메타데이터
| 항목 |
값 |
| Designation |
187P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-10-22T14:00:37.010880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:27:48Z |
| Obs used |
296 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
16.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-02-09.0000000 |
| e |
0.17318236 |
| q (au) |
3.715328 |
| a (au) |
4.493528 |
| i (deg) |
13.655086 |
| Ω (om, deg) |
111.736093 |
| ω (w, deg) |
134.735817 |
| M (ma, deg) |
86.856101 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
10:06:39.11 |
+23:18:35.3 |
HIP 49570 |
19.07 |
| 2026-05-12 12:00 |
10:06:48.51 |
+23:17:04.4 |
HIP 49570 |
19.85 |
| 2026-05-13 00:00 |
10:06:58.11 |
+23:15:32.5 |
HIP 49570 |
20.94 |
| 2026-05-13 12:00 |
10:07:07.92 |
+23:13:59.5 |
HIP 49570 |
22.32 |
| 2026-05-14 00:00 |
10:07:17.93 |
+23:12:25.5 |
HIP 49570 |
23.96 |
| 2026-05-14 12:00 |
10:07:28.14 |
+23:10:50.4 |
HIP 49700 |
25.09 |
| 2026-05-15 00:00 |
10:07:38.55 |
+23:09:14.4 |
HIP 49700 |
24.74 |
| 2026-05-15 12:00 |
10:07:49.17 |
+23:07:37.3 |
HIP 49700 |
24.71 |
| 2026-05-16 00:00 |
10:07:59.98 |
+23:05:59.2 |
HIP 49700 |
25.01 |
| 2026-05-16 12:00 |
10:08:11.00 |
+23:04:20.0 |
HIP 49700 |
25.67 |
| 2026-05-17 00:00 |
10:08:22.21 |
+23:02:39.9 |
HIP 49700 |
26.65 |
| 2026-05-17 12:00 |
10:08:33.62 |
+23:00:58.8 |
HIP 49700 |
27.96 |
| 2026-05-18 00:00 |
10:08:45.23 |
+22:59:16.8 |
HIP 49700 |
29.55 |
| 2026-05-18 12:00 |
10:08:57.03 |
+22:57:33.7 |
HIP 49700 |
31.40 |
| 2026-05-19 00:00 |
10:09:09.02 |
+22:55:49.7 |
HIP 49700 |
33.48 |
| 2026-05-19 12:00 |
10:09:21.21 |
+22:54:04.7 |
HIP 49700 |
35.77 |
| 2026-05-20 00:00 |
10:09:33.59 |
+22:52:18.8 |
HIP 49700 |
38.23 |
| 2026-05-20 12:00 |
10:09:46.16 |
+22:50:31.9 |
HIP 49700 |
40.85 |
| 2026-05-21 00:00 |
10:09:58.91 |
+22:48:44.1 |
HIP 50048 |
43.05 |
| 2026-05-21 12:00 |
10:10:11.86 |
+22:46:55.4 |
HIP 50048 |
40.28 |
| 2026-05-22 00:00 |
10:10:24.99 |
+22:45:05.8 |
HIP 50048 |
37.58 |
| 2026-05-22 12:00 |
10:10:38.31 |
+22:43:15.2 |
HIP 50048 |
34.99 |
| 2026-05-23 00:00 |
10:10:51.81 |
+22:41:23.8 |
HIP 50048 |
32.56 |
| 2026-05-23 12:00 |
10:11:05.49 |
+22:39:31.4 |
HIP 50048 |
30.33 |
| 2026-05-24 00:00 |
10:11:19.35 |
+22:37:38.2 |
HIP 50048 |
28.38 |
| 2026-05-24 12:00 |
10:11:33.40 |
+22:35:44.1 |
HIP 50048 |
26.77 |
| 2026-05-25 00:00 |
10:11:47.62 |
+22:33:49.2 |
HIP 50048 |
25.60 |
| 2026-05-25 12:00 |
10:12:02.02 |
+22:31:53.3 |
HIP 50048 |
24.94 |
| 2026-05-26 00:00 |
10:12:16.60 |
+22:29:56.6 |
HIP 50130 |
24.44 |
| 2026-05-26 12:00 |
10:12:31.35 |
+22:27:59.1 |
HIP 50130 |
20.91 |
| 2026-05-27 00:00 |
10:12:46.28 |
+22:26:00.7 |
HIP 50130 |
17.51 |
| 2026-05-27 12:00 |
10:13:01.38 |
+22:24:01.5 |
HIP 50130 |
14.37 |
| 2026-05-28 00:00 |
10:13:16.65 |
+22:22:01.5 |
HIP 50130 |
11.74 |
| 2026-05-28 12:00 |
10:13:32.09 |
+22:20:00.6 |
HIP 50130 |
10.09 |
| 2026-05-29 00:00 |
10:13:47.70 |
+22:17:58.9 |
HIP 50130 |
9.97 |
| 2026-05-29 12:00 |
10:14:03.48 |
+22:15:56.4 |
HIP 50130 |
11.47 |
| 2026-05-30 00:00 |
10:14:19.43 |
+22:13:53.1 |
HIP 50130 |
14.12 |
| 2026-05-30 12:00 |
10:14:35.54 |
+22:11:49.0 |
HIP 50130 |
17.43 |
| 2026-05-31 00:00 |
10:14:51.81 |
+22:09:44.1 |
HIP 50130 |
21.11 |
| 2026-05-31 12:00 |
10:15:08.26 |
+22:07:38.4 |
HIP 50130 |
25.03 |
| 2026-06-01 00:00 |
10:15:24.86 |
+22:05:32.0 |
HIP 50364 |
24.61 |
| 2026-06-01 12:00 |
10:15:41.62 |
+22:03:24.7 |
HIP 50364 |
20.19 |
| 2026-06-02 00:00 |
10:15:58.55 |
+22:01:16.7 |
HIP 50364 |
15.74 |