메타데이터
| 항목 |
값 |
| Designation |
P/2025 A2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-10-05T15:17:25.509120Z |
| Orbit solution date (soln_date, UTC) |
2025-04-11T14:45:09Z |
| Obs used |
66 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-01-07T09:59:40.761600Z |
| Discovery magnitude (MPC) |
21.00 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-01-22.0000000 |
| e |
0.32241041 |
| q (au) |
3.446251 |
| a (au) |
5.086044 |
| i (deg) |
20.732644 |
| Ω (om, deg) |
189.324202 |
| ω (w, deg) |
278.033834 |
| M (ma, deg) |
9.311389 |
밝기
산란 + 전체 선형
$$
M_a = (15.115 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.115 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.998 |
| 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 |
12:13:55.61 |
+00:12:47.3 |
HIP 59429 |
37.57 |
| 2026-05-12 12:00 |
12:13:51.54 |
+00:14:32.3 |
HIP 59429 |
36.65 |
| 2026-05-13 00:00 |
12:13:47.67 |
+00:16:15.7 |
HIP 59429 |
35.86 |
| 2026-05-13 12:00 |
12:13:43.99 |
+00:17:57.4 |
HIP 59429 |
35.22 |
| 2026-05-14 00:00 |
12:13:40.50 |
+00:19:37.5 |
HIP 59429 |
34.71 |
| 2026-05-14 12:00 |
12:13:37.21 |
+00:21:16.0 |
HIP 59429 |
34.33 |
| 2026-05-15 00:00 |
12:13:34.12 |
+00:22:52.7 |
HIP 59429 |
34.09 |
| 2026-05-15 12:00 |
12:13:31.23 |
+00:24:27.9 |
HIP 59429 |
33.97 |
| 2026-05-16 00:00 |
12:13:28.53 |
+00:26:01.4 |
HIP 59429 |
33.98 |
| 2026-05-16 12:00 |
12:13:26.03 |
+00:27:33.2 |
HIP 59429 |
34.10 |
| 2026-05-17 00:00 |
12:13:23.73 |
+00:29:03.4 |
HIP 59429 |
34.33 |
| 2026-05-17 12:00 |
12:13:21.62 |
+00:30:31.9 |
HIP 59429 |
34.66 |
| 2026-05-18 00:00 |
12:13:19.72 |
+00:31:58.7 |
HIP 59429 |
35.08 |
| 2026-05-18 12:00 |
12:13:18.01 |
+00:33:23.9 |
HIP 59429 |
35.59 |
| 2026-05-19 00:00 |
12:13:16.50 |
+00:34:47.4 |
HIP 59429 |
36.16 |
| 2026-05-19 12:00 |
12:13:15.19 |
+00:36:09.3 |
HIP 59429 |
36.81 |
| 2026-05-20 00:00 |
12:13:14.08 |
+00:37:29.5 |
HIP 59500 |
36.64 |
| 2026-05-20 12:00 |
12:13:13.17 |
+00:38:48.0 |
HIP 59500 |
35.37 |
| 2026-05-21 00:00 |
12:13:12.46 |
+00:40:04.9 |
HIP 59500 |
34.15 |
| 2026-05-21 12:00 |
12:13:11.94 |
+00:41:20.2 |
HIP 59500 |
32.99 |
| 2026-05-22 00:00 |
12:13:11.63 |
+00:42:33.8 |
HIP 59500 |
31.89 |
| 2026-05-22 12:00 |
12:13:11.51 |
+00:43:45.7 |
HIP 59500 |
30.84 |
| 2026-05-23 00:00 |
12:13:11.59 |
+00:44:56.0 |
HIP 59500 |
29.85 |
| 2026-05-23 12:00 |
12:13:11.87 |
+00:46:04.7 |
HIP 59500 |
28.93 |
| 2026-05-24 00:00 |
12:13:12.34 |
+00:47:11.7 |
HIP 59500 |
28.07 |
| 2026-05-24 12:00 |
12:13:13.01 |
+00:48:17.1 |
HIP 59500 |
27.28 |
| 2026-05-25 00:00 |
12:13:13.88 |
+00:49:20.9 |
HIP 59500 |
26.57 |
| 2026-05-25 12:00 |
12:13:14.94 |
+00:50:23.0 |
HIP 59500 |
25.94 |
| 2026-05-26 00:00 |
12:13:16.20 |
+00:51:23.5 |
HIP 59500 |
25.39 |
| 2026-05-26 12:00 |
12:13:17.65 |
+00:52:22.4 |
HIP 59500 |
24.92 |
| 2026-05-27 00:00 |
12:13:19.30 |
+00:53:19.7 |
HIP 59500 |
24.55 |
| 2026-05-27 12:00 |
12:13:21.15 |
+00:54:15.4 |
HIP 59500 |
24.27 |
| 2026-05-28 00:00 |
12:13:23.18 |
+00:55:09.5 |
HIP 59500 |
24.08 |
| 2026-05-28 12:00 |
12:13:25.41 |
+00:56:02.0 |
HIP 59500 |
23.99 |
| 2026-05-29 00:00 |
12:13:27.83 |
+00:56:52.9 |
HIP 59500 |
24.00 |
| 2026-05-29 12:00 |
12:13:30.45 |
+00:57:42.2 |
HIP 59500 |
24.11 |
| 2026-05-30 00:00 |
12:13:33.25 |
+00:58:30.0 |
HIP 59500 |
24.32 |
| 2026-05-30 12:00 |
12:13:36.25 |
+00:59:16.2 |
HIP 59500 |
24.63 |
| 2026-05-31 00:00 |
12:13:39.44 |
+01:00:00.8 |
HIP 59500 |
25.04 |
| 2026-05-31 12:00 |
12:13:42.82 |
+01:00:43.8 |
HIP 59500 |
25.54 |
| 2026-06-01 00:00 |
12:13:46.38 |
+01:01:25.3 |
HIP 59500 |
26.13 |
| 2026-06-01 12:00 |
12:13:50.14 |
+01:02:05.2 |
HIP 59500 |
26.81 |
| 2026-06-02 00:00 |
12:13:54.09 |
+01:02:43.6 |
HIP 59500 |
27.57 |