메타데이터
| 항목 |
값 |
| Designation |
C/2008 E3 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-08-02T05:22:47.424000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:17Z |
| Obs used |
109 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-08-09.0000000 |
| e |
0.99849003 |
| q (au) |
5.531015 |
| a (au) |
3662.996730 |
| i (deg) |
105.076501 |
| Ω (om, deg) |
105.674911 |
| ω (w, deg) |
218.094534 |
| M (ma, deg) |
0.000030 |
밝기
산란 + 전체 선형
$$
M_a = (2.326 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.326 |
| 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) |
| 2026-05-12 00:00 |
07:08:08.22 |
+13:19:37.2 |
HIP 34328 |
17.78 |
| 2026-05-12 12:00 |
07:08:10.19 |
+13:19:45.6 |
HIP 34328 |
18.20 |
| 2026-05-13 00:00 |
07:08:12.18 |
+13:19:53.9 |
HIP 34328 |
18.64 |
| 2026-05-13 12:00 |
07:08:14.19 |
+13:20:02.2 |
HIP 34328 |
19.09 |
| 2026-05-14 00:00 |
07:08:16.23 |
+13:20:10.3 |
HIP 34328 |
19.54 |
| 2026-05-14 12:00 |
07:08:18.28 |
+13:20:18.4 |
HIP 34328 |
20.01 |
| 2026-05-15 00:00 |
07:08:20.36 |
+13:20:26.4 |
HIP 34328 |
20.48 |
| 2026-05-15 12:00 |
07:08:22.47 |
+13:20:34.3 |
HIP 34328 |
20.96 |
| 2026-05-16 00:00 |
07:08:24.59 |
+13:20:42.1 |
HIP 34328 |
21.45 |
| 2026-05-16 12:00 |
07:08:26.74 |
+13:20:49.8 |
HIP 34328 |
21.94 |
| 2026-05-17 00:00 |
07:08:28.91 |
+13:20:57.5 |
HIP 34328 |
22.45 |
| 2026-05-17 12:00 |
07:08:31.10 |
+13:21:05.0 |
HIP 34328 |
22.96 |
| 2026-05-18 00:00 |
07:08:33.32 |
+13:21:12.5 |
HIP 34557 |
22.93 |
| 2026-05-18 12:00 |
07:08:35.55 |
+13:21:19.8 |
HIP 34557 |
22.50 |
| 2026-05-19 00:00 |
07:08:37.81 |
+13:21:27.1 |
HIP 34557 |
22.08 |
| 2026-05-19 12:00 |
07:08:40.09 |
+13:21:34.3 |
HIP 34557 |
21.65 |
| 2026-05-20 00:00 |
07:08:42.38 |
+13:21:41.4 |
HIP 34557 |
21.24 |
| 2026-05-20 12:00 |
07:08:44.70 |
+13:21:48.4 |
HIP 34557 |
20.83 |
| 2026-05-21 00:00 |
07:08:47.04 |
+13:21:55.3 |
HIP 34557 |
20.42 |
| 2026-05-21 12:00 |
07:08:49.40 |
+13:22:02.1 |
HIP 34557 |
20.03 |
| 2026-05-22 00:00 |
07:08:51.78 |
+13:22:08.9 |
HIP 34557 |
19.64 |
| 2026-05-22 12:00 |
07:08:54.18 |
+13:22:15.5 |
HIP 34557 |
19.26 |
| 2026-05-23 00:00 |
07:08:56.60 |
+13:22:22.1 |
HIP 34557 |
18.89 |
| 2026-05-23 12:00 |
07:08:59.04 |
+13:22:28.6 |
HIP 34557 |
18.53 |
| 2026-05-24 00:00 |
07:09:01.50 |
+13:22:34.9 |
HIP 34557 |
18.19 |
| 2026-05-24 12:00 |
07:09:03.98 |
+13:22:41.2 |
HIP 34557 |
17.85 |
| 2026-05-25 00:00 |
07:09:06.47 |
+13:22:47.4 |
HIP 34557 |
17.54 |
| 2026-05-25 12:00 |
07:09:08.99 |
+13:22:53.6 |
HIP 34557 |
17.24 |
| 2026-05-26 00:00 |
07:09:11.52 |
+13:22:59.6 |
HIP 34557 |
16.95 |
| 2026-05-26 12:00 |
07:09:14.07 |
+13:23:05.5 |
HIP 34557 |
16.69 |
| 2026-05-27 00:00 |
07:09:16.64 |
+13:23:11.4 |
HIP 34557 |
16.44 |
| 2026-05-27 12:00 |
07:09:19.23 |
+13:23:17.1 |
HIP 34557 |
16.22 |
| 2026-05-28 00:00 |
07:09:21.83 |
+13:23:22.8 |
HIP 34557 |
16.02 |
| 2026-05-28 12:00 |
07:09:24.45 |
+13:23:28.4 |
HIP 34557 |
15.85 |
| 2026-05-29 00:00 |
07:09:27.09 |
+13:23:33.9 |
HIP 34557 |
15.70 |
| 2026-05-29 12:00 |
07:09:29.75 |
+13:23:39.3 |
HIP 34557 |
15.57 |
| 2026-05-30 00:00 |
07:09:32.43 |
+13:23:44.6 |
HIP 34557 |
15.48 |
| 2026-05-30 12:00 |
07:09:35.12 |
+13:23:49.8 |
HIP 34557 |
15.41 |
| 2026-05-31 00:00 |
07:09:37.82 |
+13:23:55.0 |
HIP 34557 |
15.38 |
| 2026-05-31 12:00 |
07:09:40.55 |
+13:24:00.0 |
HIP 34557 |
15.37 |
| 2026-06-01 00:00 |
07:09:43.29 |
+13:24:05.0 |
HIP 34557 |
15.40 |
| 2026-06-01 12:00 |
07:09:46.05 |
+13:24:09.9 |
HIP 34591 |
15.43 |
| 2026-06-02 00:00 |
07:09:48.82 |
+13:24:14.7 |
HIP 34591 |
15.44 |