메타데이터
| 항목 |
값 |
| Designation |
C/2007 H2 (Skiff) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-02-17T01:18:40.541760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:06Z |
| Obs used |
109 |
| NEO |
- |
| M1 |
18.300 |
| K1 |
6.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-04-24.0000000 |
| e |
0.97167863 |
| q (au) |
1.410452 |
| a (au) |
49.801695 |
| i (deg) |
52.190808 |
| Ω (om, deg) |
203.771836 |
| ω (w, deg) |
319.302431 |
| M (ma, deg) |
0.184936 |
밝기
산란 + 전체 선형
$$
M_a = (18.239 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.239 |
| n |
2.000 |
| gf |
0.929 |
| gb |
-0.626 |
| k |
0.989 |
| δ90 |
7.543 |
| 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 |
21:37:22.93 |
+31:32:49.2 |
HIP 106915 |
24.50 |
| 2026-06-01 12:00 |
21:37:21.97 |
+31:33:18.9 |
HIP 106915 |
24.51 |
| 2026-06-02 00:00 |
21:37:20.98 |
+31:33:48.4 |
HIP 106915 |
24.55 |
| 2026-06-02 12:00 |
21:37:19.96 |
+31:34:17.7 |
HIP 106915 |
24.61 |
| 2026-06-03 00:00 |
21:37:18.91 |
+31:34:46.8 |
HIP 106915 |
24.68 |
| 2026-06-03 12:00 |
21:37:17.83 |
+31:35:15.7 |
HIP 106915 |
24.77 |
| 2026-06-04 00:00 |
21:37:16.72 |
+31:35:44.5 |
HIP 106915 |
24.88 |
| 2026-06-04 12:00 |
21:37:15.59 |
+31:36:13.1 |
HIP 106915 |
25.01 |
| 2026-06-05 00:00 |
21:37:14.42 |
+31:36:41.5 |
HIP 106915 |
25.15 |
| 2026-06-05 12:00 |
21:37:13.22 |
+31:37:09.7 |
HIP 106915 |
25.32 |
| 2026-06-06 00:00 |
21:37:12.00 |
+31:37:37.7 |
HIP 106915 |
25.50 |
| 2026-06-06 12:00 |
21:37:10.75 |
+31:38:05.5 |
HIP 106915 |
25.69 |
| 2026-06-07 00:00 |
21:37:09.46 |
+31:38:33.1 |
HIP 106915 |
25.90 |
| 2026-06-07 12:00 |
21:37:08.15 |
+31:39:00.5 |
HIP 106915 |
26.13 |
| 2026-06-08 00:00 |
21:37:06.81 |
+31:39:27.7 |
HIP 106915 |
26.37 |
| 2026-06-08 12:00 |
21:37:05.44 |
+31:39:54.7 |
HIP 106915 |
26.63 |
| 2026-06-09 00:00 |
21:37:04.05 |
+31:40:21.5 |
HIP 106690 |
26.59 |
| 2026-06-09 12:00 |
21:37:02.62 |
+31:40:48.1 |
HIP 106690 |
26.09 |
| 2026-06-10 00:00 |
21:37:01.17 |
+31:41:14.4 |
HIP 106690 |
25.59 |
| 2026-06-10 12:00 |
21:36:59.68 |
+31:41:40.6 |
HIP 106690 |
25.10 |
| 2026-06-11 00:00 |
21:36:58.17 |
+31:42:06.5 |
HIP 106690 |
24.60 |
| 2026-06-11 12:00 |
21:36:56.63 |
+31:42:32.3 |
HIP 106690 |
24.12 |
| 2026-06-12 00:00 |
21:36:55.07 |
+31:42:57.8 |
HIP 106690 |
23.64 |
| 2026-06-12 12:00 |
21:36:53.47 |
+31:43:23.1 |
HIP 106690 |
23.16 |
| 2026-06-13 00:00 |
21:36:51.85 |
+31:43:48.1 |
HIP 106690 |
22.69 |
| 2026-06-13 12:00 |
21:36:50.20 |
+31:44:13.0 |
HIP 106690 |
22.22 |
| 2026-06-14 00:00 |
21:36:48.52 |
+31:44:37.6 |
HIP 106690 |
21.76 |
| 2026-06-14 12:00 |
21:36:46.81 |
+31:45:01.9 |
HIP 106690 |
21.31 |
| 2026-06-15 00:00 |
21:36:45.08 |
+31:45:26.1 |
HIP 106690 |
20.87 |
| 2026-06-15 12:00 |
21:36:43.32 |
+31:45:50.0 |
HIP 106690 |
20.43 |
| 2026-06-16 00:00 |
21:36:41.53 |
+31:46:13.7 |
HIP 106690 |
20.00 |
| 2026-06-16 12:00 |
21:36:39.72 |
+31:46:37.1 |
HIP 106690 |
19.59 |
| 2026-06-17 00:00 |
21:36:37.87 |
+31:47:00.3 |
HIP 106690 |
19.18 |
| 2026-06-17 12:00 |
21:36:36.01 |
+31:47:23.2 |
HIP 106690 |
18.78 |
| 2026-06-18 00:00 |
21:36:34.11 |
+31:47:46.0 |
HIP 106690 |
18.40 |
| 2026-06-18 12:00 |
21:36:32.19 |
+31:48:08.4 |
HIP 106690 |
18.03 |
| 2026-06-19 00:00 |
21:36:30.24 |
+31:48:30.6 |
HIP 106690 |
17.67 |
| 2026-06-19 12:00 |
21:36:28.27 |
+31:48:52.6 |
HIP 106690 |
17.33 |
| 2026-06-20 00:00 |
21:36:26.27 |
+31:49:14.3 |
HIP 106690 |
17.00 |
| 2026-06-20 12:00 |
21:36:24.25 |
+31:49:35.7 |
HIP 106690 |
16.69 |
| 2026-06-21 00:00 |
21:36:22.20 |
+31:49:56.9 |
HIP 106690 |
16.40 |
| 2026-06-21 12:00 |
21:36:20.12 |
+31:50:17.9 |
HIP 106690 |
16.13 |
| 2026-06-22 00:00 |
21:36:18.02 |
+31:50:38.6 |
HIP 106690 |
15.88 |