P/2025 D2 (PANSTARRS)
메타데이터
| 항목 |
값 |
| Designation |
P/2025 D2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2029-03-18T07:10:12.224640Z |
| Orbit solution date (soln_date, UTC) |
2025-10-28T16:12:49Z |
| Obs used |
22 |
| NEO |
- |
| M1 |
7.900 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-02-22T07:51:00.662400Z |
| Discovery magnitude (MPC) |
22.06 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-04-05.0000000 |
| e |
0.14998254 |
| q (au) |
7.402450 |
| a (au) |
8.708586 |
| i (deg) |
5.358355 |
| Ω (om, deg) |
257.178226 |
| ω (w, deg) |
318.377135 |
| M (ma, deg) |
304.647297 |
밝기
산란 + 전체 선형
$$
M_a = (3.951 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
3.951 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
2.707 |
| 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) |
| 2026-02-03 00:00 |
10:43:01.50 |
+01:41:48.8 |
HIP 52454 |
14.35 |
| 2026-02-03 12:00 |
10:42:52.97 |
+01:42:26.3 |
HIP 52454 |
14.73 |
| 2026-02-04 00:00 |
10:42:44.37 |
+01:43:04.5 |
HIP 52454 |
15.42 |
| 2026-02-04 12:00 |
10:42:35.70 |
+01:43:43.3 |
HIP 52454 |
16.39 |
| 2026-02-05 00:00 |
10:42:26.96 |
+01:44:22.7 |
HIP 52454 |
17.61 |
| 2026-02-05 12:00 |
10:42:18.16 |
+01:45:02.8 |
HIP 52454 |
19.04 |
| 2026-02-06 00:00 |
10:42:09.30 |
+01:45:43.4 |
HIP 52454 |
20.63 |
| 2026-02-06 12:00 |
10:42:00.38 |
+01:46:24.6 |
HIP 52454 |
22.36 |
| 2026-02-07 00:00 |
10:41:51.39 |
+01:47:06.4 |
HIP 52454 |
24.20 |
| 2026-02-07 12:00 |
10:41:42.34 |
+01:47:48.8 |
HIP 52454 |
26.14 |
| 2026-02-08 00:00 |
10:41:33.23 |
+01:48:31.8 |
HIP 52454 |
28.15 |
| 2026-02-08 12:00 |
10:41:24.07 |
+01:49:15.3 |
HIP 52454 |
30.23 |
| 2026-02-09 00:00 |
10:41:14.85 |
+01:49:59.4 |
HIP 52454 |
32.37 |
| 2026-02-09 12:00 |
10:41:05.58 |
+01:50:44.0 |
HIP 52454 |
34.55 |
| 2026-02-10 00:00 |
10:40:56.25 |
+01:51:29.2 |
HIP 52454 |
36.78 |
| 2026-02-10 12:00 |
10:40:46.87 |
+01:52:15.0 |
HIP 52205 |
37.01 |
| 2026-02-11 00:00 |
10:40:37.44 |
+01:53:01.3 |
HIP 52205 |
37.05 |
| 2026-02-11 12:00 |
10:40:27.96 |
+01:53:48.1 |
HIP 52205 |
37.26 |
| 2026-02-12 00:00 |
10:40:18.43 |
+01:54:35.4 |
HIP 52201 |
36.15 |
| 2026-02-12 12:00 |
10:40:08.85 |
+01:55:23.2 |
HIP 52201 |
35.06 |
| 2026-02-13 00:00 |
10:39:59.23 |
+01:56:11.6 |
HIP 52201 |
34.11 |
| 2026-02-13 12:00 |
10:39:49.57 |
+01:57:00.4 |
HIP 52201 |
33.32 |
| 2026-02-14 00:00 |
10:39:39.86 |
+01:57:49.8 |
HIP 52201 |
32.71 |
| 2026-02-14 12:00 |
10:39:30.12 |
+01:58:39.6 |
HIP 52201 |
32.28 |
| 2026-02-15 00:00 |
10:39:20.33 |
+01:59:29.9 |
HIP 52201 |
32.04 |
| 2026-02-15 12:00 |
10:39:10.51 |
+02:00:20.6 |
HIP 52201 |
32.01 |
| 2026-02-16 00:00 |
10:39:00.65 |
+02:01:11.8 |
HIP 52201 |
32.19 |
| 2026-02-16 12:00 |
10:38:50.76 |
+02:02:03.5 |
HIP 52201 |
32.57 |
| 2026-02-17 00:00 |
10:38:40.83 |
+02:02:55.6 |
HIP 52086 |
32.70 |
| 2026-02-17 12:00 |
10:38:30.87 |
+02:03:48.2 |
HIP 52086 |
31.82 |
| 2026-02-18 00:00 |
10:38:20.89 |
+02:04:41.1 |
HIP 52086 |
31.12 |
| 2026-02-18 12:00 |
10:38:10.87 |
+02:05:34.5 |
HIP 52086 |
30.64 |
| 2026-02-19 00:00 |
10:38:00.83 |
+02:06:28.3 |
HIP 52086 |
30.38 |
| 2026-02-19 12:00 |
10:37:50.76 |
+02:07:22.4 |
HIP 52086 |
30.34 |
| 2026-02-20 00:00 |
10:37:40.67 |
+02:08:17.0 |
HIP 52086 |
30.54 |
| 2026-02-20 12:00 |
10:37:30.56 |
+02:09:11.9 |
HIP 52086 |
30.97 |
| 2026-02-21 00:00 |
10:37:20.43 |
+02:10:07.3 |
HIP 52086 |
31.61 |
| 2026-02-21 12:00 |
10:37:10.28 |
+02:11:02.9 |
HIP 51809 |
31.04 |
| 2026-02-22 00:00 |
10:37:00.11 |
+02:11:58.9 |
HIP 51809 |
28.48 |
| 2026-02-22 12:00 |
10:36:49.93 |
+02:12:55.3 |
HIP 51809 |
25.94 |
| 2026-02-23 00:00 |
10:36:39.74 |
+02:13:52.0 |
HIP 51809 |
23.44 |
| 2026-02-23 12:00 |
10:36:29.53 |
+02:14:49.0 |
HIP 51809 |
20.99 |
| 2026-02-24 00:00 |
10:36:19.31 |
+02:15:46.3 |
HIP 51809 |
18.62 |