05:37.4 |
HIP 46117 |
19.66 |
| 2026-03-30 00:00 |
09:23:18.05 |
-13:04:43.0 |
HIP 46117 |
19.84 |
| 2026-03-30 12:00 |
09:23:13.18 |
-13:03:48.5 |
HIP 46117 |
20.12 |
| 2026-03-31 00:00 |
09:23:08.36 |
-13:02:53.9 |
HIP 46117 |
20.50 |
| 2026-03-31 12:00 |
09:23:03.58 |
-13:01:59.4 |
HIP 46117 |
20.96 |
| 2026-04-01 00:00 |
09:22:58.86 |
-13:01:04.8 |
HIP 46117 |
21.51 |
| 2026-04-01 12:00 |
09:22:54.19 |
-13:00:10.2 |
HIP 46117 |
22.13 |
| 2026-04-02 00:00 |
09:22:49.56 |
-12:59:15.6 |
HIP 46117 |
22.81 |
| 2026-04-02 12:00 |
09:22:44.99 |
-12:58:21.0 |
HIP 46117 |
23.55 |
| 2026-04-03 00:00 |
09:22:40.46 |
-12:57:26.3 |
HIP 46117 |
24.35 |
| 2026-04-03 12:00 |
09:22:35.99 |
-12:56:31.7 |
HIP 46117 |
25.19 |
| 2026-04-04 00:00 |
09:22:31.56 |
-12:55:37.1 |
HIP 46117 |
26.06 |
| 2026-04-04 12:00 |
09:22:27.19 |
-12:54:42.4 |
HIP 46117 |
26.97 |
| 2026-04-05 00:00 |
09:22:22.87 |
-12:53:47.8 |
HIP 46117 |
27.91 |
| 2026-04-05 12:00 |
09:22:18.59 |
-12:52:53.2 |
HIP 46117 |
28.87 |
| 2026-04-06 00:00 |
09:22:14.37 |
-12:51:58.7 |
HIP 46117 |
29.86 |
| 2026-04-06 12:00 |
09:22:10.20 |
-12:51:04.1 |
HIP 46117 |
30.86 |
| 2026-04-07 00:00 |
09:22:06.08 |
-12:50:09.6 |
HIP 46117 |
31.87 |
| 2026-04-07 12:00 |
09:22:02.01 |
-12:49:15.1 |
HIP 46117 |
32.90 |
| 2026-04-08 00:00 |
09:21:58.00 |
-12:48:20.6 |
HIP 46117 |
33.94 |
| 2026-04-08 12:00 |
09:21:54.03 |
-12:47:26.2 |
HIP 46117 |
34.98 |
| 2026-04-09 00:00 |
09:21:50.12 |
-12:46:31.9 |
HIP 46117 |
36.03 |
| 2026-04-09 12:00 |
09:21:46.26 |
-12:45:37.5 |
HIP 46117 |
37.09 |
| 2026-04-10 00:00 |
09:21:42.45 |
-12:44:43.3 |
HIP 46117 |
38.15 |
| 2026-04-10 12:00 |
09:21:38.70 |
-12:43:49.1 |
HIP 46117 |
39.21 |
| 2026-04-11 00:00 |
09:21:35.00 |
-12:42:55.0 |
HIP 46117 |
40.27 |
| 2026-04-11 12:00 |
09:21:31.35 |
-12:42:00.9 |
HIP 46117 |
41.33 |
| 2026-04-12 00:00 |
09:21:27.75 |
-12:41:06.9 |
HIP 46117 |
42.38 |
| 2026-04-12 12:00 |
09:21:24.21 |
-12:40:13.0 |
HIP 46117 |
43.44 |
| 2026-04-13 00:00 |
09:21:20.72 |
-12:39:19.1 |
HIP 45763 |
44.25 |
| 2026-04-13 12:00 |
09:21:17.29 |
-12:38:25.4 |
HIP 45763 |
44.66 |
| 2026-04-14 00:00 |
09:21:13.91 |
-12:37:31.7 |
HIP 45751 |
44.50 |
| 2026-04-14 12:00 |
09:21:10.58 |
-12:36:38.2 |
HIP 45751 |
43.33 |
| 2026-04-15 00:00 |
09:21:07.31 |
-12:35:44.7 |
HIP 45751 |
42.17 |
| 2026-04-15 12:00 |
09:21:04.09 |
-12:34:51.3 |
HIP 45751 |
41.02 |
| 2026-04-16 00:00 |
09:21:00.92 |
-12:33:58.1 |
HIP 45751 |
39.87 |