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) |
| 2026-05-12 00:00 |
04:41:56.81 |
+22:29:00.5 |
HIP 21840 |
15.21 |
| 2026-05-12 12:00 |
04:42:20.74 |
+22:29:21.3 |
HIP 21840 |
16.91 |
| 2026-05-13 00:00 |
04:42:44.73 |
+22:29:42.0 |
HIP 21840 |
20.05 |
| 2026-05-13 12:00 |
04:43:08.75 |
+22:30:02.6 |
HIP 22056 |
20.36 |
| 2026-05-14 00:00 |
04:43:32.82 |
+22:30:23.0 |
HIP 22056 |
14.93 |
| 2026-05-14 12:00 |
04:43:56.94 |
+22:30:43.3 |
HIP 22056 |
9.65 |
| 2026-05-15 00:00 |
04:44:21.10 |
+22:31:03.5 |
HIP 22056 |
5.04 |
| 2026-05-15 12:00 |
04:44:45.29 |
+22:31:23.5 |
HIP 22056 |
4.50 |
| 2026-05-16 00:00 |
04:45:09.53 |
+22:31:43.5 |
HIP 22056 |
8.83 |
| 2026-05-16 12:00 |
04:45:33.82 |
+22:32:03.2 |
HIP 22056 |
14.10 |
| 2026-05-17 00:00 |
04:45:58.14 |
+22:32:22.9 |
HIP 22222 |
16.14 |
| 2026-05-17 12:00 |
04:46:22.50 |
+22:32:42.4 |
HIP 22222 |
13.26 |
| 2026-05-18 00:00 |
04:46:46.89 |
+22:33:01.7 |
HIP 22222 |
12.44 |
| 2026-05-18 12:00 |
04:47:11.33 |
+22:33:20.9 |
HIP 22222 |
14.05 |
| 2026-05-19 00:00 |
04:47:35.80 |
+22:33:39.9 |
HIP 22222 |
17.44 |
| 2026-05-19 12:00 |
04:48:00.30 |
+22:33:58.8 |
HIP 22355 |
18.25 |
| 2026-05-20 00:00 |
04:48:24.85 |
+22:34:17.5 |
HIP 22355 |
16.06 |
| 2026-05-20 12:00 |
04:48:49.42 |
+22:34:36.1 |
HIP 22355 |
15.72 |
| 2026-05-21 00:00 |
04:49:14.03 |
+22:34:54.4 |
HIP 22355 |
17.35 |
| 2026-05-21 12:00 |
04:49:38.67 |
+22:35:12.7 |
HIP 22355 |
20.49 |
| 2026-05-22 00:00 |
04:50:03.34 |
+22:35:30.7 |
HIP 22355 |
24.58 |
| 2026-05-22 12:00 |
04:50:28.04 |
+22:35:48.6 |
HIP 22355 |
29.21 |
| 2026-05-23 00:00 |
04:50:52.77 |
+22:36:06.3 |
HIP 22691 |
26.35 |
| 2026-05-23 12:00 |
04:51:17.53 |
+22:36:23.8 |
HIP 22691 |
20.66 |
| 2026-05-24 00:00 |
04:51:42.32 |
+22:36:41.1 |
HIP 22691 |
14.98 |
| 2026-05-24 12:00 |
04:52:07.14 |
+22:36:58.2 |
HIP 22691 |
9.36 |
| 2026-05-25 00:00 |
04:52:31.98 |
+22:37:15.2 |
HIP 22691 |
4.05 |
| 2026-05-25 12:00 |
04:52:56.85 |
+22:37:31.9 |
HIP 22691 |
3.34 |
| 2026-05-26 00:00 |
04:53:21.75 |
+22:37:48.5 |
HIP 22691 |
8.49 |
| 2026-05-26 12:00 |
04:53:46.67 |
+22:38:04.9 |
HIP 22767 |
8.27 |
| 2026-05-27 00:00 |
04:54:11.62 |
+22:38:21.1 |
HIP 22767 |
9.14 |
| 2026-05-27 12:00 |
04:54:36.58 |
+22:38:37.1 |
HIP 22767 |
12.85 |
| 2026-05-28 00:00 |
04:55:01.58 |
+22:38:52.8 |
HIP 22935 |
15.61 |
| 2026-05-28 12:00 |
04:55:26.59 |
+22:39:08.4 |
HIP 22935 |
10.29 |
| 2026-05-29 00:00 |
04:55:51.63 |
+22:39:23.8 |
HIP 22935 |
5.91 |
| 2026-05-29 12:00 |
04:56:16.69 |
+22:39:38.9 |
HIP 22935 |
5.56 |
| 2026-05-30 00:00 |
04:56:41.77 |
+22:39:53.9 |
HIP 22935 |
9.69 |
| 2026-05-30 12:00 |
04:57:06.87 |
+22:40:08.6 |
HIP 22935 |
14.97 |
| 2026-05-31 00:00 |
04:57:31.99 |
+22:40:23.2 |
HIP 22935 |
20.53 |
| 2026-05-31 12:00 |
04:57:57.13 |
+22:40:37.5 |
HIP 22935 |
26.20 |
| 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 |