메타데이터
| 항목 |
값 |
| Designation |
2P/Encke |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-10-22T03:35:18.398400Z |
| Orbit solution date (soln_date, UTC) |
2025-12-15T09:34:26Z |
| Obs used |
640 |
| NEO |
Yes |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-09-25.0000000 |
| e |
0.84774970 |
| q (au) |
0.337948 |
| a (au) |
2.219689 |
| i (deg) |
11.412278 |
| Ω (om, deg) |
334.193585 |
| ω (w, deg) |
187.134246 |
| M (ma, deg) |
243.126069 |
밝기
산란 + 전체 선형
$$
M_a = (13.799 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.799 |
| n |
2.000 |
| gf |
0.999 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
00:50:53.84 |
+10:13:32.6 |
HIP 3960 |
8.33 |
| 2026-06-01 12:00 |
00:51:20.82 |
+10:17:12.2 |
HIP 3960 |
8.63 |
| 2026-06-02 00:00 |
00:51:47.74 |
+10:20:51.8 |
HIP 3960 |
13.92 |
| 2026-06-02 12:00 |
00:52:14.59 |
+10:24:31.2 |
HIP 4065 |
11.66 |
| 2026-06-03 00:00 |
00:52:41.39 |
+10:28:10.5 |
HIP 4065 |
11.45 |
| 2026-06-03 12:00 |
00:53:08.13 |
+10:31:49.7 |
HIP 4065 |
15.47 |
| 2026-06-04 00:00 |
00:53:34.80 |
+10:35:28.8 |
HIP 4065 |
21.44 |
| 2026-06-04 12:00 |
00:54:01.42 |
+10:39:07.8 |
HIP 4065 |
28.14 |
| 2026-06-05 00:00 |
00:54:27.97 |
+10:42:46.7 |
HIP 4221 |
26.25 |
| 2026-06-05 12:00 |
00:54:54.46 |
+10:46:25.4 |
HIP 4221 |
26.19 |
| 2026-06-06 00:00 |
00:55:20.88 |
+10:50:04.0 |
HIP 4221 |
28.15 |
| 2026-06-06 12:00 |
00:55:47.24 |
+10:53:42.5 |
HIP 4221 |
31.77 |
| 2026-06-07 00:00 |
00:56:13.53 |
+10:57:20.9 |
HIP 4461 |
33.24 |
| 2026-06-07 12:00 |
00:56:39.75 |
+11:00:59.1 |
HIP 4461 |
27.52 |
| 2026-06-08 00:00 |
00:57:05.90 |
+11:04:37.2 |
HIP 4461 |
22.79 |
| 2026-06-08 12:00 |
00:57:31.98 |
+11:08:15.2 |
HIP 4461 |
19.75 |
| 2026-06-09 00:00 |
00:57:58.00 |
+11:11:53.0 |
HIP 4461 |
19.19 |
| 2026-06-09 12:00 |
00:58:23.94 |
+11:15:30.7 |
HIP 4461 |
21.30 |
| 2026-06-10 00:00 |
00:58:49.80 |
+11:19:08.2 |
HIP 4461 |
25.40 |
| 2026-06-10 12:00 |
00:59:15.59 |
+11:22:45.6 |
HIP 4461 |
30.70 |
| 2026-06-11 00:00 |
00:59:41.31 |
+11:26:22.8 |
HIP 4765 |
27.52 |
| 2026-06-11 12:00 |
01:00:06.95 |
+11:29:59.8 |
HIP 4765 |
25.24 |
| 2026-06-12 00:00 |
01:00:32.51 |
+11:33:36.7 |
HIP 4687 |
23.00 |
| 2026-06-12 12:00 |
01:00:57.99 |
+11:37:13.4 |
HIP 4775 |
18.48 |
| 2026-06-13 00:00 |
01:01:23.40 |
+11:40:50.0 |
HIP 4775 |
13.93 |
| 2026-06-13 12:00 |
01:01:48.72 |
+11:44:26.3 |
HIP 4775 |
12.25 |
| 2026-06-14 00:00 |
01:02:13.95 |
+11:48:02.5 |
HIP 4775 |
14.43 |
| 2026-06-14 12:00 |
01:02:39.10 |
+11:51:38.5 |
HIP 4775 |
19.17 |
| 2026-06-15 00:00 |
01:03:04.17 |
+11:55:14.4 |
HIP 4775 |
25.05 |
| 2026-06-15 12:00 |
01:03:29.15 |
+11:58:50.0 |
HIP 4775 |
31.42 |
| 2026-06-16 00:00 |
01:03:54.04 |
+12:02:25.4 |
HIP 5117 |
35.47 |
| 2026-06-16 12:00 |
01:04:18.84 |
+12:06:00.7 |
HIP 5117 |
28.76 |
| 2026-06-17 00:00 |
01:04:43.55 |
+12:09:35.7 |
HIP 5117 |
22.27 |
| 2026-06-17 12:00 |
01:05:08.17 |
+12:13:10.5 |
HIP 5117 |
16.24 |
| 2026-06-18 00:00 |
01:05:32.70 |
+12:16:45.2 |
HIP 5117 |
11.37 |
| 2026-06-18 12:00 |
01:05:57.13 |
+12:20:19.6 |
HIP 5117 |
9.61 |
| 2026-06-19 00:00 |
01:06:21.46 |
+12:23:53.8 |
HIP 5117 |
12.30 |
| 2026-06-19 12:00 |
01:06:45.70 |
+12:27:27.8 |
HIP 5117 |
17.48 |
| 2026-06-20 00:00 |
01:07:09.85 |
+12:31:01.6 |
HIP 5117 |
23.54 |
| 2026-06-20 12:00 |
01:07:33.89 |
+12:34:35.1 |
HIP 5407 |
24.73 |
| 2026-06-21 00:00 |
01:07:57.83 |
+12:38:08.5 |
HIP 5407 |
18.21 |
| 2026-06-21 12:00 |
01:08:21.67 |
+12:41:41.6 |
HIP 5407 |
12.07 |
| 2026-06-22 00:00 |
01:08:45.41 |
+12:45:14.5 |
HIP 5407 |
7.26 |