메타데이터
| 항목 |
값 |
| Designation |
C/2007 Q1 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-12-11T05:36:50.662080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:11Z |
| Obs used |
45 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
16.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2007-09-02.0000000 |
| e |
1.00098762 |
| q (au) |
2.989255 |
| a (au) |
-3026.729908 |
| i (deg) |
82.007598 |
| Ω (om, deg) |
5.894732 |
| ω (w, deg) |
282.133141 |
| M (ma, deg) |
0.001567 |
밝기
산란 + 전체 선형
$$
M_a = (7.386 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.386 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-07-29 00:00 |
21:52:21.47 |
+68:01:09.8 |
HIP 108008 |
5.73 |
| 2026-07-29 12:00 |
21:52:13.86 |
+68:01:24.7 |
HIP 108008 |
5.97 |
| 2026-07-30 00:00 |
21:52:06.23 |
+68:01:39.3 |
HIP 108008 |
6.29 |
| 2026-07-30 12:00 |
21:51:58.57 |
+68:01:53.5 |
HIP 108008 |
6.69 |
| 2026-07-31 00:00 |
21:51:50.89 |
+68:02:07.3 |
HIP 108008 |
7.16 |
| 2026-07-31 12:00 |
21:51:43.18 |
+68:02:20.7 |
HIP 108008 |
7.67 |
| 2026-08-01 00:00 |
21:51:35.45 |
+68:02:33.7 |
HIP 108008 |
8.22 |
| 2026-08-01 12:00 |
21:51:27.70 |
+68:02:46.3 |
HIP 108008 |
8.81 |
| 2026-08-02 00:00 |
21:51:19.93 |
+68:02:58.5 |
HIP 108008 |
9.43 |
| 2026-08-02 12:00 |
21:51:12.14 |
+68:03:10.4 |
HIP 108008 |
10.07 |
| 2026-08-03 00:00 |
21:51:04.32 |
+68:03:21.8 |
HIP 108008 |
10.72 |
| 2026-08-03 12:00 |
21:50:56.49 |
+68:03:32.8 |
HIP 108008 |
11.39 |
| 2026-08-04 00:00 |
21:50:48.64 |
+68:03:43.5 |
HIP 108008 |
12.08 |
| 2026-08-04 12:00 |
21:50:40.76 |
+68:03:53.7 |
HIP 108008 |
12.77 |
| 2026-08-05 00:00 |
21:50:32.87 |
+68:04:03.5 |
HIP 108008 |
13.47 |
| 2026-08-05 12:00 |
21:50:24.97 |
+68:04:13.0 |
HIP 108008 |
14.19 |
| 2026-08-06 00:00 |
21:50:17.04 |
+68:04:22.0 |
HIP 108008 |
14.90 |
| 2026-08-06 12:00 |
21:50:09.10 |
+68:04:30.6 |
HIP 108008 |
15.63 |
| 2026-08-07 00:00 |
21:50:01.15 |
+68:04:38.9 |
HIP 108008 |
16.35 |
| 2026-08-07 12:00 |
21:49:53.17 |
+68:04:46.7 |
HIP 108008 |
17.08 |
| 2026-08-08 00:00 |
21:49:45.19 |
+68:04:54.1 |
HIP 108008 |
17.82 |
| 2026-08-08 12:00 |
21:49:37.19 |
+68:05:01.1 |
HIP 108008 |
18.56 |
| 2026-08-09 00:00 |
21:49:29.18 |
+68:05:07.7 |
HIP 108008 |
19.30 |
| 2026-08-09 12:00 |
21:49:21.15 |
+68:05:13.9 |
HIP 108008 |
20.04 |
| 2026-08-10 00:00 |
21:49:13.12 |
+68:05:19.6 |
HIP 108008 |
20.79 |
| 2026-08-10 12:00 |
21:49:05.07 |
+68:05:25.0 |
HIP 108008 |
21.54 |
| 2026-08-11 00:00 |
21:48:57.01 |
+68:05:30.0 |
HIP 108008 |
22.28 |
| 2026-08-11 12:00 |
21:48:48.95 |
+68:05:34.5 |
HIP 108008 |
23.03 |
| 2026-08-12 00:00 |
21:48:40.87 |
+68:05:38.6 |
HIP 108008 |
23.79 |
| 2026-08-12 12:00 |
21:48:32.79 |
+68:05:42.4 |
HIP 108008 |
24.54 |
| 2026-08-13 00:00 |
21:48:24.70 |
+68:05:45.7 |
HIP 108008 |
25.29 |
| 2026-08-13 12:00 |
21:48:16.60 |
+68:05:48.5 |
HIP 107426 |
26.01 |
| 2026-08-14 00:00 |
21:48:08.49 |
+68:05:51.0 |
HIP 107426 |
25.59 |
| 2026-08-14 12:00 |
21:48:00.39 |
+68:05:53.1 |
HIP 107426 |
25.18 |
| 2026-08-15 00:00 |
21:47:52.27 |
+68:05:54.7 |
HIP 107426 |
24.78 |
| 2026-08-15 12:00 |
21:47:44.15 |
+68:05:56.0 |
HIP 107426 |
24.40 |
| 2026-08-16 00:00 |
21:47:36.03 |
+68:05:56.8 |
HIP 107426 |
24.02 |
| 2026-08-16 12:00 |
21:47:27.91 |
+68:05:57.2 |
HIP 107426 |
23.66 |
| 2026-08-17 00:00 |
21:47:19.79 |
+68:05:57.2 |
HIP 107426 |
23.31 |
| 2026-08-17 12:00 |
21:47:11.66 |
+68:05:56.8 |
HIP 107426 |
22.97 |
| 2026-08-18 00:00 |
21:47:03.54 |
+68:05:55.9 |
HIP 107249 |
22.55 |
| 2026-08-18 12:00 |
21:46:55.41 |
+68:05:54.7 |
HIP 107249 |
21.87 |
| 2026-08-19 00:00 |
21:46:47.29 |
+68:05:53.0 |
HIP 107249 |
21.19 |