메타데이터
| 항목 |
값 |
| Designation |
325P/Yang-Gao |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-05-22T10:39:09.037440Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:23Z |
| Obs used |
1380 |
| NEO |
Yes |
| M1 |
15.400 |
| K1 |
14.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
1951-05-28T04:33:01.440000Z |
| Discovery magnitude (MPC) |
14.00 T |
| Discovery observatory (MPC) |
711 · McDonald Observatory, Fort Davis |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-02-21.0000000 |
| e |
0.62430563 |
| q (au) |
1.279484 |
| a (au) |
3.405652 |
| i (deg) |
16.332066 |
| Ω (om, deg) |
258.854199 |
| ω (w, deg) |
346.999249 |
| M (ma, deg) |
157.535327 |
밝기
산란 + 전체 선형
$$
M_a = (16.250 + 5.930\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.250 |
| n |
5.930 |
| gf |
1.000 |
| gb |
-0.578 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
04:58:22.28 |
+22:40:51.6 |
HIP 23247 |
25.37 |
| 2026-06-01 12:00 |
04:58:47.46 |
+22:41:05.4 |
HIP 23247 |
19.79 |
| 2026-06-02 00:00 |
04:59:12.65 |
+22:41:19.1 |
HIP 23247 |
14.39 |
| 2026-06-02 12:00 |
04:59:37.86 |
+22:41:32.5 |
HIP 23247 |
9.49 |
| 2026-06-03 00:00 |
05:00:03.08 |
+22:41:45.7 |
HIP 23247 |
6.39 |
| 2026-06-03 12:00 |
05:00:28.32 |
+22:41:58.7 |
HIP 23284 |
5.17 |
| 2026-06-04 00:00 |
05:00:53.57 |
+22:42:11.4 |
HIP 23284 |
6.99 |
| 2026-06-04 12:00 |
05:01:18.84 |
+22:42:23.9 |
HIP 23284 |
11.79 |
| 2026-06-05 00:00 |
05:01:44.12 |
+22:42:36.2 |
HIP 23284 |
17.24 |
| 2026-06-05 12:00 |
05:02:09.42 |
+22:42:48.2 |
HIP 23284 |
22.88 |
| 2026-06-06 00:00 |
05:02:34.72 |
+22:43:00.0 |
HIP 23561 |
21.95 |
| 2026-06-06 12:00 |
05:03:00.04 |
+22:43:11.5 |
HIP 23561 |
17.26 |
| 2026-06-07 00:00 |
05:03:25.37 |
+22:43:22.8 |
HIP 23561 |
13.51 |
| 2026-06-07 12:00 |
05:03:50.71 |
+22:43:33.9 |
HIP 23561 |
11.64 |
| 2026-06-08 00:00 |
05:04:16.06 |
+22:43:44.7 |
HIP 23561 |
12.52 |
| 2026-06-08 12:00 |
05:04:41.42 |
+22:43:55.3 |
HIP 23561 |
15.70 |
| 2026-06-09 00:00 |
05:05:06.79 |
+22:44:05.6 |
HIP 23561 |
20.11 |
| 2026-06-09 12:00 |
05:05:32.16 |
+22:44:15.7 |
HIP 23699 |
19.45 |
| 2026-06-10 00:00 |
05:05:57.54 |
+22:44:25.5 |
HIP 23784 |
17.03 |
| 2026-06-10 12:00 |
05:06:22.93 |
+22:44:35.0 |
HIP 23784 |
14.54 |
| 2026-06-11 00:00 |
05:06:48.33 |
+22:44:44.3 |
HIP 23784 |
14.20 |
| 2026-06-11 12:00 |
05:07:13.73 |
+22:44:53.4 |
HIP 23784 |
16.13 |
| 2026-06-12 00:00 |
05:07:39.13 |
+22:45:02.1 |
HIP 23784 |
19.68 |
| 2026-06-12 12:00 |
05:08:04.54 |
+22:45:10.6 |
HIP 23784 |
24.15 |
| 2026-06-13 00:00 |
05:08:29.95 |
+22:45:18.9 |
HIP 23917 |
27.64 |
| 2026-06-13 12:00 |
05:08:55.36 |
+22:45:26.9 |
HIP 23917 |
28.58 |
| 2026-06-14 00:00 |
05:09:20.77 |
+22:45:34.6 |
HIP 23917 |
30.63 |
| 2026-06-14 12:00 |
05:09:46.18 |
+22:45:42.0 |
HIP 24151 |
26.73 |
| 2026-06-15 00:00 |
05:10:11.59 |
+22:45:49.2 |
HIP 24151 |
22.69 |
| 2026-06-15 12:00 |
05:10:37.01 |
+22:45:56.1 |
HIP 24151 |
19.59 |
| 2026-06-16 00:00 |
05:11:02.41 |
+22:46:02.7 |
HIP 24151 |
17.92 |
| 2026-06-16 12:00 |
05:11:27.82 |
+22:46:09.0 |
HIP 24151 |
18.09 |
| 2026-06-17 00:00 |
05:11:53.22 |
+22:46:15.1 |
HIP 24151 |
20.05 |
| 2026-06-17 12:00 |
05:12:18.62 |
+22:46:20.9 |
HIP 24151 |
23.36 |
| 2026-06-18 00:00 |
05:12:44.01 |
+22:46:26.4 |
HIP 24415 |
22.95 |
| 2026-06-18 12:00 |
05:13:09.39 |
+22:46:31.6 |
HIP 24415 |
17.48 |
| 2026-06-19 00:00 |
05:13:34.77 |
+22:46:36.5 |
HIP 24415 |
12.38 |
| 2026-06-19 12:00 |
05:14:00.14 |
+22:46:41.2 |
HIP 24415 |
8.32 |
| 2026-06-20 00:00 |
05:14:25.51 |
+22:46:45.6 |
HIP 24415 |
7.32 |
| 2026-06-20 12:00 |
05:14:50.86 |
+22:46:49.6 |
HIP 24415 |
10.31 |
| 2026-06-21 00:00 |
05:15:16.20 |
+22:46:53.4 |
HIP 24415 |
15.07 |
| 2026-06-21 12:00 |
05:15:41.53 |
+22:46:56.9 |
HIP 24415 |
20.40 |
| 2026-06-22 00:00 |
05:16:06.86 |
+22:47:00.2 |
HIP 24668 |
19.91 |