C/2008 J5 (Garradd)
메타데이터
| 항목 |
값 |
| Designation |
C/2008 J5 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-04-01T01:47:02.302080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:19Z |
| Obs used |
128 |
| NEO |
- |
| M1 |
10.600 |
| K1 |
17.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-06-25.0000000 |
| e |
0.97288948 |
| q (au) |
1.963842 |
| a (au) |
72.438378 |
| i (deg) |
93.270724 |
| Ω (om, deg) |
287.075696 |
| ω (w, deg) |
313.376402 |
| M (ma, deg) |
0.135766 |
밝기
산란 + 전체 선형
$$
M_a = (10.954 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.954 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.798 |
| k |
0.998 |
| 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) |
| 2026-02-03 00:00 |
14:52:27.16 |
+79:46:03.8 |
HIP 72908 |
14.87 |
| 2026-02-03 12:00 |
14:52:26.73 |
+79:46:57.8 |
HIP 72908 |
15.74 |
| 2026-02-04 00:00 |
14:52:26.14 |
+79:47:51.7 |
HIP 72908 |
16.61 |
| 2026-02-04 12:00 |
14:52:25.37 |
+79:48:45.6 |
HIP 72908 |
17.48 |
| 2026-02-05 00:00 |
14:52:24.44 |
+79:49:39.5 |
HIP 72908 |
18.36 |
| 2026-02-05 12:00 |
14:52:23.34 |
+79:50:33.4 |
HIP 72908 |
19.25 |
| 2026-02-06 00:00 |
14:52:22.07 |
+79:51:27.2 |
HIP 72908 |
20.13 |
| 2026-02-06 12:00 |
14:52:20.64 |
+79:52:21.1 |
HIP 72908 |
21.02 |
| 2026-02-07 00:00 |
14:52:19.02 |
+79:53:14.8 |
HIP 72908 |
21.91 |
| 2026-02-07 12:00 |
14:52:17.24 |
+79:54:08.6 |
HIP 72908 |
22.80 |
| 2026-02-08 00:00 |
14:52:15.29 |
+79:55:02.3 |
HIP 72908 |
23.69 |
| 2026-02-08 12:00 |
14:52:13.16 |
+79:55:55.9 |
HIP 72908 |
24.59 |
| 2026-02-09 00:00 |
14:52:10.86 |
+79:56:49.5 |
HIP 72908 |
25.48 |
| 2026-02-09 12:00 |
14:52:08.39 |
+79:57:43.0 |
HIP 72908 |
26.38 |
| 2026-02-10 00:00 |
14:52:05.74 |
+79:58:36.5 |
HIP 72908 |
27.27 |
| 2026-02-10 12:00 |
14:52:02.91 |
+79:59:29.9 |
HIP 72908 |
28.17 |
| 2026-02-11 00:00 |
14:51:59.91 |
+80:00:23.3 |
HIP 72908 |
29.07 |
| 2026-02-11 12:00 |
14:51:56.74 |
+80:01:16.5 |
HIP 72908 |
29.96 |
| 2026-02-12 00:00 |
14:51:53.38 |
+80:02:09.7 |
HIP 72908 |
30.86 |
| 2026-02-12 12:00 |
14:51:49.85 |
+80:03:02.8 |
HIP 72908 |
31.76 |
| 2026-02-13 00:00 |
14:51:46.14 |
+80:03:55.8 |
HIP 72908 |
32.66 |
| 2026-02-13 12:00 |
14:51:42.25 |
+80:04:48.7 |
HIP 72908 |
33.55 |
| 2026-02-14 00:00 |
14:51:38.18 |
+80:05:41.5 |
HIP 72908 |
34.45 |
| 2026-02-14 12:00 |
14:51:33.93 |
+80:06:34.3 |
HIP 72908 |
35.35 |
| 2026-02-15 00:00 |
14:51:29.50 |
+80:07:26.9 |
HIP 72908 |
36.25 |
| 2026-02-15 12:00 |
14:51:24.89 |
+80:08:19.4 |
HIP 72581 |
36.74 |
| 2026-02-16 00:00 |
14:51:20.10 |
+80:09:11.7 |
HIP 72581 |
35.85 |
| 2026-02-16 12:00 |
14:51:15.13 |
+80:10:04.0 |
HIP 72581 |
34.97 |
| 2026-02-17 00:00 |
14:51:09.97 |
+80:10:56.1 |
HIP 72581 |
34.09 |
| 2026-02-17 12:00 |
14:51:04.63 |
+80:11:48.1 |
HIP 72581 |
33.22 |
| 2026-02-18 00:00 |
14:50:59.11 |
+80:12:40.0 |
HIP 72581 |
32.34 |
| 2026-02-18 12:00 |
14:50:53.41 |
+80:13:31.7 |
HIP 72581 |
31.48 |
| 2026-02-19 00:00 |
14:50:47.53 |
+80:14:23.3 |
HIP 72581 |
30.61 |
| 2026-02-19 12:00 |
14:50:41.46 |
+80:15:14.8 |
HIP 72581 |
29.75 |
| 2026-02-20 00:00 |
14:50:35.20 |
+80:16:06.0 |
HIP 72581 |
28.89 |
| 2026-02-20 12:00 |
14:50:28.77 |
+80:16:57.2 |
HIP 72581 |
28.04 |
| 2026-02-21 00:00 |
14:50:22.15 |
+80:17:48.1 |
HIP 72581 |
27.19 |
| 2026-02-21 12:00 |
14:50:15.34 |
+80:18:38.9 |
HIP 72581 |
26.35 |
| 2026-02-22 00:00 |
14:50:08.36 |
+80:19:29.5 |
HIP 72581 |
25.51 |
| 2026-02-22 12:00 |
14:50:01.18 |
+80:20:20.0 |
HIP 72581 |
24.68 |
| 2026-02-23 00:00 |
14:49:53.83 |
+80:21:10.3 |
HIP 72581 |
23.86 |
| 2026-02-23 12:00 |
14:49:46.29 |
+80:22:00.3 |
HIP 72581 |
23.05 |
| 2026-02-24 00:00 |
14:49:38.57 |
+80:22:50.2 |
HIP 72581 |
22.25 |