메타데이터
| 항목 |
값 |
| Designation |
162P/Siding Spring |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-03-08T10:41:56.990400Z |
| Orbit solution date (soln_date, UTC) |
2026-10-01T14:42:13Z |
| Obs used |
3282 |
| NEO |
Yes |
| M1 |
15.200 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-02-23.0000000 |
| e |
0.59607087 |
| q (au) |
1.233434 |
| a (au) |
3.053590 |
| i (deg) |
27.817331 |
| Ω (om, deg) |
31.235487 |
| ω (w, deg) |
356.337470 |
| M (ma, deg) |
64.935207 |
밝기
산란 + 전체 선형
$$
M_a = (14.800 + 2.201\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.800 |
| n |
2.201 |
| gf |
0.927 |
| gb |
-0.819 |
| k |
0.984 |
| δ90 |
1.000 |
| 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) |
| 2026-09-25 00:00 |
09:40:46.50 |
+36:31:41.9 |
HIP 47716 |
35.64 |
| 2026-09-25 12:00 |
09:42:02.09 |
+36:29:34.3 |
HIP 47716 |
20.33 |
| 2026-09-26 00:00 |
09:43:17.35 |
+36:27:26.4 |
HIP 47716 |
5.28 |
| 2026-09-26 12:00 |
09:44:32.29 |
+36:25:18.2 |
HIP 47845 |
7.34 |
| 2026-09-27 00:00 |
09:45:46.91 |
+36:23:09.7 |
HIP 47845 |
8.28 |
| 2026-09-27 12:00 |
09:47:01.20 |
+36:21:01.0 |
HIP 47845 |
23.25 |
| 2026-09-28 00:00 |
09:48:15.17 |
+36:18:52.2 |
HIP 48173 |
16.87 |
| 2026-09-28 12:00 |
09:49:28.82 |
+36:16:43.1 |
HIP 48173 |
15.60 |
| 2026-09-29 00:00 |
09:50:42.15 |
+36:14:33.9 |
HIP 48337 |
15.77 |
| 2026-09-29 12:00 |
09:51:55.15 |
+36:12:24.7 |
HIP 48421 |
7.06 |
| 2026-09-30 00:00 |
09:53:07.84 |
+36:10:15.3 |
HIP 48546 |
12.33 |
| 2026-09-30 12:00 |
09:54:20.20 |
+36:08:06.0 |
HIP 48546 |
7.22 |
| 2026-10-01 00:00 |
09:55:32.24 |
+36:05:56.7 |
HIP 48546 |
19.64 |
| 2026-10-01 12:00 |
09:56:43.97 |
+36:03:47.4 |
HIP 48546 |
33.88 |
| 2026-10-02 00:00 |
09:57:55.37 |
+36:01:38.3 |
HIP 49056 |
35.10 |
| 2026-10-02 12:00 |
09:59:06.46 |
+35:59:29.2 |
HIP 49056 |
21.19 |
| 2026-10-03 00:00 |
10:00:17.22 |
+35:57:20.3 |
HIP 49056 |
9.50 |
| 2026-10-03 12:00 |
10:01:27.67 |
+35:55:11.6 |
HIP 49056 |
12.25 |
| 2026-10-04 00:00 |
10:02:37.79 |
+35:53:03.2 |
HIP 49283 |
12.31 |
| 2026-10-04 12:00 |
10:03:47.60 |
+35:50:55.0 |
HIP 49283 |
6.84 |
| 2026-10-05 00:00 |
10:04:57.09 |
+35:48:47.1 |
HIP 49283 |
18.67 |
| 2026-10-05 12:00 |
10:06:06.26 |
+35:46:39.6 |
HIP 49640 |
25.13 |
| 2026-10-06 00:00 |
10:07:15.11 |
+35:44:32.4 |
HIP 49640 |
12.78 |
| 2026-10-06 12:00 |
10:08:23.65 |
+35:42:25.6 |
HIP 49640 |
9.73 |
| 2026-10-07 00:00 |
10:09:31.86 |
+35:40:19.3 |
HIP 49687 |
19.12 |
| 2026-10-07 12:00 |
10:10:39.76 |
+35:38:13.4 |
HIP 49687 |
30.75 |
| 2026-10-08 00:00 |
10:11:47.33 |
+35:36:08.1 |
HIP 50050 |
19.78 |
| 2026-10-08 12:00 |
10:12:54.59 |
+35:34:03.3 |
HIP 50050 |
9.39 |
| 2026-10-09 00:00 |
10:14:01.53 |
+35:31:59.1 |
HIP 50050 |
12.94 |
| 2026-10-09 12:00 |
10:15:08.15 |
+35:29:55.5 |
HIP 50293 |
23.62 |
| 2026-10-10 00:00 |
10:16:14.46 |
+35:27:52.5 |
HIP 50293 |
18.03 |
| 2026-10-10 12:00 |
10:17:20.44 |
+35:25:50.2 |
HIP 50464 |
21.14 |
| 2026-10-11 00:00 |
10:18:26.11 |
+35:23:48.5 |
HIP 50464 |
20.52 |
| 2026-10-11 12:00 |
10:19:31.46 |
+35:21:47.6 |
HIP 50464 |
27.53 |
| 2026-10-12 00:00 |
10:20:36.49 |
+35:19:47.5 |
HIP 50665 |
23.18 |
| 2026-10-12 12:00 |
10:21:41.20 |
+35:17:48.2 |
HIP 50857 |
17.82 |
| 2026-10-13 00:00 |
10:22:45.59 |
+35:15:49.6 |
HIP 50857 |
4.89 |
| 2026-10-13 12:00 |
10:23:49.67 |
+35:13:52.0 |
HIP 50857 |
9.09 |
| 2026-10-14 00:00 |
10:24:53.43 |
+35:11:55.2 |
HIP 50968 |
11.92 |
| 2026-10-14 12:00 |
10:25:56.87 |
+35:09:59.3 |
HIP 51047 |
15.73 |
| 2026-10-15 00:00 |
10:27:00.00 |
+35:08:04.3 |
HIP 51047 |
23.22 |
| 2026-10-15 12:00 |
10:28:02.80 |
+35:06:10.3 |
HIP 51312 |
16.40 |
| 2026-10-16 00:00 |
10:29:05.29 |
+35:04:17.2 |
HIP 51312 |
11.49 |