메타데이터
| 항목 |
값 |
| Designation |
P/2009 T2 (La Sagra) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-01-12T20:11:46.766400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:35Z |
| Obs used |
882 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
10.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-11-18.0000000 |
| e |
0.76899059 |
| q (au) |
1.754750 |
| a (au) |
7.596009 |
| i (deg) |
28.106386 |
| Ω (om, deg) |
215.985632 |
| ω (w, deg) |
215.470914 |
| M (ma, deg) |
357.371046 |
밝기
산란 + 전체 선형
$$
M_a = (12.467 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.467 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.867 |
| k |
0.998 |
| δ90 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
18:15:44.51 |
+02:12:16.4 |
HIP 89527 |
11.64 |
| 2026-06-01 12:00 |
18:15:35.76 |
+02:12:51.9 |
HIP 89527 |
12.30 |
| 2026-06-02 00:00 |
18:15:26.96 |
+02:13:26.8 |
HIP 89527 |
13.34 |
| 2026-06-02 12:00 |
18:15:18.12 |
+02:14:01.2 |
HIP 89527 |
14.67 |
| 2026-06-03 00:00 |
18:15:09.23 |
+02:14:34.9 |
HIP 89527 |
16.22 |
| 2026-06-03 12:00 |
18:15:00.30 |
+02:15:08.1 |
HIP 89527 |
17.96 |
| 2026-06-04 00:00 |
18:14:51.33 |
+02:15:40.7 |
HIP 89347 |
16.76 |
| 2026-06-04 12:00 |
18:14:42.31 |
+02:16:12.7 |
HIP 89347 |
14.54 |
| 2026-06-05 00:00 |
18:14:33.26 |
+02:16:44.1 |
HIP 89347 |
12.34 |
| 2026-06-05 12:00 |
18:14:24.16 |
+02:17:14.9 |
HIP 89347 |
10.20 |
| 2026-06-06 00:00 |
18:14:15.02 |
+02:17:45.2 |
HIP 89347 |
8.17 |
| 2026-06-06 12:00 |
18:14:05.84 |
+02:18:14.8 |
HIP 89347 |
6.35 |
| 2026-06-07 00:00 |
18:13:56.63 |
+02:18:43.8 |
HIP 89347 |
5.00 |
| 2026-06-07 12:00 |
18:13:47.38 |
+02:19:12.2 |
HIP 89347 |
4.57 |
| 2026-06-08 00:00 |
18:13:38.09 |
+02:19:40.0 |
HIP 89347 |
5.29 |
| 2026-06-08 12:00 |
18:13:28.76 |
+02:20:07.2 |
HIP 89347 |
6.82 |
| 2026-06-09 00:00 |
18:13:19.41 |
+02:20:33.8 |
HIP 89347 |
8.74 |
| 2026-06-09 12:00 |
18:13:10.02 |
+02:20:59.7 |
HIP 89347 |
10.86 |
| 2026-06-10 00:00 |
18:13:00.59 |
+02:21:25.1 |
HIP 89347 |
13.08 |
| 2026-06-10 12:00 |
18:12:51.14 |
+02:21:49.8 |
HIP 89347 |
15.36 |
| 2026-06-11 00:00 |
18:12:41.65 |
+02:22:13.9 |
HIP 89347 |
17.68 |
| 2026-06-11 12:00 |
18:12:32.13 |
+02:22:37.3 |
HIP 89137 |
19.88 |
| 2026-06-12 00:00 |
18:12:22.59 |
+02:23:00.1 |
HIP 89137 |
18.37 |
| 2026-06-12 12:00 |
18:12:13.02 |
+02:23:22.3 |
HIP 89137 |
17.07 |
| 2026-06-13 00:00 |
18:12:03.42 |
+02:23:43.9 |
HIP 89137 |
16.01 |
| 2026-06-13 12:00 |
18:11:53.79 |
+02:24:04.8 |
HIP 89137 |
15.26 |
| 2026-06-14 00:00 |
18:11:44.15 |
+02:24:25.1 |
HIP 89137 |
14.85 |
| 2026-06-14 12:00 |
18:11:34.47 |
+02:24:44.7 |
HIP 89137 |
14.83 |
| 2026-06-15 00:00 |
18:11:24.78 |
+02:25:03.7 |
HIP 89137 |
15.20 |
| 2026-06-15 12:00 |
18:11:15.06 |
+02:25:22.0 |
HIP 89137 |
15.93 |
| 2026-06-16 00:00 |
18:11:05.33 |
+02:25:39.7 |
HIP 89137 |
16.97 |
| 2026-06-16 12:00 |
18:10:55.57 |
+02:25:56.7 |
HIP 89137 |
18.27 |
| 2026-06-17 00:00 |
18:10:45.80 |
+02:26:13.1 |
HIP 89137 |
19.79 |
| 2026-06-17 12:00 |
18:10:36.01 |
+02:26:28.9 |
HIP 89137 |
21.48 |
| 2026-06-18 00:00 |
18:10:26.20 |
+02:26:43.9 |
HIP 89137 |
23.30 |
| 2026-06-18 12:00 |
18:10:16.38 |
+02:26:58.4 |
HIP 88897 |
24.35 |
| 2026-06-19 00:00 |
18:10:06.55 |
+02:27:12.2 |
HIP 88897 |
22.40 |
| 2026-06-19 12:00 |
18:09:56.71 |
+02:27:25.3 |
HIP 88897 |
20.55 |
| 2026-06-20 00:00 |
18:09:46.85 |
+02:27:37.7 |
HIP 88897 |
18.83 |
| 2026-06-20 12:00 |
18:09:36.98 |
+02:27:49.6 |
HIP 88897 |
17.29 |
| 2026-06-21 00:00 |
18:09:27.10 |
+02:28:00.7 |
HIP 88897 |
15.97 |
| 2026-06-21 12:00 |
18:09:17.22 |
+02:28:11.2 |
HIP 88897 |
14.94 |
| 2026-06-22 00:00 |
18:09:07.32 |
+02:28:21.1 |
HIP 88897 |
14.26 |