메타데이터
| 항목 |
값 |
| Designation |
251P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2004-06-19T01:47:38.279040Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:40Z |
| Obs used |
431 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
24.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-04-11.0000000 |
| e |
0.50982311 |
| q (au) |
1.711672 |
| a (au) |
3.491948 |
| i (deg) |
23.507154 |
| Ω (om, deg) |
219.552911 |
| ω (w, deg) |
30.906733 |
| M (ma, deg) |
154.959455 |
밝기
산란 + 전체 선형
$$
M_a = (15.255 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.255 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.719 |
| k |
0.978 |
| 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 |
04:17:56.34 |
+14:10:10.2 |
HIP 20025 |
20.24 |
| 2026-09-20 12:00 |
04:17:54.53 |
+14:08:37.7 |
HIP 20025 |
18.65 |
| 2026-09-21 00:00 |
04:17:52.52 |
+14:07:04.4 |
HIP 20025 |
17.04 |
| 2026-09-21 12:00 |
04:17:50.29 |
+14:05:30.6 |
HIP 20025 |
15.42 |
| 2026-09-22 00:00 |
04:17:47.86 |
+14:03:56.1 |
HIP 20025 |
13.80 |
| 2026-09-22 12:00 |
04:17:45.22 |
+14:02:21.0 |
HIP 20025 |
12.17 |
| 2026-09-23 00:00 |
04:17:42.37 |
+14:00:45.3 |
HIP 20025 |
10.57 |
| 2026-09-23 12:00 |
04:17:39.31 |
+13:59:09.0 |
HIP 20025 |
9.01 |
| 2026-09-24 00:00 |
04:17:36.04 |
+13:57:32.1 |
HIP 20025 |
7.54 |
| 2026-09-24 12:00 |
04:17:32.57 |
+13:55:54.5 |
HIP 20025 |
6.25 |
| 2026-09-25 00:00 |
04:17:28.88 |
+13:54:16.4 |
HIP 20025 |
5.33 |
| 2026-09-25 12:00 |
04:17:24.99 |
+13:52:37.6 |
HIP 20025 |
5.00 |
| 2026-09-26 00:00 |
04:17:20.88 |
+13:50:58.3 |
HIP 20025 |
5.42 |
| 2026-09-26 12:00 |
04:17:16.57 |
+13:49:18.3 |
HIP 20025 |
6.47 |
| 2026-09-27 00:00 |
04:17:12.05 |
+13:47:37.8 |
HIP 20025 |
7.93 |
| 2026-09-27 12:00 |
04:17:07.32 |
+13:45:56.7 |
HIP 20025 |
9.64 |
| 2026-09-28 00:00 |
04:17:02.38 |
+13:44:15.0 |
HIP 20025 |
11.51 |
| 2026-09-28 12:00 |
04:16:57.23 |
+13:42:32.7 |
HIP 20025 |
13.48 |
| 2026-09-29 00:00 |
04:16:51.88 |
+13:40:49.9 |
HIP 20025 |
15.54 |
| 2026-09-29 12:00 |
04:16:46.32 |
+13:39:06.5 |
HIP 20025 |
17.67 |
| 2026-09-30 00:00 |
04:16:40.54 |
+13:37:22.5 |
HIP 20025 |
19.85 |
| 2026-09-30 12:00 |
04:16:34.56 |
+13:35:38.0 |
HIP 20025 |
22.09 |
| 2026-10-01 00:00 |
04:16:28.38 |
+13:33:52.9 |
HIP 20025 |
24.38 |
| 2026-10-01 12:00 |
04:16:21.98 |
+13:32:07.3 |
HIP 20025 |
26.71 |
| 2026-10-02 00:00 |
04:16:15.38 |
+13:30:21.1 |
HIP 20025 |
29.09 |
| 2026-10-02 12:00 |
04:16:08.57 |
+13:28:34.3 |
HIP 19808 |
31.42 |
| 2026-10-03 00:00 |
04:16:01.55 |
+13:26:47.1 |
HIP 19808 |
28.97 |
| 2026-10-03 12:00 |
04:15:54.32 |
+13:24:59.3 |
HIP 19808 |
26.48 |
| 2026-10-04 00:00 |
04:15:46.89 |
+13:23:11.0 |
HIP 19808 |
23.97 |
| 2026-10-04 12:00 |
04:15:39.26 |
+13:21:22.2 |
HIP 19808 |
21.44 |
| 2026-10-05 00:00 |
04:15:31.42 |
+13:19:32.8 |
HIP 19808 |
18.89 |
| 2026-10-05 12:00 |
04:15:23.37 |
+13:17:43.0 |
HIP 19808 |
16.33 |
| 2026-10-06 00:00 |
04:15:15.12 |
+13:15:52.6 |
HIP 19808 |
13.79 |
| 2026-10-06 12:00 |
04:15:06.66 |
+13:14:01.8 |
HIP 19808 |
11.32 |
| 2026-10-07 00:00 |
04:14:58.01 |
+13:12:10.5 |
HIP 19808 |
9.00 |
| 2026-10-07 12:00 |
04:14:49.14 |
+13:10:18.7 |
HIP 19808 |
7.04 |
| 2026-10-08 00:00 |
04:14:40.08 |
+13:08:26.5 |
HIP 19808 |
5.89 |
| 2026-10-08 12:00 |
04:14:30.82 |
+13:06:33.7 |
HIP 19808 |
6.08 |
| 2026-10-09 00:00 |
04:14:21.36 |
+13:04:40.6 |
HIP 19808 |
7.56 |
| 2026-10-09 12:00 |
04:14:11.69 |
+13:02:47.0 |
HIP 19808 |
9.80 |
| 2026-10-10 00:00 |
04:14:01.83 |
+13:00:52.9 |
HIP 19808 |
12.42 |
| 2026-10-10 12:00 |
04:13:51.78 |
+12:58:58.4 |
HIP 19736 |
13.76 |
| 2026-10-11 00:00 |
04:13:41.52 |
+12:57:03.5 |
HIP 19736 |
12.01 |