메타데이터
| 항목 |
값 |
| Designation |
P/2025 Y2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-12-07T01:30:07.136640Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:39Z |
| Obs used |
304 |
| NEO |
- |
| M1 |
14.800 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-12-27T14:05:50.582400Z |
| Discovery magnitude (MPC) |
20.46 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2026-03-25.0000000 |
| e |
0.24152621 |
| q (au) |
3.046892 |
| a (au) |
4.017136 |
| i (deg) |
16.587440 |
| Ω (om, deg) |
177.477184 |
| ω (w, deg) |
344.705855 |
| M (ma, deg) |
13.212998 |
밝기
산란 + 전체 선형
$$
M_a = (17.467 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.467 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.732 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
12:51:32.29 |
+02:53:57.7 |
HIP 62757 |
9.51 |
| 2026-07-29 12:00 |
12:52:03.75 |
+02:51:05.8 |
HIP 62757 |
14.01 |
| 2026-07-30 00:00 |
12:52:35.32 |
+02:48:13.4 |
HIP 62924 |
18.80 |
| 2026-07-30 12:00 |
12:53:06.99 |
+02:45:20.3 |
HIP 62924 |
10.48 |
| 2026-07-31 00:00 |
12:53:38.77 |
+02:42:26.7 |
HIP 62924 |
2.83 |
| 2026-07-31 12:00 |
12:54:10.64 |
+02:39:32.5 |
HIP 62966 |
1.54 |
| 2026-08-01 00:00 |
12:54:42.62 |
+02:36:37.7 |
HIP 62966 |
8.05 |
| 2026-08-01 12:00 |
12:55:14.71 |
+02:33:42.4 |
HIP 63037 |
14.10 |
| 2026-08-02 00:00 |
12:55:46.89 |
+02:30:46.5 |
HIP 63037 |
15.48 |
| 2026-08-02 12:00 |
12:56:19.17 |
+02:27:50.1 |
HIP 63037 |
20.68 |
| 2026-08-03 00:00 |
12:56:51.55 |
+02:24:53.2 |
HIP 63037 |
27.64 |
| 2026-08-03 12:00 |
12:57:24.03 |
+02:21:55.7 |
HIP 63037 |
35.37 |
| 2026-08-04 00:00 |
12:57:56.61 |
+02:18:57.7 |
HIP 63455 |
33.25 |
| 2026-08-04 12:00 |
12:58:29.29 |
+02:15:59.3 |
HIP 63455 |
25.82 |
| 2026-08-05 00:00 |
12:59:02.06 |
+02:13:00.3 |
HIP 63455 |
19.44 |
| 2026-08-05 12:00 |
12:59:34.93 |
+02:10:00.9 |
HIP 63455 |
15.52 |
| 2026-08-06 00:00 |
13:00:07.90 |
+02:07:00.9 |
HIP 63455 |
16.03 |
| 2026-08-06 12:00 |
13:00:40.96 |
+02:04:00.5 |
HIP 63455 |
20.67 |
| 2026-08-07 00:00 |
13:01:14.12 |
+02:00:59.7 |
HIP 63455 |
27.45 |
| 2026-08-07 12:00 |
13:01:47.37 |
+01:57:58.3 |
HIP 63560 |
27.09 |
| 2026-08-08 00:00 |
13:02:20.71 |
+01:54:56.6 |
HIP 63560 |
26.85 |
| 2026-08-08 12:00 |
13:02:54.15 |
+01:51:54.4 |
HIP 63560 |
29.42 |
| 2026-08-09 00:00 |
13:03:27.68 |
+01:48:51.8 |
HIP 63884 |
30.89 |
| 2026-08-09 12:00 |
13:04:01.30 |
+01:45:48.7 |
HIP 63884 |
22.58 |
| 2026-08-10 00:00 |
13:04:35.01 |
+01:42:45.2 |
HIP 63884 |
15.00 |
| 2026-08-10 12:00 |
13:05:08.82 |
+01:39:41.4 |
HIP 63884 |
10.02 |
| 2026-08-11 00:00 |
13:05:42.71 |
+01:36:37.1 |
HIP 63884 |
11.73 |
| 2026-08-11 12:00 |
13:06:16.69 |
+01:33:32.5 |
HIP 63884 |
18.38 |
| 2026-08-12 00:00 |
13:06:50.76 |
+01:30:27.5 |
HIP 64051 |
11.63 |
| 2026-08-12 12:00 |
13:07:24.92 |
+01:27:22.2 |
HIP 64051 |
3.12 |
| 2026-08-13 00:00 |
13:07:59.17 |
+01:24:16.4 |
HIP 64082 |
4.05 |
| 2026-08-13 12:00 |
13:08:33.50 |
+01:21:10.4 |
HIP 64082 |
9.36 |
| 2026-08-14 00:00 |
13:09:07.92 |
+01:18:04.0 |
HIP 64082 |
18.05 |
| 2026-08-14 12:00 |
13:09:42.42 |
+01:14:57.3 |
HIP 64082 |
27.07 |
| 2026-08-15 00:00 |
13:10:17.01 |
+01:11:50.3 |
HIP 64207 |
29.47 |
| 2026-08-15 12:00 |
13:10:51.68 |
+01:08:43.0 |
HIP 64207 |
31.26 |
| 2026-08-16 00:00 |
13:11:26.43 |
+01:05:35.4 |
HIP 64207 |
35.45 |
| 2026-08-16 12:00 |
13:12:01.26 |
+01:02:27.5 |
HIP 64586 |
35.58 |
| 2026-08-17 00:00 |
13:12:36.18 |
+00:59:19.3 |
HIP 64586 |
28.81 |
| 2026-08-17 12:00 |
13:13:11.17 |
+00:56:10.9 |
HIP 64586 |
23.77 |
| 2026-08-18 00:00 |
13:13:46.25 |
+00:53:02.2 |
HIP 64586 |
21.74 |
| 2026-08-18 12:00 |
13:14:21.40 |
+00:49:53.3 |
HIP 64586 |
23.54 |
| 2026-08-19 00:00 |
13:14:56.63 |
+00:46:44.1 |
HIP 64586 |
28.47 |