메타데이터
| 항목 |
값 |
| Designation |
C/2014 F1 (Hill) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-10-04T20:00:02.148480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:50Z |
| Obs used |
190 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-04-19.0000000 |
| e |
0.99907518 |
| q (au) |
3.496337 |
| a (au) |
3780.558013 |
| i (deg) |
108.253050 |
| Ω (om, deg) |
239.902413 |
| ω (w, deg) |
8.242943 |
| M (ma, deg) |
0.000832 |
밝기
산란 + 전체 선형
$$
M_a = (12.343 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.343 |
| n |
2.000 |
| gf |
0.983 |
| gb |
-0.854 |
| k |
1.000 |
| δ90 |
9.993 |
| 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 |
04:01:31.69 |
+52:40:36.2 |
HIP 18900 |
14.37 |
| 2026-03-26 12:00 |
04:01:35.34 |
+52:40:06.8 |
HIP 18900 |
13.74 |
| 2026-03-27 00:00 |
04:01:39.03 |
+52:39:37.6 |
HIP 18900 |
13.11 |
| 2026-03-27 12:00 |
04:01:42.78 |
+52:39:08.7 |
HIP 18900 |
12.48 |
| 2026-03-28 00:00 |
04:01:46.56 |
+52:38:40.1 |
HIP 18900 |
11.87 |
| 2026-03-28 12:00 |
04:01:50.40 |
+52:38:11.6 |
HIP 18900 |
11.26 |
| 2026-03-29 00:00 |
04:01:54.28 |
+52:37:43.5 |
HIP 18900 |
10.66 |
| 2026-03-29 12:00 |
04:01:58.20 |
+52:37:15.6 |
HIP 18900 |
10.08 |
| 2026-03-30 00:00 |
04:02:02.17 |
+52:36:48.0 |
HIP 18900 |
9.52 |
| 2026-03-30 12:00 |
04:02:06.18 |
+52:36:20.6 |
HIP 18900 |
8.97 |
| 2026-03-31 00:00 |
04:02:10.23 |
+52:35:53.5 |
HIP 18900 |
8.45 |
| 2026-03-31 12:00 |
04:02:14.33 |
+52:35:26.6 |
HIP 18900 |
7.96 |
| 2026-04-01 00:00 |
04:02:18.47 |
+52:35:00.0 |
HIP 18900 |
7.52 |
| 2026-04-01 12:00 |
04:02:22.65 |
+52:34:33.6 |
HIP 18900 |
7.11 |
| 2026-04-02 00:00 |
04:02:26.88 |
+52:34:07.5 |
HIP 18900 |
6.77 |
| 2026-04-02 12:00 |
04:02:31.15 |
+52:33:41.7 |
HIP 18900 |
6.49 |
| 2026-04-03 00:00 |
04:02:35.46 |
+52:33:16.2 |
HIP 18900 |
6.29 |
| 2026-04-03 12:00 |
04:02:39.81 |
+52:32:50.9 |
HIP 18900 |
6.17 |
| 2026-04-04 00:00 |
04:02:44.20 |
+52:32:25.8 |
HIP 18900 |
6.15 |
| 2026-04-04 12:00 |
04:02:48.63 |
+52:32:01.0 |
HIP 18900 |
6.22 |
| 2026-04-05 00:00 |
04:02:53.10 |
+52:31:36.5 |
HIP 18900 |
6.38 |
| 2026-04-05 12:00 |
04:02:57.61 |
+52:31:12.3 |
HIP 18900 |
6.62 |
| 2026-04-06 00:00 |
04:03:02.16 |
+52:30:48.3 |
HIP 18900 |
6.95 |
| 2026-04-06 12:00 |
04:03:06.75 |
+52:30:24.6 |
HIP 18900 |
7.34 |
| 2026-04-07 00:00 |
04:03:11.38 |
+52:30:01.1 |
HIP 18900 |
7.79 |
| 2026-04-07 12:00 |
04:03:16.05 |
+52:29:38.0 |
HIP 18900 |
8.30 |
| 2026-04-08 00:00 |
04:03:20.75 |
+52:29:15.0 |
HIP 18900 |
8.84 |
| 2026-04-08 12:00 |
04:03:25.50 |
+52:28:52.4 |
HIP 18900 |
9.42 |
| 2026-04-09 00:00 |
04:03:30.28 |
+52:28:30.0 |
HIP 18900 |
10.04 |
| 2026-04-09 12:00 |
04:03:35.10 |
+52:28:07.9 |
HIP 18900 |
10.67 |
| 2026-04-10 00:00 |
04:03:39.95 |
+52:27:46.1 |
HIP 18900 |
11.34 |
| 2026-04-10 12:00 |
04:03:44.84 |
+52:27:24.5 |
HIP 18900 |
12.01 |
| 2026-04-11 00:00 |
04:03:49.77 |
+52:27:03.2 |
HIP 18900 |
12.71 |
| 2026-04-11 12:00 |
04:03:54.73 |
+52:26:42.2 |
HIP 18900 |
13.42 |
| 2026-04-12 00:00 |
04:03:59.73 |
+52:26:21.5 |
HIP 18900 |
14.14 |
| 2026-04-12 12:00 |
04:04:04.76 |
+52:26:01.0 |
HIP 18900 |
14.88 |
| 2026-04-13 00:00 |
04:04:09.83 |
+52:25:40.8 |
HIP 18900 |
15.62 |
| 2026-04-13 12:00 |
04:04:14.93 |
+52:25:20.9 |
HIP 18900 |
16.38 |
| 2026-04-14 00:00 |
04:04:20.06 |
+52:25:01.2 |
HIP 18900 |
17.14 |
| 2026-04-14 12:00 |
04:04:25.23 |
+52:24:41.8 |
HIP 18900 |
17.91 |
| 2026-04-15 00:00 |
04:04:30.43 |
+52:24:22.7 |
HIP 18948 |
18.62 |
| 2026-04-15 12:00 |
04:04:35.67 |
+52:24:03.9 |
HIP 18948 |
18.70 |
| 2026-04-16 00:00 |
04:04:40.93 |
+52:23:45.4 |
HIP 18948 |
18.82 |