메타데이터
| 항목 |
값 |
| Designation |
489P/Denning |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-04-20T21:15:31.694400Z |
| Orbit solution date (soln_date, UTC) |
2024-10-11T13:45:58Z |
| Obs used |
302 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
49.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2007-04-17T03:02:00.096000Z |
| Discovery magnitude (MPC) |
18.70 |
| Discovery observatory (MPC) |
704 · Lincoln Laboratory ETS, New Mexico |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-08-18.0000000 |
| e |
0.64560760 |
| q (au) |
1.574689 |
| a (au) |
4.443348 |
| i (deg) |
4.007070 |
| Ω (om, deg) |
22.578905 |
| ω (w, deg) |
107.960844 |
| M (ma, deg) |
180.384811 |
밝기
산란 + 전체 선형
$$
M_a = (13.591 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.591 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
12:47:20.91 |
-06:31:36.0 |
HIP 62421 |
13.85 |
| 2026-06-01 12:00 |
12:47:34.06 |
-06:33:32.2 |
HIP 62421 |
15.44 |
| 2026-06-02 00:00 |
12:47:47.50 |
-06:35:29.8 |
HIP 62421 |
17.75 |
| 2026-06-02 12:00 |
12:48:01.22 |
-06:37:28.7 |
HIP 62421 |
20.57 |
| 2026-06-03 00:00 |
12:48:15.23 |
-06:39:29.0 |
HIP 62421 |
23.77 |
| 2026-06-03 12:00 |
12:48:29.52 |
-06:41:30.6 |
HIP 62605 |
21.40 |
| 2026-06-04 00:00 |
12:48:44.09 |
-06:43:33.5 |
HIP 62605 |
17.25 |
| 2026-06-04 12:00 |
12:48:58.94 |
-06:45:37.7 |
HIP 62605 |
13.03 |
| 2026-06-05 00:00 |
12:49:14.07 |
-06:47:43.1 |
HIP 62605 |
8.75 |
| 2026-06-05 12:00 |
12:49:29.46 |
-06:49:49.9 |
HIP 62605 |
4.44 |
| 2026-06-06 00:00 |
12:49:45.13 |
-06:51:57.9 |
HIP 62605 |
1.03 |
| 2026-06-06 12:00 |
12:50:01.07 |
-06:54:07.1 |
HIP 62605 |
4.74 |
| 2026-06-07 00:00 |
12:50:17.27 |
-06:56:17.6 |
HIP 62605 |
9.26 |
| 2026-06-07 12:00 |
12:50:33.73 |
-06:58:29.4 |
HIP 62727 |
10.26 |
| 2026-06-08 00:00 |
12:50:50.46 |
-07:00:42.3 |
HIP 62727 |
7.18 |
| 2026-06-08 12:00 |
12:51:07.44 |
-07:02:56.5 |
HIP 62727 |
6.48 |
| 2026-06-09 00:00 |
12:51:24.68 |
-07:05:11.8 |
HIP 62727 |
8.87 |
| 2026-06-09 12:00 |
12:51:42.17 |
-07:07:28.3 |
HIP 62727 |
12.78 |
| 2026-06-10 00:00 |
12:51:59.92 |
-07:09:46.0 |
HIP 62851 |
14.53 |
| 2026-06-10 12:00 |
12:52:17.92 |
-07:12:04.9 |
HIP 62851 |
10.88 |
| 2026-06-11 00:00 |
12:52:36.16 |
-07:14:24.9 |
HIP 62851 |
8.72 |
| 2026-06-11 12:00 |
12:52:54.65 |
-07:16:46.1 |
HIP 62851 |
9.26 |
| 2026-06-12 00:00 |
12:53:13.39 |
-07:19:08.4 |
HIP 62851 |
12.22 |
| 2026-06-12 12:00 |
12:53:32.36 |
-07:21:31.8 |
HIP 62851 |
16.40 |
| 2026-06-13 00:00 |
12:53:51.58 |
-07:23:56.4 |
HIP 62991 |
15.41 |
| 2026-06-13 12:00 |
12:54:11.03 |
-07:26:22.0 |
HIP 62991 |
10.98 |
| 2026-06-14 00:00 |
12:54:30.72 |
-07:28:48.8 |
HIP 62991 |
7.87 |
| 2026-06-14 12:00 |
12:54:50.65 |
-07:31:16.6 |
HIP 62991 |
7.95 |
| 2026-06-15 00:00 |
12:55:10.80 |
-07:33:45.5 |
HIP 62991 |
11.25 |
| 2026-06-15 12:00 |
12:55:31.19 |
-07:36:15.4 |
HIP 62991 |
15.94 |
| 2026-06-16 00:00 |
12:55:51.80 |
-07:38:46.4 |
HIP 62991 |
21.15 |
| 2026-06-16 12:00 |
12:56:12.64 |
-07:41:18.4 |
HIP 62991 |
26.62 |
| 2026-06-17 00:00 |
12:56:33.70 |
-07:43:51.5 |
HIP 62991 |
32.24 |
| 2026-06-17 12:00 |
12:56:54.98 |
-07:46:25.6 |
HIP 62991 |
37.98 |
| 2026-06-18 00:00 |
12:57:16.48 |
-07:49:00.6 |
HIP 63270 |
41.66 |
| 2026-06-18 12:00 |
12:57:38.20 |
-07:51:36.7 |
HIP 63270 |
43.36 |
| 2026-06-19 00:00 |
12:58:00.13 |
-07:54:13.7 |
HIP 63270 |
45.79 |
| 2026-06-19 12:00 |
12:58:22.27 |
-07:56:51.7 |
HIP 63362 |
48.36 |
| 2026-06-20 00:00 |
12:58:44.62 |
-07:59:30.6 |
HIP 63362 |
44.97 |
| 2026-06-20 12:00 |
12:59:07.18 |
-08:02:10.5 |
HIP 63548 |
40.78 |
| 2026-06-21 00:00 |
12:59:29.95 |
-08:04:51.2 |
HIP 63548 |
34.68 |
| 2026-06-21 12:00 |
12:59:52.91 |
-08:07:32.9 |
HIP 63548 |
28.59 |
| 2026-06-22 00:00 |
13:00:16.08 |
-08:10:15.4 |
HIP 63548 |
22.56 |