메타데이터
| 항목 |
값 |
| Designation |
225P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-08-16T11:23:49.657920Z |
| Orbit solution date (soln_date, UTC) |
2024-02-21T09:12:25Z |
| Obs used |
519 |
| NEO |
- |
| M1 |
19.200 |
| K1 |
5.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-01-01.0000000 |
| e |
0.63742487 |
| q (au) |
1.323935 |
| a (au) |
3.651479 |
| i (deg) |
21.343082 |
| Ω (om, deg) |
14.181870 |
| ω (w, deg) |
3.875149 |
| M (ma, deg) |
174.099157 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.575 |
| k |
0.801 |
| 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) |
| 2026-09-20 00:00 |
12:39:17.17 |
-03:42:41.3 |
HIP 61695 |
25.24 |
| 2026-09-20 12:00 |
12:39:35.58 |
-03:45:04.4 |
HIP 61695 |
29.10 |
| 2026-09-21 00:00 |
12:39:54.01 |
-03:47:27.6 |
HIP 61921 |
25.98 |
| 2026-09-21 12:00 |
12:40:12.46 |
-03:49:50.8 |
HIP 61921 |
20.79 |
| 2026-09-22 00:00 |
12:40:30.94 |
-03:52:14.0 |
HIP 61921 |
15.60 |
| 2026-09-22 12:00 |
12:40:49.43 |
-03:54:37.3 |
HIP 61921 |
10.41 |
| 2026-09-23 00:00 |
12:41:07.94 |
-03:57:00.7 |
HIP 61921 |
5.21 |
| 2026-09-23 12:00 |
12:41:26.47 |
-03:59:24.1 |
HIP 61921 |
0.27 |
| 2026-09-24 00:00 |
12:41:45.01 |
-04:01:47.6 |
HIP 61921 |
5.21 |
| 2026-09-24 12:00 |
12:42:03.58 |
-04:04:11.1 |
HIP 61921 |
10.42 |
| 2026-09-25 00:00 |
12:42:22.16 |
-04:06:34.6 |
HIP 62039 |
9.99 |
| 2026-09-25 12:00 |
12:42:40.75 |
-04:08:58.2 |
HIP 62039 |
7.63 |
| 2026-09-26 00:00 |
12:42:59.36 |
-04:11:21.8 |
HIP 62039 |
8.43 |
| 2026-09-26 12:00 |
12:43:17.99 |
-04:13:45.4 |
HIP 62039 |
11.77 |
| 2026-09-27 00:00 |
12:43:36.63 |
-04:16:09.1 |
HIP 62039 |
16.14 |
| 2026-09-27 12:00 |
12:43:55.29 |
-04:18:32.8 |
HIP 62039 |
20.92 |
| 2026-09-28 00:00 |
12:44:13.95 |
-04:20:56.5 |
HIP 62039 |
25.87 |
| 2026-09-28 12:00 |
12:44:32.63 |
-04:23:20.2 |
HIP 62260 |
29.33 |
| 2026-09-29 00:00 |
12:44:51.33 |
-04:25:43.9 |
HIP 62260 |
25.07 |
| 2026-09-29 12:00 |
12:45:10.03 |
-04:28:07.7 |
HIP 62260 |
21.25 |
| 2026-09-30 00:00 |
12:45:28.75 |
-04:30:31.5 |
HIP 62260 |
18.15 |
| 2026-09-30 12:00 |
12:45:47.48 |
-04:32:55.2 |
HIP 62260 |
16.20 |
| 2026-10-01 00:00 |
12:46:06.22 |
-04:35:19.0 |
HIP 62260 |
15.83 |
| 2026-10-01 12:00 |
12:46:24.96 |
-04:37:42.7 |
HIP 62260 |
17.14 |
| 2026-10-02 00:00 |
12:46:43.72 |
-04:40:06.5 |
HIP 62422 |
12.59 |
| 2026-10-02 12:00 |
12:47:02.49 |
-04:42:30.3 |
HIP 62422 |
8.06 |
| 2026-10-03 00:00 |
12:47:21.26 |
-04:44:54.0 |
HIP 62422 |
5.15 |
| 2026-10-03 12:00 |
12:47:40.04 |
-04:47:17.7 |
HIP 62422 |
6.59 |
| 2026-10-04 00:00 |
12:47:58.83 |
-04:49:41.4 |
HIP 62422 |
10.75 |
| 2026-10-04 12:00 |
12:48:17.62 |
-04:52:05.1 |
HIP 62422 |
15.59 |
| 2026-10-05 00:00 |
12:48:36.42 |
-04:54:28.8 |
HIP 62422 |
20.64 |
| 2026-10-05 12:00 |
12:48:55.23 |
-04:56:52.4 |
HIP 62422 |
25.77 |
| 2026-10-06 00:00 |
12:49:14.04 |
-04:59:16.0 |
HIP 62693 |
23.54 |
| 2026-10-06 12:00 |
12:49:32.85 |
-05:01:39.6 |
HIP 62693 |
18.62 |
| 2026-10-07 00:00 |
12:49:51.66 |
-05:04:03.1 |
HIP 62693 |
13.95 |
| 2026-10-07 12:00 |
12:50:10.48 |
-05:06:26.5 |
HIP 62693 |
9.89 |
| 2026-10-08 00:00 |
12:50:29.30 |
-05:08:50.0 |
HIP 62693 |
7.52 |
| 2026-10-08 12:00 |
12:50:48.12 |
-05:11:13.3 |
HIP 62693 |
8.39 |
| 2026-10-09 00:00 |
12:51:06.94 |
-05:13:36.6 |
HIP 62693 |
11.82 |
| 2026-10-09 12:00 |
12:51:25.77 |
-05:15:59.9 |
HIP 62693 |
16.26 |
| 2026-10-10 00:00 |
12:51:44.58 |
-05:18:23.1 |
HIP 62693 |
21.07 |
| 2026-10-10 12:00 |
12:52:03.40 |
-05:20:46.2 |
HIP 62693 |
26.06 |
| 2026-10-11 00:00 |
12:52:22.22 |
-05:23:09.2 |
HIP 62898 |
27.95 |