메타데이터
| 항목 |
값 |
| Designation |
369P/Hill |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-14T18:02:25.463040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:38Z |
| Obs used |
404 |
| NEO |
- |
| M1 |
15.900 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-08-10T04:19:55.200000Z |
| Discovery magnitude (MPC) |
19.00 N |
| Discovery observatory (MPC) |
J04 · ESA Optical Ground Station, Tenerife |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-03-03.0000000 |
| e |
0.55464071 |
| q (au) |
1.952852 |
| a (au) |
4.384892 |
| i (deg) |
10.318441 |
| Ω (om, deg) |
47.369507 |
| ω (w, deg) |
13.332806 |
| M (ma, deg) |
218.121804 |
밝기
산란 + 전체 선형
$$
M_a = (14.079 + 4.801\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.079 |
| n |
4.801 |
| gf |
0.800 |
| gb |
-0.671 |
| k |
0.929 |
| δ90 |
1.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
20:10:32.07 |
-33:15:19.8 |
HIP 99360 |
12.27 |
| 2026-07-29 12:00 |
20:10:07.76 |
-33:16:32.4 |
HIP 99360 |
9.44 |
| 2026-07-30 00:00 |
20:09:43.46 |
-33:17:43.7 |
HIP 99286 |
7.25 |
| 2026-07-30 12:00 |
20:09:19.16 |
-33:18:53.7 |
HIP 99286 |
3.19 |
| 2026-07-31 00:00 |
20:08:54.88 |
-33:20:02.2 |
HIP 99286 |
4.69 |
| 2026-07-31 12:00 |
20:08:30.63 |
-33:21:09.4 |
HIP 99286 |
9.37 |
| 2026-08-01 00:00 |
20:08:06.39 |
-33:22:15.1 |
HIP 99286 |
14.40 |
| 2026-08-01 12:00 |
20:07:42.19 |
-33:23:19.5 |
HIP 99286 |
19.49 |
| 2026-08-02 00:00 |
20:07:18.01 |
-33:24:22.4 |
HIP 99286 |
24.61 |
| 2026-08-02 12:00 |
20:06:53.88 |
-33:25:23.9 |
HIP 99286 |
29.72 |
| 2026-08-03 00:00 |
20:06:29.79 |
-33:26:24.0 |
HIP 98898 |
26.46 |
| 2026-08-03 12:00 |
20:06:05.75 |
-33:27:22.6 |
HIP 98898 |
22.41 |
| 2026-08-04 00:00 |
20:05:41.75 |
-33:28:19.7 |
HIP 98898 |
18.91 |
| 2026-08-04 12:00 |
20:05:17.82 |
-33:29:15.4 |
HIP 98898 |
16.29 |
| 2026-08-05 00:00 |
20:04:53.95 |
-33:30:09.7 |
HIP 98898 |
15.01 |
| 2026-08-05 12:00 |
20:04:30.14 |
-33:31:02.4 |
HIP 98898 |
15.39 |
| 2026-08-06 00:00 |
20:04:06.41 |
-33:31:53.6 |
HIP 98898 |
17.30 |
| 2026-08-06 12:00 |
20:03:42.75 |
-33:32:43.4 |
HIP 98898 |
20.30 |
| 2026-08-07 00:00 |
20:03:19.17 |
-33:33:31.7 |
HIP 98898 |
23.97 |
| 2026-08-07 12:00 |
20:02:55.68 |
-33:34:18.4 |
HIP 98898 |
28.04 |
| 2026-08-08 00:00 |
20:02:32.28 |
-33:35:03.7 |
HIP 98470 |
28.40 |
| 2026-08-08 12:00 |
20:02:08.97 |
-33:35:47.4 |
HIP 98470 |
23.53 |
| 2026-08-09 00:00 |
20:01:45.77 |
-33:36:29.6 |
HIP 98470 |
18.70 |
| 2026-08-09 12:00 |
20:01:22.66 |
-33:37:10.3 |
HIP 98470 |
13.93 |
| 2026-08-10 00:00 |
20:00:59.67 |
-33:37:49.4 |
HIP 98470 |
9.30 |
| 2026-08-10 12:00 |
20:00:36.80 |
-33:38:27.0 |
HIP 98470 |
5.08 |
| 2026-08-11 00:00 |
20:00:14.04 |
-33:39:03.1 |
HIP 98470 |
3.36 |
| 2026-08-11 12:00 |
19:59:51.41 |
-33:39:37.6 |
HIP 98470 |
6.50 |
| 2026-08-12 00:00 |
19:59:28.91 |
-33:40:10.6 |
HIP 98470 |
10.85 |
| 2026-08-12 12:00 |
19:59:06.54 |
-33:40:42.0 |
HIP 98470 |
15.38 |
| 2026-08-13 00:00 |
19:58:44.31 |
-33:41:11.9 |
HIP 98341 |
16.49 |
| 2026-08-13 12:00 |
19:58:22.22 |
-33:41:40.2 |
HIP 98341 |
17.93 |
| 2026-08-14 00:00 |
19:58:00.28 |
-33:42:07.0 |
HIP 98341 |
20.31 |
| 2026-08-14 12:00 |
19:57:38.49 |
-33:42:32.3 |
HIP 98129 |
17.11 |
| 2026-08-15 00:00 |
19:57:16.86 |
-33:42:56.0 |
HIP 98129 |
14.35 |
| 2026-08-15 12:00 |
19:56:55.39 |
-33:43:18.2 |
HIP 98129 |
12.63 |
| 2026-08-16 00:00 |
19:56:34.09 |
-33:43:38.8 |
HIP 98129 |
12.36 |
| 2026-08-16 12:00 |
19:56:12.95 |
-33:43:57.9 |
HIP 98129 |
13.59 |
| 2026-08-17 00:00 |
19:55:51.99 |
-33:44:15.4 |
HIP 98129 |
15.94 |
| 2026-08-17 12:00 |
19:55:31.21 |
-33:44:31.5 |
HIP 98129 |
18.98 |
| 2026-08-18 00:00 |
19:55:10.61 |
-33:44:46.0 |
HIP 98129 |
22.39 |
| 2026-08-18 12:00 |
19:54:50.19 |
-33:44:58.9 |
HIP 98129 |
26.03 |
| 2026-08-19 00:00 |
19:54:29.97 |
-33:45:10.4 |
HIP 97977 |
28.08 |