メタデータ
| 項目 |
値 |
| Designation |
C/2025 K3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2028-12-14T01:47:17.499840Z |
| Orbit solution date (soln_date, UTC) |
2026-07-21T13:12:10Z |
| Obs used |
87 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
8.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-05-23T12:57:29.433600Z |
| Discovery magnitude (MPC) |
22.04 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) |
2025-11-26.0000000 |
| e |
1.00147634 |
| q (au) |
3.469824 |
| a (au) |
-2350.281381 |
| i (deg) |
104.935197 |
| Ω (om, deg) |
350.633870 |
| ω (w, deg) |
188.597056 |
| M (ma, deg) |
-0.009637 |
等級
散乱 + 全体線形
$$
M_a = (7.606 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.606 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.960 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
17:01:57.97 |
+57:01:07.2 |
HIP 83265 |
9.08 |
| 2026-07-29 12:00 |
17:01:30.44 |
+56:58:27.1 |
HIP 83265 |
9.01 |
| 2026-07-30 00:00 |
17:01:03.15 |
+56:55:45.4 |
HIP 83265 |
11.08 |
| 2026-07-30 12:00 |
17:00:36.09 |
+56:53:02.0 |
HIP 83265 |
14.38 |
| 2026-07-31 00:00 |
17:00:09.26 |
+56:50:17.1 |
HIP 83138 |
11.10 |
| 2026-07-31 12:00 |
16:59:42.66 |
+56:47:30.5 |
HIP 83138 |
6.84 |
| 2026-08-01 00:00 |
16:59:16.30 |
+56:44:42.4 |
HIP 83138 |
3.47 |
| 2026-08-01 12:00 |
16:58:50.17 |
+56:41:52.7 |
HIP 83138 |
4.35 |
| 2026-08-02 00:00 |
16:58:24.28 |
+56:39:01.5 |
HIP 83138 |
8.19 |
| 2026-08-02 12:00 |
16:57:58.63 |
+56:36:08.8 |
HIP 83138 |
12.51 |
| 2026-08-03 00:00 |
16:57:33.22 |
+56:33:14.6 |
HIP 83138 |
16.95 |
| 2026-08-03 12:00 |
16:57:08.05 |
+56:30:19.0 |
HIP 83138 |
21.41 |
| 2026-08-04 00:00 |
16:56:43.13 |
+56:27:21.9 |
HIP 82759 |
22.58 |
| 2026-08-04 12:00 |
16:56:18.44 |
+56:24:23.3 |
HIP 82759 |
22.92 |
| 2026-08-05 00:00 |
16:55:54.00 |
+56:21:23.4 |
HIP 82759 |
24.14 |
| 2026-08-05 12:00 |
16:55:29.81 |
+56:18:22.0 |
HIP 82759 |
26.11 |
| 2026-08-06 00:00 |
16:55:05.86 |
+56:15:19.3 |
HIP 82575 |
24.35 |
| 2026-08-06 12:00 |
16:54:42.16 |
+56:12:15.2 |
HIP 82575 |
19.86 |
| 2026-08-07 00:00 |
16:54:18.70 |
+56:09:09.8 |
HIP 82575 |
15.39 |
| 2026-08-07 12:00 |
16:53:55.50 |
+56:06:03.1 |
HIP 82575 |
10.95 |
| 2026-08-08 00:00 |
16:53:32.54 |
+56:02:55.1 |
HIP 82575 |
6.58 |
| 2026-08-08 12:00 |
16:53:09.84 |
+55:59:45.8 |
HIP 82575 |
2.66 |
| 2026-08-09 00:00 |
16:52:47.38 |
+55:56:35.3 |
HIP 82575 |
3.30 |
| 2026-08-09 12:00 |
16:52:25.18 |
+55:53:23.5 |
HIP 82575 |
7.39 |
| 2026-08-10 00:00 |
16:52:03.23 |
+55:50:10.5 |
HIP 82575 |
11.75 |
| 2026-08-10 12:00 |
16:51:41.54 |
+55:46:56.4 |
HIP 82575 |
16.16 |
| 2026-08-11 00:00 |
16:51:20.10 |
+55:43:41.1 |
HIP 82575 |
20.58 |
| 2026-08-11 12:00 |
16:50:58.91 |
+55:40:24.6 |
HIP 82575 |
25.00 |
| 2026-08-12 00:00 |
16:50:37.98 |
+55:37:07.0 |
HIP 82255 |
23.25 |
| 2026-08-12 12:00 |
16:50:17.30 |
+55:33:48.3 |
HIP 82255 |
18.97 |
| 2026-08-13 00:00 |
16:49:56.88 |
+55:30:28.6 |
HIP 82255 |
14.78 |
| 2026-08-13 12:00 |
16:49:36.71 |
+55:27:07.8 |
HIP 82255 |
10.79 |
| 2026-08-14 00:00 |
16:49:16.80 |
+55:23:46.0 |
HIP 82255 |
7.31 |
| 2026-08-14 12:00 |
16:48:57.15 |
+55:20:23.1 |
HIP 82255 |
5.43 |
| 2026-08-15 00:00 |
16:48:37.75 |
+55:16:59.3 |
HIP 82255 |
6.64 |
| 2026-08-15 12:00 |
16:48:18.61 |
+55:13:34.5 |
HIP 82268 |
6.29 |
| 2026-08-16 00:00 |
16:47:59.73 |
+55:10:08.8 |
HIP 82268 |
5.68 |
| 2026-08-16 12:00 |
16:47:41.10 |
+55:06:42.2 |
HIP 82268 |
7.91 |
| 2026-08-17 00:00 |
16:47:22.73 |
+55:03:14.7 |
HIP 82268 |
11.42 |
| 2026-08-17 12:00 |
16:47:04.61 |
+54:59:46.3 |
HIP 82268 |
15.34 |
| 2026-08-18 00:00 |
16:46:46.75 |
+54:56:17.0 |
HIP 82268 |
19.42 |
| 2026-08-18 12:00 |
16:46:29.15 |
+54:52:46.9 |
HIP 81947 |
18.56 |
| 2026-08-19 00:00 |
16:46:11.80 |
+54:49:16.0 |
HIP 81947 |
16.96 |