메타데이터
| 항목 |
값 |
| Designation |
259P/Garradd |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-01-25T10:16:11.795520Z |
| Orbit solution date (soln_date, UTC) |
2026-08-07T12:42:24Z |
| Obs used |
77 |
| NEO |
- |
| M1 |
14.200 |
| K1 |
20.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-05-23.0000000 |
| e |
0.34111926 |
| q (au) |
1.797613 |
| a (au) |
2.728283 |
| i (deg) |
15.899135 |
| Ω (om, deg) |
51.961718 |
| ω (w, deg) |
256.560091 |
| M (ma, deg) |
305.884869 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
20:29:45.23 |
-46:03:08.6 |
HIP 101168 |
25.02 |
| 2026-09-20 12:00 |
20:30:15.92 |
-45:55:27.6 |
HIP 101194 |
20.81 |
| 2026-09-21 00:00 |
20:30:47.07 |
-45:47:44.3 |
HIP 101194 |
12.54 |
| 2026-09-21 12:00 |
20:31:18.67 |
-45:39:58.7 |
HIP 101194 |
7.76 |
| 2026-09-22 00:00 |
20:31:50.72 |
-45:32:10.9 |
HIP 101319 |
11.34 |
| 2026-09-22 12:00 |
20:32:23.21 |
-45:24:21.0 |
HIP 101319 |
3.88 |
| 2026-09-23 00:00 |
20:32:56.13 |
-45:16:28.8 |
HIP 101319 |
9.54 |
| 2026-09-23 12:00 |
20:33:29.49 |
-45:08:34.6 |
HIP 101547 |
13.73 |
| 2026-09-24 00:00 |
20:34:03.26 |
-45:00:38.3 |
HIP 101547 |
8.74 |
| 2026-09-24 12:00 |
20:34:37.44 |
-44:52:40.0 |
HIP 101547 |
12.71 |
| 2026-09-25 00:00 |
20:35:12.03 |
-44:44:39.7 |
HIP 101477 |
19.37 |
| 2026-09-25 12:00 |
20:35:47.02 |
-44:36:37.5 |
HIP 101623 |
16.37 |
| 2026-09-26 00:00 |
20:36:22.41 |
-44:28:33.3 |
HIP 101623 |
10.34 |
| 2026-09-26 12:00 |
20:36:58.18 |
-44:20:27.3 |
HIP 101623 |
12.58 |
| 2026-09-27 00:00 |
20:37:34.33 |
-44:12:19.4 |
HIP 101924 |
19.04 |
| 2026-09-27 12:00 |
20:38:10.86 |
-44:04:09.7 |
HIP 101924 |
12.48 |
| 2026-09-28 00:00 |
20:38:47.75 |
-43:55:58.2 |
HIP 101880 |
12.18 |
| 2026-09-28 12:00 |
20:39:25.01 |
-43:47:44.9 |
HIP 101880 |
8.61 |
| 2026-09-29 00:00 |
20:40:02.62 |
-43:39:29.9 |
HIP 101977 |
3.26 |
| 2026-09-29 12:00 |
20:40:40.58 |
-43:31:13.3 |
HIP 101977 |
9.38 |
| 2026-09-30 00:00 |
20:41:18.89 |
-43:22:54.9 |
HIP 101977 |
20.01 |
| 2026-09-30 12:00 |
20:41:57.54 |
-43:14:34.9 |
HIP 102260 |
14.49 |
| 2026-10-01 00:00 |
20:42:36.52 |
-43:06:13.3 |
HIP 102260 |
14.15 |
| 2026-10-01 12:00 |
20:43:15.82 |
-42:57:50.2 |
HIP 102260 |
20.78 |
| 2026-10-02 00:00 |
20:43:55.45 |
-42:49:25.4 |
HIP 102446 |
19.32 |
| 2026-10-02 12:00 |
20:44:35.40 |
-42:40:59.1 |
HIP 102446 |
19.12 |
| 2026-10-03 00:00 |
20:45:15.67 |
-42:32:31.3 |
HIP 102446 |
24.65 |
| 2026-10-03 12:00 |
20:45:56.24 |
-42:24:02.0 |
HIP 102307 |
32.27 |
| 2026-10-04 00:00 |
20:46:37.11 |
-42:15:31.2 |
HIP 102783 |
31.16 |
| 2026-10-04 12:00 |
20:47:18.29 |
-42:06:59.0 |
HIP 102783 |
23.69 |
| 2026-10-05 00:00 |
20:47:59.76 |
-41:58:25.4 |
HIP 102783 |
20.26 |
| 2026-10-05 12:00 |
20:48:41.51 |
-41:49:50.3 |
HIP 102792 |
11.39 |
| 2026-10-06 00:00 |
20:49:23.56 |
-41:41:13.9 |
HIP 102792 |
1.79 |
| 2026-10-06 12:00 |
20:50:05.89 |
-41:32:36.1 |
HIP 102792 |
12.21 |
| 2026-10-07 00:00 |
20:50:48.49 |
-41:23:57.0 |
HIP 102792 |
23.92 |
| 2026-10-07 12:00 |
20:51:31.36 |
-41:15:16.6 |
HIP 103119 |
25.62 |
| 2026-10-08 00:00 |
20:52:14.51 |
-41:06:34.9 |
HIP 103119 |
15.28 |
| 2026-10-08 12:00 |
20:52:57.91 |
-40:57:52.0 |
HIP 103119 |
9.62 |
| 2026-10-09 00:00 |
20:53:41.58 |
-40:49:07.8 |
HIP 103142 |
2.92 |
| 2026-10-09 12:00 |
20:54:25.50 |
-40:40:22.4 |
HIP 103142 |
9.16 |
| 2026-10-10 00:00 |
20:55:09.67 |
-40:31:35.8 |
HIP 103267 |
2.86 |
| 2026-10-10 12:00 |
20:55:54.09 |
-40:22:48.0 |
HIP 103286 |
10.70 |
| 2026-10-11 00:00 |
20:56:38.75 |
-40:13:59.1 |
HIP 103286 |
13.11 |