메타데이터
| 항목 |
값 |
| Designation |
C/2007 Q3 (Siding Spring) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-10-07T06:29:51.262080Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:19Z |
| Obs used |
1341 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
5.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-08-20.0000000 |
| e |
1.00023766 |
| q (au) |
2.251688 |
| a (au) |
-9474.438449 |
| i (deg) |
65.650492 |
| Ω (om, deg) |
149.412684 |
| ω (w, deg) |
2.092860 |
| M (ma, deg) |
-0.000052 |
밝기
산란 + 전체 선형
$$
M_a = (7.715 + 2.602\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.715 |
| n |
2.602 |
| gf |
0.999 |
| gb |
-0.644 |
| k |
0.990 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2007-08-25 |
2009-03-15 |
+1.0261 |
-1.390 |
| 2009-03-15 |
2009-05-10 |
+22.4756 |
-12.601 |
| 2009-05-10 |
2009-10-03 |
-25.2024 |
+8.557 |
| 2009-10-10 |
2010-02-28 |
+8.7989 |
-3.980 |
| 2010-02-28 |
2010-06-04 |
+2.9606 |
-2.284 |
| 2010-06-04 |
2010-10-30 |
+3.8990 |
-2.293 |
| 2010-10-30 |
2011-09-25 |
+6.2804 |
-3.627 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
20:55:00.52 |
+08:49:04.7 |
HIP 103365 |
24.56 |
| 2026-06-01 12:00 |
20:54:59.06 |
+08:49:16.0 |
HIP 103365 |
24.80 |
| 2026-06-02 00:00 |
20:54:57.58 |
+08:49:27.2 |
HIP 103365 |
25.05 |
| 2026-06-02 12:00 |
20:54:56.07 |
+08:49:38.2 |
HIP 103365 |
25.30 |
| 2026-06-03 00:00 |
20:54:54.53 |
+08:49:49.0 |
HIP 103365 |
25.57 |
| 2026-06-03 12:00 |
20:54:52.97 |
+08:49:59.6 |
HIP 103365 |
25.85 |
| 2026-06-04 00:00 |
20:54:51.39 |
+08:50:10.0 |
HIP 103365 |
26.14 |
| 2026-06-04 12:00 |
20:54:49.78 |
+08:50:20.2 |
HIP 103365 |
26.44 |
| 2026-06-05 00:00 |
20:54:48.15 |
+08:50:30.3 |
HIP 103365 |
26.75 |
| 2026-06-05 12:00 |
20:54:46.49 |
+08:50:40.1 |
HIP 103365 |
27.07 |
| 2026-06-06 00:00 |
20:54:44.81 |
+08:50:49.8 |
HIP 103365 |
27.41 |
| 2026-06-06 12:00 |
20:54:43.11 |
+08:50:59.2 |
HIP 103365 |
27.75 |
| 2026-06-07 00:00 |
20:54:41.38 |
+08:51:08.5 |
HIP 103365 |
28.10 |
| 2026-06-07 12:00 |
20:54:39.63 |
+08:51:17.6 |
HIP 103365 |
28.46 |
| 2026-06-08 00:00 |
20:54:37.85 |
+08:51:26.5 |
HIP 103365 |
28.83 |
| 2026-06-08 12:00 |
20:54:36.05 |
+08:51:35.2 |
HIP 103365 |
29.20 |
| 2026-06-09 00:00 |
20:54:34.23 |
+08:51:43.6 |
HIP 103365 |
29.59 |
| 2026-06-09 12:00 |
20:54:32.39 |
+08:51:51.9 |
HIP 103365 |
29.99 |
| 2026-06-10 00:00 |
20:54:30.52 |
+08:52:00.0 |
HIP 103365 |
30.39 |
| 2026-06-10 12:00 |
20:54:28.63 |
+08:52:07.9 |
HIP 103365 |
30.81 |
| 2026-06-11 00:00 |
20:54:26.71 |
+08:52:15.6 |
HIP 103165 |
30.76 |
| 2026-06-11 12:00 |
20:54:24.77 |
+08:52:23.1 |
HIP 103165 |
30.56 |
| 2026-06-12 00:00 |
20:54:22.82 |
+08:52:30.4 |
HIP 103165 |
30.36 |
| 2026-06-12 12:00 |
20:54:20.83 |
+08:52:37.5 |
HIP 103165 |
30.18 |
| 2026-06-13 00:00 |
20:54:18.83 |
+08:52:44.3 |
HIP 103165 |
30.01 |
| 2026-06-13 12:00 |
20:54:16.80 |
+08:52:51.0 |
HIP 103165 |
29.85 |
| 2026-06-14 00:00 |
20:54:14.75 |
+08:52:57.5 |
HIP 103165 |
29.69 |
| 2026-06-14 12:00 |
20:54:12.68 |
+08:53:03.7 |
HIP 103165 |
29.55 |
| 2026-06-15 00:00 |
20:54:10.59 |
+08:53:09.8 |
HIP 103165 |
29.43 |
| 2026-06-15 12:00 |
20:54:08.48 |
+08:53:15.6 |
HIP 103165 |
29.31 |
| 2026-06-16 00:00 |
20:54:06.34 |
+08:53:21.2 |
HIP 103165 |
29.21 |
| 2026-06-16 12:00 |
20:54:04.19 |
+08:53:26.6 |
HIP 103165 |
29.12 |
| 2026-06-17 00:00 |
20:54:02.01 |
+08:53:31.8 |
HIP 103165 |
29.04 |
| 2026-06-17 12:00 |
20:53:59.81 |
+08:53:36.8 |
HIP 103165 |
28.98 |
| 2026-06-18 00:00 |
20:53:57.59 |
+08:53:41.6 |
HIP 103165 |
28.93 |
| 2026-06-18 12:00 |
20:53:55.35 |
+08:53:46.2 |
HIP 103165 |
28.90 |
| 2026-06-19 00:00 |
20:53:53.10 |
+08:53:50.5 |
HIP 103165 |
28.88 |
| 2026-06-19 12:00 |
20:53:50.82 |
+08:53:54.7 |
HIP 103165 |
28.87 |
| 2026-06-20 00:00 |
20:53:48.52 |
+08:53:58.6 |
HIP 102986 |
28.83 |
| 2026-06-20 12:00 |
20:53:46.20 |
+08:54:02.3 |
HIP 102986 |
28.29 |
| 2026-06-21 00:00 |
20:53:43.86 |
+08:54:05.8 |
HIP 102986 |
27.76 |
| 2026-06-21 12:00 |
20:53:41.51 |
+08:54:09.1 |
HIP 102986 |
27.21 |
| 2026-06-22 00:00 |
20:53:39.13 |
+08:54:12.1 |
HIP 102986 |
26.67 |