C/2008 Q3 (Garradd)
메타데이터
| 항목 |
값 |
| Designation |
C/2008 Q3 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-06-23T02:14:05.628480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:22Z |
| Obs used |
701 |
| NEO |
- |
| M1 |
6.300 |
| K1 |
16.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-08-27.0000000 |
| e |
0.99979780 |
| q (au) |
1.798229 |
| a (au) |
8893.448410 |
| i (deg) |
140.706611 |
| Ω (om, deg) |
219.734004 |
| ω (w, deg) |
340.855249 |
| M (ma, deg) |
0.000076 |
밝기
산란 + 전체 선형
$$
M_a = (6.294 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.294 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2008-08-27 |
2009-06-22 |
+8.4849 |
-4.218 |
| 2009-06-23 |
2009-12-15 |
+8.1974 |
-4.343 |
| 2009-12-15 |
2010-06-03 |
-2.6972 |
+1.170 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
04:43:48.98 |
+49:43:39.2 |
HIP 21972 |
15.42 |
| 2026-02-03 12:00 |
04:43:46.20 |
+49:43:13.4 |
HIP 21972 |
15.72 |
| 2026-02-04 00:00 |
04:43:43.46 |
+49:42:47.5 |
HIP 21972 |
16.03 |
| 2026-02-04 12:00 |
04:43:40.77 |
+49:42:21.5 |
HIP 21972 |
16.37 |
| 2026-02-05 00:00 |
04:43:38.12 |
+49:41:55.5 |
HIP 21972 |
16.72 |
| 2026-02-05 12:00 |
04:43:35.52 |
+49:41:29.5 |
HIP 21972 |
17.09 |
| 2026-02-06 00:00 |
04:43:32.96 |
+49:41:03.5 |
HIP 21972 |
17.47 |
| 2026-02-06 12:00 |
04:43:30.44 |
+49:40:37.4 |
HIP 21972 |
17.86 |
| 2026-02-07 00:00 |
04:43:27.97 |
+49:40:11.3 |
HIP 21972 |
18.27 |
| 2026-02-07 12:00 |
04:43:25.54 |
+49:39:45.1 |
HIP 21972 |
18.69 |
| 2026-02-08 00:00 |
04:43:23.15 |
+49:39:18.9 |
HIP 21972 |
19.12 |
| 2026-02-08 12:00 |
04:43:20.81 |
+49:38:52.7 |
HIP 21972 |
19.55 |
| 2026-02-09 00:00 |
04:43:18.52 |
+49:38:26.5 |
HIP 21972 |
19.99 |
| 2026-02-09 12:00 |
04:43:16.27 |
+49:38:00.2 |
HIP 21876 |
20.20 |
| 2026-02-10 00:00 |
04:43:14.06 |
+49:37:34.0 |
HIP 21876 |
20.40 |
| 2026-02-10 12:00 |
04:43:11.90 |
+49:37:07.7 |
HIP 21876 |
20.61 |
| 2026-02-11 00:00 |
04:43:09.78 |
+49:36:41.4 |
HIP 21876 |
20.83 |
| 2026-02-11 12:00 |
04:43:07.71 |
+49:36:15.1 |
HIP 21876 |
21.07 |
| 2026-02-12 00:00 |
04:43:05.68 |
+49:35:48.7 |
HIP 21876 |
21.33 |
| 2026-02-12 12:00 |
04:43:03.70 |
+49:35:22.4 |
HIP 21876 |
21.60 |
| 2026-02-13 00:00 |
04:43:01.77 |
+49:34:56.1 |
HIP 21876 |
21.89 |
| 2026-02-13 12:00 |
04:42:59.88 |
+49:34:29.7 |
HIP 21876 |
22.18 |
| 2026-02-14 00:00 |
04:42:58.04 |
+49:34:03.4 |
HIP 21876 |
22.49 |
| 2026-02-14 12:00 |
04:42:56.24 |
+49:33:37.0 |
HIP 21876 |
22.81 |
| 2026-02-15 00:00 |
04:42:54.48 |
+49:33:10.7 |
HIP 21876 |
23.13 |
| 2026-02-15 12:00 |
04:42:52.78 |
+49:32:44.4 |
HIP 21876 |
23.47 |
| 2026-02-16 00:00 |
04:42:51.12 |
+49:32:18.0 |
HIP 21876 |
23.82 |
| 2026-02-16 12:00 |
04:42:49.50 |
+49:31:51.7 |
HIP 21876 |
24.17 |
| 2026-02-17 00:00 |
04:42:47.93 |
+49:31:25.4 |
HIP 21876 |
24.53 |
| 2026-02-17 12:00 |
04:42:46.41 |
+49:30:59.1 |
HIP 21876 |
24.89 |
| 2026-02-18 00:00 |
04:42:44.94 |
+49:30:32.8 |
HIP 21876 |
25.27 |
| 2026-02-18 12:00 |
04:42:43.51 |
+49:30:06.6 |
HIP 21876 |
25.65 |
| 2026-02-19 00:00 |
04:42:42.12 |
+49:29:40.3 |
HIP 21876 |
26.03 |
| 2026-02-19 12:00 |
04:42:40.78 |
+49:29:14.1 |
HIP 21876 |
26.42 |
| 2026-02-20 00:00 |
04:42:39.49 |
+49:28:47.9 |
HIP 21876 |
26.81 |
| 2026-02-20 12:00 |
04:42:38.25 |
+49:28:21.7 |
HIP 21876 |
27.20 |
| 2026-02-21 00:00 |
04:42:37.05 |
+49:27:55.6 |
HIP 21876 |
27.60 |
| 2026-02-21 12:00 |
04:42:35.90 |
+49:27:29.5 |
HIP 21876 |
28.01 |
| 2026-02-22 00:00 |
04:42:34.79 |
+49:27:03.4 |
HIP 21876 |
28.41 |
| 2026-02-22 12:00 |
04:42:33.73 |
+49:26:37.3 |
HIP 21876 |
28.82 |
| 2026-02-23 00:00 |
04:42:32.72 |
+49:26:11.3 |
HIP 21876 |
29.23 |
| 2026-02-23 12:00 |
04:42:31.75 |
+49:25:45.3 |
HIP 21876 |
29.64 |
| 2026-02-24 00:00 |
04:42:30.83 |
+49:25:19.4 |
HIP 22104 |
30.02 |