P/2025 D3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2025 D3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-07-25T15:47:32.513280Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:39Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
17.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-02-22T10:22:18.192000Z |
| Discovery magnitude (MPC) |
21.65 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2025-02-24.0000000 |
| e |
0.25244615 |
| q (au) |
2.965357 |
| a (au) |
3.966747 |
| i (deg) |
9.644276 |
| Ω (om, deg) |
186.635562 |
| ω (w, deg) |
294.451918 |
| M (ma, deg) |
26.615137 |
等級
散乱 + 全体線形
$$
M_a = (18.470 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.470 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-0.545 |
| k |
0.800 |
| δ90 |
9.999 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
15:31:42.25 |
-13:44:30.8 |
HIP 75931 |
17.37 |
| 2026-02-03 12:00 |
15:32:02.48 |
-13:44:33.8 |
HIP 75931 |
22.22 |
| 2026-02-04 00:00 |
15:32:22.52 |
-13:44:35.8 |
HIP 75931 |
27.04 |
| 2026-02-04 12:00 |
15:32:42.36 |
-13:44:36.6 |
HIP 75931 |
31.83 |
| 2026-02-05 00:00 |
15:33:02.01 |
-13:44:36.4 |
HIP 76209 |
32.75 |
| 2026-02-05 12:00 |
15:33:21.47 |
-13:44:35.1 |
HIP 76209 |
30.91 |
| 2026-02-06 00:00 |
15:33:40.72 |
-13:44:32.6 |
HIP 76209 |
29.74 |
| 2026-02-06 12:00 |
15:33:59.78 |
-13:44:29.1 |
HIP 76209 |
29.30 |
| 2026-02-07 00:00 |
15:34:18.65 |
-13:44:24.5 |
HIP 76209 |
29.59 |
| 2026-02-07 12:00 |
15:34:37.31 |
-13:44:18.9 |
HIP 76323 |
27.56 |
| 2026-02-08 00:00 |
15:34:55.77 |
-13:44:12.1 |
HIP 76323 |
25.93 |
| 2026-02-08 12:00 |
15:35:14.02 |
-13:44:04.2 |
HIP 76323 |
24.99 |
| 2026-02-09 00:00 |
15:35:32.07 |
-13:43:55.3 |
HIP 76323 |
24.81 |
| 2026-02-09 12:00 |
15:35:49.92 |
-13:43:45.2 |
HIP 76323 |
25.36 |
| 2026-02-10 00:00 |
15:36:07.55 |
-13:43:34.1 |
HIP 76323 |
26.58 |
| 2026-02-10 12:00 |
15:36:24.98 |
-13:43:21.9 |
HIP 76484 |
24.30 |
| 2026-02-11 00:00 |
15:36:42.20 |
-13:43:08.5 |
HIP 76484 |
22.26 |
| 2026-02-11 12:00 |
15:36:59.21 |
-13:42:54.1 |
HIP 76484 |
20.87 |
| 2026-02-12 00:00 |
15:37:16.00 |
-13:42:38.6 |
HIP 76484 |
20.22 |
| 2026-02-12 12:00 |
15:37:32.58 |
-13:42:22.0 |
HIP 76484 |
20.37 |
| 2026-02-13 00:00 |
15:37:48.94 |
-13:42:04.3 |
HIP 76484 |
21.25 |
| 2026-02-13 12:00 |
15:38:05.09 |
-13:41:45.6 |
HIP 76484 |
22.77 |
| 2026-02-14 00:00 |
15:38:21.02 |
-13:41:25.7 |
HIP 76676 |
20.66 |
| 2026-02-14 12:00 |
15:38:36.73 |
-13:41:04.7 |
HIP 76676 |
18.16 |
| 2026-02-15 00:00 |
15:38:52.22 |
-13:40:42.7 |
HIP 76676 |
16.22 |
| 2026-02-15 12:00 |
15:39:07.48 |
-13:40:19.5 |
HIP 76676 |
15.04 |
| 2026-02-16 00:00 |
15:39:22.52 |
-13:39:55.3 |
HIP 76676 |
14.76 |
| 2026-02-16 12:00 |
15:39:37.34 |
-13:39:30.0 |
HIP 76676 |
15.38 |
| 2026-02-17 00:00 |
15:39:51.93 |
-13:39:03.6 |
HIP 76676 |
16.77 |
| 2026-02-17 12:00 |
15:40:06.30 |
-13:38:36.1 |
HIP 76789 |
15.55 |
| 2026-02-18 00:00 |
15:40:20.43 |
-13:38:07.6 |
HIP 76789 |
14.26 |
| 2026-02-18 12:00 |
15:40:34.34 |
-13:37:37.9 |
HIP 76789 |
13.78 |
| 2026-02-19 00:00 |
15:40:48.02 |
-13:37:07.2 |
HIP 76789 |
14.13 |
| 2026-02-19 12:00 |
15:41:01.46 |
-13:36:35.4 |
HIP 76789 |
15.24 |
| 2026-02-20 00:00 |
15:41:14.67 |
-13:36:02.5 |
HIP 76789 |
16.93 |
| 2026-02-20 12:00 |
15:41:27.65 |
-13:35:28.6 |
HIP 76789 |
19.01 |
| 2026-02-21 00:00 |
15:41:40.39 |
-13:34:53.6 |
HIP 76789 |
21.34 |
| 2026-02-21 12:00 |
15:41:52.90 |
-13:34:17.5 |
HIP 76983 |
18.67 |
| 2026-02-22 00:00 |
15:42:05.17 |
-13:33:40.4 |
HIP 76983 |
15.67 |
| 2026-02-22 12:00 |
15:42:17.20 |
-13:33:02.1 |
HIP 76983 |
12.74 |
| 2026-02-23 00:00 |
15:42:29.00 |
-13:32:22.9 |
HIP 76983 |
9.91 |
| 2026-02-23 12:00 |
15:42:40.55 |
-13:31:42.6 |
HIP 76983 |
7.23 |
| 2026-02-24 00:00 |
15:42:51.87 |
-13:31:01.2 |
HIP 76983 |
4.86 |