메타데이터
| 항목 |
값 |
| Designation |
218P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-04-23T10:15:17.579520Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T14:14:29Z |
| Obs used |
502 |
| NEO |
Yes |
| M1 |
15.500 |
| K1 |
13.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-06-19.0000000 |
| e |
0.62192435 |
| q (au) |
1.170687 |
| a (au) |
3.096435 |
| i (deg) |
2.725401 |
| Ω (om, deg) |
176.028760 |
| ω (w, deg) |
59.668585 |
| M (ma, deg) |
142.462911 |
밝기
산란 + 전체 선형
$$
M_a = (16.039 + 3.360\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.039 |
| n |
3.360 |
| gf |
0.978 |
| gb |
-1.000 |
| k |
0.991 |
| δ90 |
9.447 |
| 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) |
| 2026-03-26 00:00 |
20:30:30.30 |
-16:27:00.2 |
HIP 101190 |
6.44 |
| 2026-03-26 12:00 |
20:32:19.21 |
-16:20:12.9 |
HIP 101357 |
16.63 |
| 2026-03-27 00:00 |
20:34:07.56 |
-16:13:23.7 |
HIP 101409 |
19.17 |
| 2026-03-27 12:00 |
20:35:55.35 |
-16:06:32.6 |
HIP 101555 |
24.42 |
| 2026-03-28 00:00 |
20:37:42.57 |
-15:59:39.7 |
HIP 101740 |
34.89 |
| 2026-03-28 12:00 |
20:39:29.22 |
-15:52:45.1 |
HIP 102026 |
21.17 |
| 2026-03-29 00:00 |
20:41:15.32 |
-15:45:48.9 |
HIP 102213 |
20.86 |
| 2026-03-29 12:00 |
20:43:00.85 |
-15:38:51.1 |
HIP 102213 |
5.47 |
| 2026-03-30 00:00 |
20:44:45.82 |
-15:31:51.8 |
HIP 102419 |
17.50 |
| 2026-03-30 12:00 |
20:46:30.22 |
-15:24:51.0 |
HIP 102591 |
18.26 |
| 2026-03-31 00:00 |
20:48:14.07 |
-15:17:48.9 |
HIP 102591 |
22.20 |
| 2026-03-31 12:00 |
20:49:57.37 |
-15:10:45.5 |
HIP 102875 |
21.95 |
| 2026-04-01 00:00 |
20:51:40.10 |
-15:03:40.9 |
HIP 102875 |
31.11 |
| 2026-04-01 12:00 |
20:53:22.28 |
-14:56:35.1 |
HIP 103240 |
30.47 |
| 2026-04-02 00:00 |
20:55:03.91 |
-14:49:28.2 |
HIP 103283 |
13.93 |
| 2026-04-02 12:00 |
20:56:44.98 |
-14:42:20.2 |
HIP 103283 |
19.14 |
| 2026-04-03 00:00 |
20:58:25.50 |
-14:35:11.3 |
HIP 103545 |
7.36 |
| 2026-04-03 12:00 |
21:00:05.47 |
-14:28:01.5 |
HIP 103545 |
20.26 |
| 2026-04-04 00:00 |
21:01:44.90 |
-14:20:50.9 |
HIP 103907 |
36.08 |
| 2026-04-04 12:00 |
21:03:23.77 |
-14:13:39.5 |
HIP 103907 |
36.35 |
| 2026-04-05 00:00 |
21:05:02.10 |
-14:06:27.4 |
HIP 104239 |
32.98 |
| 2026-04-05 12:00 |
21:06:39.88 |
-13:59:14.6 |
HIP 104239 |
8.30 |
| 2026-04-06 00:00 |
21:08:17.12 |
-13:52:01.2 |
HIP 104239 |
16.59 |
| 2026-04-06 12:00 |
21:09:53.81 |
-13:44:47.3 |
HIP 104456 |
22.68 |
| 2026-04-07 00:00 |
21:11:29.97 |
-13:37:32.9 |
HIP 104493 |
34.38 |
| 2026-04-07 12:00 |
21:13:05.58 |
-13:30:18.0 |
HIP 104806 |
17.50 |
| 2026-04-08 00:00 |
21:14:40.66 |
-13:23:02.9 |
HIP 104806 |
20.70 |
| 2026-04-08 12:00 |
21:16:15.20 |
-13:15:47.4 |
HIP 105002 |
5.26 |
| 2026-04-09 00:00 |
21:17:49.20 |
-13:08:31.7 |
HIP 105079 |
11.95 |
| 2026-04-09 12:00 |
21:19:22.67 |
-13:01:15.8 |
HIP 105267 |
1.70 |
| 2026-04-10 00:00 |
21:20:55.61 |
-12:53:59.7 |
HIP 105385 |
2.29 |
| 2026-04-10 12:00 |
21:22:28.02 |
-12:46:43.6 |
HIP 105385 |
25.48 |
| 2026-04-11 00:00 |
21:23:59.89 |
-12:39:27.4 |
HIP 105668 |
13.53 |
| 2026-04-11 12:00 |
21:25:31.24 |
-12:32:11.3 |
HIP 105668 |
28.27 |
| 2026-04-12 00:00 |
21:27:02.06 |
-12:24:55.2 |
HIP 105856 |
21.24 |
| 2026-04-12 12:00 |
21:28:32.35 |
-12:17:39.3 |
HIP 105999 |
22.94 |
| 2026-04-13 00:00 |
21:30:02.12 |
-12:10:23.6 |
HIP 106147 |
20.17 |
| 2026-04-13 12:00 |
21:31:31.36 |
-12:03:08.1 |
HIP 106281 |
6.91 |
| 2026-04-14 00:00 |
21:33:00.09 |
-11:55:52.9 |
HIP 106347 |
13.18 |
| 2026-04-14 12:00 |
21:34:28.29 |
-11:48:38.0 |
HIP 106609 |
15.81 |
| 2026-04-15 00:00 |
21:35:55.98 |
-11:41:23.5 |
HIP 106609 |
7.96 |
| 2026-04-15 12:00 |
21:37:23.14 |
-11:34:09.4 |
HIP 106739 |
6.56 |
| 2026-04-16 00:00 |
21:38:49.79 |
-11:26:55.8 |
HIP 106988 |
20.05 |