메타데이터
| 항목 |
값 |
| Designation |
259P/Garradd |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-01-25T05:54:24.387840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:08Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
22.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2011-02-26.0000000 |
| e |
0.34152970 |
| q (au) |
1.795939 |
| a (au) |
2.727441 |
| i (deg) |
15.898537 |
| Ω (om, deg) |
51.969696 |
| ω (w, deg) |
256.590906 |
| M (ma, deg) |
206.996592 |
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) |
| 2026-05-12 00:00 |
19:59:40.18 |
-35:04:25.4 |
HIP 98412 |
12.18 |
| 2026-05-12 12:00 |
20:00:26.54 |
-35:09:58.5 |
HIP 98412 |
10.88 |
| 2026-05-13 00:00 |
20:01:12.64 |
-35:15:34.0 |
HIP 98664 |
14.59 |
| 2026-05-13 12:00 |
20:01:58.48 |
-35:21:12.1 |
HIP 98664 |
7.03 |
| 2026-05-14 00:00 |
20:02:44.05 |
-35:26:52.6 |
HIP 98722 |
8.72 |
| 2026-05-14 12:00 |
20:03:29.35 |
-35:32:35.7 |
HIP 98722 |
14.24 |
| 2026-05-15 00:00 |
20:04:14.38 |
-35:38:21.3 |
HIP 98870 |
22.61 |
| 2026-05-15 12:00 |
20:04:59.12 |
-35:44:09.5 |
HIP 98870 |
16.64 |
| 2026-05-16 00:00 |
20:05:43.59 |
-35:50:00.2 |
HIP 98870 |
16.49 |
| 2026-05-16 12:00 |
20:06:27.77 |
-35:55:53.6 |
HIP 98870 |
22.22 |
| 2026-05-17 00:00 |
20:07:11.66 |
-36:01:49.5 |
HIP 99115 |
29.58 |
| 2026-05-17 12:00 |
20:07:55.25 |
-36:07:48.0 |
HIP 99345 |
23.73 |
| 2026-05-18 00:00 |
20:08:38.55 |
-36:13:49.1 |
HIP 99345 |
18.50 |
| 2026-05-18 12:00 |
20:09:21.54 |
-36:19:52.8 |
HIP 99296 |
10.39 |
| 2026-05-19 00:00 |
20:10:04.24 |
-36:25:59.1 |
HIP 99296 |
9.32 |
| 2026-05-19 12:00 |
20:10:46.62 |
-36:32:08.1 |
HIP 99368 |
10.43 |
| 2026-05-20 00:00 |
20:11:28.69 |
-36:38:19.6 |
HIP 99368 |
16.05 |
| 2026-05-20 12:00 |
20:12:10.45 |
-36:44:33.8 |
HIP 99718 |
24.12 |
| 2026-05-21 00:00 |
20:12:51.89 |
-36:50:50.6 |
HIP 99718 |
20.15 |
| 2026-05-21 12:00 |
20:13:33.01 |
-36:57:10.0 |
HIP 99718 |
21.22 |
| 2026-05-22 00:00 |
20:14:13.81 |
-37:03:32.0 |
HIP 99761 |
16.78 |
| 2026-05-22 12:00 |
20:14:54.27 |
-37:09:56.7 |
HIP 99761 |
11.53 |
| 2026-05-23 00:00 |
20:15:34.40 |
-37:16:24.0 |
HIP 99761 |
13.92 |
| 2026-05-23 12:00 |
20:16:14.20 |
-37:22:53.8 |
HIP 99949 |
12.29 |
| 2026-05-24 00:00 |
20:16:53.66 |
-37:29:26.3 |
HIP 99949 |
4.25 |
| 2026-05-24 12:00 |
20:17:32.77 |
-37:36:01.4 |
HIP 99949 |
9.59 |
| 2026-05-25 00:00 |
20:18:11.53 |
-37:42:39.2 |
HIP 99949 |
19.25 |
| 2026-05-25 12:00 |
20:18:49.95 |
-37:49:19.5 |
HIP 100119 |
16.40 |
| 2026-05-26 00:00 |
20:19:28.00 |
-37:56:02.4 |
HIP 100119 |
13.83 |
| 2026-05-26 12:00 |
20:20:05.70 |
-38:02:47.9 |
HIP 100119 |
17.70 |
| 2026-05-27 00:00 |
20:20:43.03 |
-38:09:36.0 |
HIP 100433 |
16.26 |
| 2026-05-27 12:00 |
20:21:19.99 |
-38:16:26.6 |
HIP 100433 |
14.30 |
| 2026-05-28 00:00 |
20:21:56.58 |
-38:23:19.9 |
HIP 100433 |
18.60 |
| 2026-05-28 12:00 |
20:22:32.79 |
-38:30:15.6 |
HIP 100433 |
26.21 |
| 2026-05-29 00:00 |
20:23:08.61 |
-38:37:14.0 |
HIP 100433 |
35.00 |
| 2026-05-29 12:00 |
20:23:44.05 |
-38:44:14.8 |
HIP 100743 |
41.23 |
| 2026-05-30 00:00 |
20:24:19.09 |
-38:51:18.2 |
HIP 100743 |
31.77 |
| 2026-05-30 12:00 |
20:24:53.73 |
-38:58:24.0 |
HIP 100743 |
22.61 |
| 2026-05-31 00:00 |
20:25:27.98 |
-39:05:32.4 |
HIP 100743 |
14.25 |
| 2026-05-31 12:00 |
20:26:01.81 |
-39:12:43.2 |
HIP 100743 |
9.13 |
| 2026-06-01 00:00 |
20:26:35.23 |
-39:19:56.5 |
HIP 100874 |
9.91 |
| 2026-06-01 12:00 |
20:27:08.23 |
-39:27:12.2 |
HIP 100904 |
6.80 |
| 2026-06-02 00:00 |
20:27:40.81 |
-39:34:30.3 |
HIP 100904 |
2.93 |