메타데이터
| 항목 |
값 |
| Designation |
P/2025 Y2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-12-07T01:30:57.646080Z |
| Orbit solution date (soln_date, UTC) |
2026-09-04T08:42:14Z |
| Obs used |
306 |
| 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) |
2026-03-26.0000000 |
| e |
0.24152600 |
| q (au) |
3.046894 |
| a (au) |
4.017137 |
| i (deg) |
16.587455 |
| Ω (om, deg) |
177.477189 |
| ω (w, deg) |
344.705990 |
| M (ma, deg) |
13.335333 |
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) |
| 2026-09-20 00:00 |
13:54:49.37 |
-02:37:19.6 |
HIP 67946 |
14.52 |
| 2026-09-20 12:00 |
13:55:28.58 |
-02:40:27.7 |
HIP 67946 |
19.88 |
| 2026-09-21 00:00 |
13:56:07.83 |
-02:43:35.5 |
HIP 67946 |
28.13 |
| 2026-09-21 12:00 |
13:56:47.13 |
-02:46:43.1 |
HIP 68121 |
26.53 |
| 2026-09-22 00:00 |
13:57:26.47 |
-02:49:50.4 |
HIP 68297 |
21.74 |
| 2026-09-22 12:00 |
13:58:05.86 |
-02:52:57.5 |
HIP 68297 |
11.47 |
| 2026-09-23 00:00 |
13:58:45.29 |
-02:56:04.2 |
HIP 68297 |
1.89 |
| 2026-09-23 12:00 |
13:59:24.76 |
-02:59:10.6 |
HIP 68297 |
9.43 |
| 2026-09-24 00:00 |
14:00:04.27 |
-03:02:16.8 |
HIP 68297 |
19.70 |
| 2026-09-24 12:00 |
14:00:43.83 |
-03:05:22.6 |
HIP 68469 |
26.47 |
| 2026-09-25 00:00 |
14:01:23.43 |
-03:08:28.1 |
HIP 68469 |
29.51 |
| 2026-09-25 12:00 |
14:02:03.07 |
-03:11:33.3 |
HIP 68469 |
35.43 |
| 2026-09-26 00:00 |
14:02:42.75 |
-03:14:38.2 |
HIP 68755 |
28.43 |
| 2026-09-26 12:00 |
14:03:22.47 |
-03:17:42.8 |
HIP 68755 |
18.34 |
| 2026-09-27 00:00 |
14:04:02.23 |
-03:20:47.0 |
HIP 68755 |
8.94 |
| 2026-09-27 12:00 |
14:04:42.03 |
-03:23:50.9 |
HIP 68755 |
6.29 |
| 2026-09-28 00:00 |
14:05:21.87 |
-03:26:54.4 |
HIP 68755 |
14.68 |
| 2026-09-28 12:00 |
14:06:01.75 |
-03:29:57.6 |
HIP 68755 |
24.67 |
| 2026-09-29 00:00 |
14:06:41.67 |
-03:33:00.4 |
HIP 68755 |
34.91 |
| 2026-09-29 12:00 |
14:07:21.63 |
-03:36:02.8 |
HIP 68899 |
36.68 |
| 2026-09-30 00:00 |
14:08:01.63 |
-03:39:04.9 |
HIP 68899 |
39.17 |
| 2026-09-30 12:00 |
14:08:41.67 |
-03:42:06.6 |
HIP 69152 |
39.67 |
| 2026-10-01 00:00 |
14:09:21.74 |
-03:45:07.9 |
HIP 69328 |
38.67 |
| 2026-10-01 12:00 |
14:10:01.85 |
-03:48:08.9 |
HIP 69328 |
34.07 |
| 2026-10-02 00:00 |
14:10:42.00 |
-03:51:09.4 |
HIP 69328 |
32.33 |
| 2026-10-02 12:00 |
14:11:22.19 |
-03:54:09.6 |
HIP 69328 |
33.88 |
| 2026-10-03 00:00 |
14:12:02.42 |
-03:57:09.3 |
HIP 69537 |
33.01 |
| 2026-10-03 12:00 |
14:12:42.68 |
-04:00:08.6 |
HIP 69537 |
25.60 |
| 2026-10-04 00:00 |
14:13:22.97 |
-04:03:07.5 |
HIP 69537 |
20.98 |
| 2026-10-04 12:00 |
14:14:03.31 |
-04:06:06.0 |
HIP 69537 |
21.08 |
| 2026-10-05 00:00 |
14:14:43.68 |
-04:09:04.1 |
HIP 69724 |
25.39 |
| 2026-10-05 12:00 |
14:15:24.08 |
-04:12:01.7 |
HIP 69724 |
14.90 |
| 2026-10-06 00:00 |
14:16:04.52 |
-04:14:58.9 |
HIP 69724 |
4.46 |
| 2026-10-06 12:00 |
14:16:45.00 |
-04:17:55.6 |
HIP 69789 |
4.79 |
| 2026-10-07 00:00 |
14:17:25.50 |
-04:20:51.8 |
HIP 69817 |
5.04 |
| 2026-10-07 12:00 |
14:18:06.04 |
-04:23:47.6 |
HIP 69817 |
13.75 |
| 2026-10-08 00:00 |
14:18:46.62 |
-04:26:42.9 |
HIP 70004 |
22.81 |
| 2026-10-08 12:00 |
14:19:27.22 |
-04:29:37.8 |
HIP 70004 |
23.30 |
| 2026-10-09 00:00 |
14:20:07.86 |
-04:32:32.1 |
HIP 70161 |
19.06 |
| 2026-10-09 12:00 |
14:20:48.53 |
-04:35:25.9 |
HIP 70161 |
8.63 |
| 2026-10-10 00:00 |
14:21:29.23 |
-04:38:19.3 |
HIP 70161 |
2.83 |
| 2026-10-10 12:00 |
14:22:09.96 |
-04:41:12.1 |
HIP 70161 |
12.81 |
| 2026-10-11 00:00 |
14:22:50.73 |
-04:44:04.4 |
HIP 70161 |
23.31 |