209P/LINEAR
메타데이터
| 항목 |
값 |
| Designation |
209P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-30T20:16:24.784320Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:39Z |
| Obs used |
2879 |
| NEO |
Yes |
| M1 |
18.100 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-06-09.0000000 |
| e |
0.68144491 |
| q (au) |
0.939590 |
| a (au) |
2.949537 |
| i (deg) |
21.337815 |
| Ω (om, deg) |
62.868525 |
| ω (w, deg) |
152.634859 |
| M (ma, deg) |
225.583149 |
밝기
산란 + 전체 선형
$$
M_a = (17.965 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.965 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.542 |
| k |
0.800 |
| 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) |
| 2026-02-03 00:00 |
00:46:43.79 |
-10:04:29.8 |
HIP 3630 |
30.21 |
| 2026-02-03 12:00 |
00:47:01.86 |
-10:00:54.5 |
HIP 3630 |
27.52 |
| 2026-02-04 00:00 |
00:47:20.04 |
-09:57:19.2 |
HIP 3630 |
25.85 |
| 2026-02-04 12:00 |
00:47:38.32 |
-09:53:44.0 |
HIP 3630 |
25.41 |
| 2026-02-05 00:00 |
00:47:56.71 |
-09:50:08.9 |
HIP 3630 |
26.29 |
| 2026-02-05 12:00 |
00:48:15.19 |
-09:46:33.8 |
HIP 3734 |
26.12 |
| 2026-02-06 00:00 |
00:48:33.77 |
-09:42:58.7 |
HIP 3734 |
23.92 |
| 2026-02-06 12:00 |
00:48:52.45 |
-09:39:23.8 |
HIP 3734 |
23.03 |
| 2026-02-07 00:00 |
00:49:11.22 |
-09:35:48.9 |
HIP 3734 |
23.61 |
| 2026-02-07 12:00 |
00:49:30.09 |
-09:32:14.1 |
HIP 3916 |
24.89 |
| 2026-02-08 00:00 |
00:49:49.06 |
-09:28:39.3 |
HIP 3995 |
22.81 |
| 2026-02-08 12:00 |
00:50:08.12 |
-09:25:04.7 |
HIP 3995 |
17.72 |
| 2026-02-09 00:00 |
00:50:27.27 |
-09:21:30.1 |
HIP 3995 |
13.28 |
| 2026-02-09 12:00 |
00:50:46.52 |
-09:17:55.7 |
HIP 3995 |
10.43 |
| 2026-02-10 00:00 |
00:51:05.86 |
-09:14:21.3 |
HIP 3995 |
10.56 |
| 2026-02-10 12:00 |
00:51:25.28 |
-09:10:47.1 |
HIP 3995 |
13.61 |
| 2026-02-11 00:00 |
00:51:44.80 |
-09:07:12.9 |
HIP 3995 |
18.19 |
| 2026-02-11 12:00 |
00:52:04.41 |
-09:03:38.9 |
HIP 4137 |
15.05 |
| 2026-02-12 00:00 |
00:52:24.10 |
-09:00:05.0 |
HIP 4137 |
9.04 |
| 2026-02-12 12:00 |
00:52:43.88 |
-08:56:31.2 |
HIP 4137 |
3.08 |
| 2026-02-13 00:00 |
00:53:03.74 |
-08:52:57.6 |
HIP 4137 |
3.23 |
| 2026-02-13 12:00 |
00:53:23.70 |
-08:49:24.0 |
HIP 4137 |
9.23 |
| 2026-02-14 00:00 |
00:53:43.73 |
-08:45:50.7 |
HIP 4257 |
8.48 |
| 2026-02-14 12:00 |
00:54:03.85 |
-08:42:17.4 |
HIP 4257 |
4.01 |
| 2026-02-15 00:00 |
00:54:24.05 |
-08:38:44.4 |
HIP 4257 |
5.91 |
| 2026-02-15 12:00 |
00:54:44.33 |
-08:35:11.4 |
HIP 4257 |
11.36 |
| 2026-02-16 00:00 |
00:55:04.69 |
-08:31:38.7 |
HIP 4257 |
17.29 |
| 2026-02-16 12:00 |
00:55:25.13 |
-08:28:06.1 |
HIP 4257 |
23.36 |
| 2026-02-17 00:00 |
00:55:45.65 |
-08:24:33.7 |
HIP 4342 |
21.40 |
| 2026-02-17 12:00 |
00:56:06.25 |
-08:21:01.5 |
HIP 4342 |
18.93 |
| 2026-02-18 00:00 |
00:56:26.92 |
-08:17:29.4 |
HIP 4380 |
16.73 |
| 2026-02-18 12:00 |
00:56:47.67 |
-08:13:57.5 |
HIP 4380 |
15.89 |
| 2026-02-19 00:00 |
00:57:08.49 |
-08:10:25.9 |
HIP 4380 |
17.41 |
| 2026-02-19 12:00 |
00:57:29.39 |
-08:06:54.4 |
HIP 4380 |
20.81 |
| 2026-02-20 00:00 |
00:57:50.36 |
-08:03:23.1 |
HIP 4380 |
25.34 |
| 2026-02-20 12:00 |
00:58:11.40 |
-07:59:52.1 |
HIP 4380 |
30.51 |
| 2026-02-21 00:00 |
00:58:32.51 |
-07:56:21.2 |
HIP 4657 |
30.12 |
| 2026-02-21 12:00 |
00:58:53.69 |
-07:52:50.6 |
HIP 4657 |
30.09 |
| 2026-02-22 00:00 |
00:59:14.94 |
-07:49:20.2 |
HIP 4657 |
31.35 |
| 2026-02-22 12:00 |
00:59:36.25 |
-07:45:50.1 |
HIP 4657 |
33.76 |
| 2026-02-23 00:00 |
00:59:57.63 |
-07:42:20.2 |
HIP 4657 |
37.10 |
| 2026-02-23 12:00 |
01:00:19.08 |
-07:38:50.5 |
HIP 4854 |
39.07 |
| 2026-02-24 00:00 |
01:00:40.60 |
-07:35:21.1 |
HIP 4854 |
37.24 |