메타데이터
| 항목 |
값 |
| Designation |
C/2008 J6 (Hill) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-04-10T22:28:26.912640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:20Z |
| Obs used |
385 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-07-07.0000000 |
| e |
1.00213779 |
| q (au) |
2.003509 |
| a (au) |
-937.187180 |
| i (deg) |
44.988370 |
| Ω (om, deg) |
298.179314 |
| ω (w, deg) |
10.700067 |
| M (ma, deg) |
0.002991 |
밝기
산란 + 전체 선형
$$
M_a = (10.018 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.018 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.997 |
| 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 |
07:11:47.86 |
+33:51:36.6 |
HIP 34812 |
19.17 |
| 2026-05-12 12:00 |
07:11:50.09 |
+33:51:23.8 |
HIP 34812 |
19.20 |
| 2026-05-13 00:00 |
07:11:52.35 |
+33:51:10.9 |
HIP 34812 |
19.24 |
| 2026-05-13 12:00 |
07:11:54.62 |
+33:50:58.1 |
HIP 34812 |
19.29 |
| 2026-05-14 00:00 |
07:11:56.93 |
+33:50:45.3 |
HIP 34812 |
19.36 |
| 2026-05-14 12:00 |
07:11:59.26 |
+33:50:32.5 |
HIP 34812 |
19.43 |
| 2026-05-15 00:00 |
07:12:01.61 |
+33:50:19.7 |
HIP 34812 |
19.52 |
| 2026-05-15 12:00 |
07:12:03.99 |
+33:50:07.0 |
HIP 34812 |
19.63 |
| 2026-05-16 00:00 |
07:12:06.39 |
+33:49:54.2 |
HIP 34812 |
19.74 |
| 2026-05-16 12:00 |
07:12:08.81 |
+33:49:41.4 |
HIP 34812 |
19.87 |
| 2026-05-17 00:00 |
07:12:11.26 |
+33:49:28.7 |
HIP 34812 |
20.01 |
| 2026-05-17 12:00 |
07:12:13.73 |
+33:49:16.0 |
HIP 34812 |
20.16 |
| 2026-05-18 00:00 |
07:12:16.22 |
+33:49:03.3 |
HIP 34812 |
20.33 |
| 2026-05-18 12:00 |
07:12:18.74 |
+33:48:50.6 |
HIP 34812 |
20.51 |
| 2026-05-19 00:00 |
07:12:21.28 |
+33:48:37.9 |
HIP 34812 |
20.71 |
| 2026-05-19 12:00 |
07:12:23.84 |
+33:48:25.3 |
HIP 34812 |
20.92 |
| 2026-05-20 00:00 |
07:12:26.43 |
+33:48:12.7 |
HIP 34812 |
21.14 |
| 2026-05-20 12:00 |
07:12:29.04 |
+33:48:00.1 |
HIP 34812 |
21.37 |
| 2026-05-21 00:00 |
07:12:31.66 |
+33:47:47.5 |
HIP 34812 |
21.62 |
| 2026-05-21 12:00 |
07:12:34.32 |
+33:47:34.9 |
HIP 34812 |
21.88 |
| 2026-05-22 00:00 |
07:12:36.99 |
+33:47:22.3 |
HIP 34812 |
22.15 |
| 2026-05-22 12:00 |
07:12:39.68 |
+33:47:09.8 |
HIP 34812 |
22.44 |
| 2026-05-23 00:00 |
07:12:42.40 |
+33:46:57.3 |
HIP 34812 |
22.74 |
| 2026-05-23 12:00 |
07:12:45.13 |
+33:46:44.8 |
HIP 34812 |
23.05 |
| 2026-05-24 00:00 |
07:12:47.89 |
+33:46:32.3 |
HIP 34812 |
23.37 |
| 2026-05-24 12:00 |
07:12:50.66 |
+33:46:19.9 |
HIP 34812 |
23.71 |
| 2026-05-25 00:00 |
07:12:53.46 |
+33:46:07.5 |
HIP 34812 |
24.05 |
| 2026-05-25 12:00 |
07:12:56.28 |
+33:45:55.1 |
HIP 34812 |
24.41 |
| 2026-05-26 00:00 |
07:12:59.11 |
+33:45:42.7 |
HIP 34812 |
24.78 |
| 2026-05-26 12:00 |
07:13:01.97 |
+33:45:30.4 |
HIP 34812 |
25.16 |
| 2026-05-27 00:00 |
07:13:04.85 |
+33:45:18.1 |
HIP 34812 |
25.55 |
| 2026-05-27 12:00 |
07:13:07.74 |
+33:45:05.8 |
HIP 34812 |
25.95 |
| 2026-05-28 00:00 |
07:13:10.65 |
+33:44:53.6 |
HIP 34812 |
26.36 |
| 2026-05-28 12:00 |
07:13:13.59 |
+33:44:41.3 |
HIP 34812 |
26.78 |
| 2026-05-29 00:00 |
07:13:16.54 |
+33:44:29.1 |
HIP 34812 |
27.21 |
| 2026-05-29 12:00 |
07:13:19.51 |
+33:44:17.0 |
HIP 34812 |
27.65 |
| 2026-05-30 00:00 |
07:13:22.50 |
+33:44:04.8 |
HIP 34812 |
28.10 |
| 2026-05-30 12:00 |
07:13:25.50 |
+33:43:52.7 |
HIP 34812 |
28.56 |
| 2026-05-31 00:00 |
07:13:28.53 |
+33:43:40.7 |
HIP 34812 |
29.03 |
| 2026-05-31 12:00 |
07:13:31.57 |
+33:43:28.6 |
HIP 34812 |
29.50 |
| 2026-06-01 00:00 |
07:13:34.63 |
+33:43:16.6 |
HIP 34812 |
29.99 |
| 2026-06-01 12:00 |
07:13:37.70 |
+33:43:04.6 |
HIP 34812 |
30.48 |
| 2026-06-02 00:00 |
07:13:40.80 |
+33:42:52.7 |
HIP 34812 |
30.98 |