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 |
0.802 |
| δ90 |
9.999 |
| 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) |
| 2026-05-12 00:00 |
12:04:02.39 |
+02:43:36.7 |
HIP 58881 |
27.49 |
| 2026-05-12 12:00 |
12:03:53.06 |
+02:43:48.4 |
HIP 58881 |
28.14 |
| 2026-05-13 00:00 |
12:03:43.89 |
+02:43:59.0 |
HIP 58881 |
28.95 |
| 2026-05-13 12:00 |
12:03:34.88 |
+02:44:08.6 |
HIP 58881 |
29.91 |
| 2026-05-14 00:00 |
12:03:26.04 |
+02:44:17.2 |
HIP 58881 |
30.99 |
| 2026-05-14 12:00 |
12:03:17.36 |
+02:44:24.8 |
HIP 58881 |
32.18 |
| 2026-05-15 00:00 |
12:03:08.85 |
+02:44:31.3 |
HIP 58881 |
33.46 |
| 2026-05-15 12:00 |
12:03:00.50 |
+02:44:36.8 |
HIP 58643 |
32.25 |
| 2026-05-16 00:00 |
12:02:52.32 |
+02:44:41.3 |
HIP 58643 |
30.90 |
| 2026-05-16 12:00 |
12:02:44.30 |
+02:44:44.7 |
HIP 58643 |
29.64 |
| 2026-05-17 00:00 |
12:02:36.45 |
+02:44:47.1 |
HIP 58643 |
28.47 |
| 2026-05-17 12:00 |
12:02:28.77 |
+02:44:48.5 |
HIP 58643 |
27.41 |
| 2026-05-18 00:00 |
12:02:21.26 |
+02:44:48.8 |
HIP 58643 |
26.45 |
| 2026-05-18 12:00 |
12:02:13.91 |
+02:44:48.0 |
HIP 58643 |
25.59 |
| 2026-05-19 00:00 |
12:02:06.73 |
+02:44:46.3 |
HIP 58643 |
24.83 |
| 2026-05-19 12:00 |
12:01:59.72 |
+02:44:43.5 |
HIP 58643 |
24.19 |
| 2026-05-20 00:00 |
12:01:52.88 |
+02:44:39.6 |
HIP 58643 |
23.65 |
| 2026-05-20 12:00 |
12:01:46.21 |
+02:44:34.8 |
HIP 58643 |
23.21 |
| 2026-05-21 00:00 |
12:01:39.70 |
+02:44:28.9 |
HIP 58643 |
22.87 |
| 2026-05-21 12:00 |
12:01:33.37 |
+02:44:21.9 |
HIP 58643 |
22.64 |
| 2026-05-22 00:00 |
12:01:27.20 |
+02:44:14.0 |
HIP 58643 |
22.49 |
| 2026-05-22 12:00 |
12:01:21.20 |
+02:44:05.0 |
HIP 58643 |
22.43 |
| 2026-05-23 00:00 |
12:01:15.37 |
+02:43:55.0 |
HIP 58643 |
22.44 |
| 2026-05-23 12:00 |
12:01:09.71 |
+02:43:44.0 |
HIP 58643 |
22.53 |
| 2026-05-24 00:00 |
12:01:04.22 |
+02:43:31.9 |
HIP 58643 |
22.67 |
| 2026-05-24 12:00 |
12:00:58.90 |
+02:43:18.9 |
HIP 58643 |
22.87 |
| 2026-05-25 00:00 |
12:00:53.74 |
+02:43:04.8 |
HIP 58643 |
23.12 |
| 2026-05-25 12:00 |
12:00:48.75 |
+02:42:49.7 |
HIP 58472 |
22.75 |
| 2026-05-26 00:00 |
12:00:43.93 |
+02:42:33.6 |
HIP 58472 |
21.83 |
| 2026-05-26 12:00 |
12:00:39.28 |
+02:42:16.6 |
HIP 58472 |
20.97 |
| 2026-05-27 00:00 |
12:00:34.80 |
+02:41:58.5 |
HIP 58472 |
20.20 |
| 2026-05-27 12:00 |
12:00:30.48 |
+02:41:39.4 |
HIP 58472 |
19.51 |
| 2026-05-28 00:00 |
12:00:26.33 |
+02:41:19.3 |
HIP 58472 |
18.90 |
| 2026-05-28 12:00 |
12:00:22.35 |
+02:40:58.2 |
HIP 58472 |
18.38 |
| 2026-05-29 00:00 |
12:00:18.53 |
+02:40:36.1 |
HIP 58472 |
17.94 |
| 2026-05-29 12:00 |
12:00:14.88 |
+02:40:13.1 |
HIP 58472 |
17.60 |
| 2026-05-30 00:00 |
12:00:11.40 |
+02:39:49.0 |
HIP 58472 |
17.34 |
| 2026-05-30 12:00 |
12:00:08.08 |
+02:39:24.0 |
HIP 58472 |
17.17 |
| 2026-05-31 00:00 |
12:00:04.93 |
+02:38:58.0 |
HIP 58472 |
17.09 |
| 2026-05-31 12:00 |
12:00:01.94 |
+02:38:31.0 |
HIP 58472 |
17.08 |
| 2026-06-01 00:00 |
11:59:59.12 |
+02:38:03.1 |
HIP 58472 |
17.16 |
| 2026-06-01 12:00 |
11:59:56.47 |
+02:37:34.2 |
HIP 58472 |
17.31 |
| 2026-06-02 00:00 |
11:59:53.98 |
+02:37:04.3 |
HIP 58472 |
17.52 |