메타데이터
| 항목 |
값 |
| Designation |
247P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-01-04T04:00:10.526400Z |
| Orbit solution date (soln_date, UTC) |
2026-09-21T07:12:14Z |
| Obs used |
1348 |
| NEO |
- |
| M1 |
17.900 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-09-23.0000000 |
| e |
0.62562779 |
| q (au) |
1.484385 |
| a (au) |
3.964998 |
| i (deg) |
13.682383 |
| Ω (om, deg) |
54.122370 |
| ω (w, deg) |
47.339845 |
| M (ma, deg) |
32.686191 |
밝기
산란 + 전체 선형
$$
M_a = (16.617 + 4.981\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.617 |
| n |
4.981 |
| gf |
0.998 |
| gb |
-0.519 |
| k |
0.800 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
07:41:27.77 |
+26:19:14.2 |
HIP 37452 |
26.01 |
| 2026-09-20 12:00 |
07:43:13.75 |
+26:19:25.8 |
HIP 37642 |
16.65 |
| 2026-09-21 00:00 |
07:44:59.80 |
+26:19:33.9 |
HIP 37848 |
21.50 |
| 2026-09-21 12:00 |
07:46:45.92 |
+26:19:38.3 |
HIP 37971 |
18.37 |
| 2026-09-22 00:00 |
07:48:32.09 |
+26:19:39.2 |
HIP 38221 |
17.38 |
| 2026-09-22 12:00 |
07:50:18.32 |
+26:19:36.5 |
HIP 38221 |
7.83 |
| 2026-09-23 00:00 |
07:52:04.60 |
+26:19:30.2 |
HIP 38342 |
11.62 |
| 2026-09-23 12:00 |
07:53:50.93 |
+26:19:20.3 |
HIP 38620 |
12.54 |
| 2026-09-24 00:00 |
07:55:37.31 |
+26:19:06.9 |
HIP 38620 |
17.93 |
| 2026-09-24 12:00 |
07:57:23.73 |
+26:18:49.9 |
HIP 38832 |
14.87 |
| 2026-09-25 00:00 |
07:59:10.18 |
+26:18:29.3 |
HIP 38985 |
18.42 |
| 2026-09-25 12:00 |
08:00:56.66 |
+26:18:05.1 |
HIP 39306 |
26.17 |
| 2026-09-26 00:00 |
08:02:43.18 |
+26:17:37.4 |
HIP 39401 |
8.07 |
| 2026-09-26 12:00 |
08:04:29.71 |
+26:17:06.1 |
HIP 39401 |
16.00 |
| 2026-09-27 00:00 |
08:06:16.27 |
+26:16:31.3 |
HIP 39603 |
13.47 |
| 2026-09-27 12:00 |
08:08:02.85 |
+26:15:52.9 |
HIP 39603 |
34.56 |
| 2026-09-28 00:00 |
08:09:49.43 |
+26:15:10.9 |
HIP 40007 |
25.08 |
| 2026-09-28 12:00 |
08:11:36.03 |
+26:14:25.4 |
HIP 40200 |
14.27 |
| 2026-09-29 00:00 |
08:13:22.63 |
+26:13:36.4 |
HIP 40200 |
9.67 |
| 2026-09-29 12:00 |
08:15:09.22 |
+26:12:43.9 |
HIP 40378 |
31.79 |
| 2026-09-30 00:00 |
08:16:55.82 |
+26:11:47.8 |
HIP 40667 |
20.95 |
| 2026-09-30 12:00 |
08:18:42.40 |
+26:10:48.2 |
HIP 40739 |
9.72 |
| 2026-10-01 00:00 |
08:20:28.96 |
+26:09:45.2 |
HIP 40739 |
23.54 |
| 2026-10-01 12:00 |
08:22:15.51 |
+26:08:38.7 |
HIP 41014 |
13.24 |
| 2026-10-02 00:00 |
08:24:02.04 |
+26:07:28.7 |
HIP 41194 |
20.94 |
| 2026-10-02 12:00 |
08:25:48.53 |
+26:06:15.3 |
HIP 41194 |
29.12 |
| 2026-10-03 00:00 |
08:27:34.99 |
+26:04:58.5 |
HIP 41447 |
21.92 |
| 2026-10-03 12:00 |
08:29:21.42 |
+26:03:38.2 |
HIP 41679 |
10.14 |
| 2026-10-04 00:00 |
08:31:07.80 |
+26:02:14.6 |
HIP 41760 |
2.79 |
| 2026-10-04 12:00 |
08:32:54.13 |
+26:00:47.6 |
HIP 41950 |
16.48 |
| 2026-10-05 00:00 |
08:34:40.41 |
+25:59:17.2 |
HIP 42243 |
27.67 |
| 2026-10-05 12:00 |
08:36:26.63 |
+25:57:43.5 |
HIP 42243 |
3.92 |
| 2026-10-06 00:00 |
08:38:12.79 |
+25:56:06.5 |
HIP 42356 |
6.92 |
| 2026-10-06 12:00 |
08:39:58.89 |
+25:54:26.2 |
HIP 42356 |
26.21 |
| 2026-10-07 00:00 |
08:41:44.91 |
+25:52:42.7 |
HIP 42746 |
16.78 |
| 2026-10-07 12:00 |
08:43:30.85 |
+25:50:55.9 |
HIP 42746 |
16.47 |
| 2026-10-08 00:00 |
08:45:16.71 |
+25:49:05.9 |
HIP 42891 |
16.81 |
| 2026-10-08 12:00 |
08:47:02.49 |
+25:47:12.7 |
HIP 43111 |
19.04 |
| 2026-10-09 00:00 |
08:48:48.17 |
+25:45:16.3 |
HIP 43111 |
31.72 |
| 2026-10-09 12:00 |
08:50:33.75 |
+25:43:16.7 |
HIP 43532 |
18.94 |
| 2026-10-10 00:00 |
08:52:19.24 |
+25:41:14.1 |
HIP 43535 |
4.63 |
| 2026-10-10 12:00 |
08:54:04.62 |
+25:39:08.3 |
HIP 43535 |
28.26 |
| 2026-10-11 00:00 |
08:55:49.89 |
+25:36:59.5 |
HIP 43889 |
15.48 |