メタデータ
| 項目 |
値 |
| Designation |
144P/Kushida |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-01-25T19:11:47.238720Z |
| Orbit solution date (soln_date, UTC) |
2024-12-30T09:07:42Z |
| Obs used |
3111 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
18.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-08-12T00:16:24.096000Z |
| Discovery magnitude (MPC) |
21.40 V |
| Discovery observatory (MPC) |
A77 · Observatoire Chante-Perdrix, Dauban |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-01-18.0000000 |
| e |
0.63510624 |
| q (au) |
1.397336 |
| a (au) |
3.829432 |
| i (deg) |
3.930393 |
| Ω (om, deg) |
242.979419 |
| ω (w, deg) |
216.345483 |
| M (ma, deg) |
310.968153 |
等級
散乱 + 全体線形
$$
M_a = (12.854 + 4.742\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.854 |
| n |
4.742 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-06-22 |
2023-11-24 |
+5.1076 |
+0.335 |
| 2023-11-24 |
2024-01-25 |
+49.8144 |
-8.102 |
| 2024-01-26 |
2024-06-29 |
-7.8618 |
-1.021 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
17:17:11.07 |
-21:48:08.6 |
HIP 84491 |
11.43 |
| 2026-06-01 12:00 |
17:16:51.69 |
-21:47:40.5 |
HIP 84491 |
7.47 |
| 2026-06-02 00:00 |
17:16:32.28 |
-21:47:12.2 |
HIP 84491 |
4.67 |
| 2026-06-02 12:00 |
17:16:12.83 |
-21:46:43.9 |
HIP 84491 |
5.38 |
| 2026-06-03 00:00 |
17:15:53.35 |
-21:46:15.5 |
HIP 84491 |
8.80 |
| 2026-06-03 12:00 |
17:15:33.84 |
-21:45:46.9 |
HIP 84491 |
12.94 |
| 2026-06-04 00:00 |
17:15:14.30 |
-21:45:18.3 |
HIP 84491 |
17.29 |
| 2026-06-04 12:00 |
17:14:54.75 |
-21:44:49.5 |
HIP 84491 |
21.74 |
| 2026-06-05 00:00 |
17:14:35.17 |
-21:44:20.7 |
HIP 84491 |
26.23 |
| 2026-06-05 12:00 |
17:14:15.58 |
-21:43:51.7 |
HIP 84198 |
23.55 |
| 2026-06-06 00:00 |
17:13:55.97 |
-21:43:22.7 |
HIP 84198 |
19.10 |
| 2026-06-06 12:00 |
17:13:36.35 |
-21:42:53.6 |
HIP 84198 |
14.73 |
| 2026-06-07 00:00 |
17:13:16.73 |
-21:42:24.4 |
HIP 84198 |
10.55 |
| 2026-06-07 12:00 |
17:12:57.09 |
-21:41:55.1 |
HIP 84198 |
6.90 |
| 2026-06-08 00:00 |
17:12:37.46 |
-21:41:25.8 |
HIP 84198 |
5.09 |
| 2026-06-08 12:00 |
17:12:17.82 |
-21:40:56.4 |
HIP 84198 |
6.81 |
| 2026-06-09 00:00 |
17:11:58.19 |
-21:40:26.9 |
HIP 84135 |
7.12 |
| 2026-06-09 12:00 |
17:11:38.56 |
-21:39:57.3 |
HIP 84135 |
9.50 |
| 2026-06-10 00:00 |
17:11:18.94 |
-21:39:27.7 |
HIP 84135 |
13.11 |
| 2026-06-10 12:00 |
17:10:59.33 |
-21:38:58.0 |
HIP 84135 |
17.19 |
| 2026-06-11 00:00 |
17:10:39.74 |
-21:38:28.3 |
HIP 83969 |
14.60 |
| 2026-06-11 12:00 |
17:10:20.16 |
-21:37:58.5 |
HIP 83969 |
11.79 |
| 2026-06-12 00:00 |
17:10:00.60 |
-21:37:28.7 |
HIP 83969 |
10.33 |
| 2026-06-12 12:00 |
17:09:41.07 |
-21:36:58.9 |
HIP 83969 |
10.77 |
| 2026-06-13 00:00 |
17:09:21.56 |
-21:36:29.0 |
HIP 83969 |
12.92 |
| 2026-06-13 12:00 |
17:09:02.08 |
-21:35:59.0 |
HIP 83969 |
16.11 |
| 2026-06-14 00:00 |
17:08:42.63 |
-21:35:29.1 |
HIP 83969 |
19.83 |
| 2026-06-14 12:00 |
17:08:23.21 |
-21:34:59.1 |
HIP 83969 |
23.83 |
| 2026-06-15 00:00 |
17:08:03.84 |
-21:34:29.2 |
HIP 83684 |
26.05 |
| 2026-06-15 12:00 |
17:07:44.50 |
-21:33:59.2 |
HIP 83684 |
21.55 |
| 2026-06-16 00:00 |
17:07:25.21 |
-21:33:29.2 |
HIP 83684 |
17.07 |
| 2026-06-16 12:00 |
17:07:05.96 |
-21:32:59.2 |
HIP 83684 |
12.62 |
| 2026-06-17 00:00 |
17:06:46.77 |
-21:32:29.2 |
HIP 83684 |
8.25 |
| 2026-06-17 12:00 |
17:06:27.63 |
-21:31:59.2 |
HIP 83684 |
4.13 |
| 2026-06-18 00:00 |
17:06:08.54 |
-21:31:29.2 |
HIP 83684 |
2.50 |
| 2026-06-18 12:00 |
17:05:49.51 |
-21:30:59.2 |
HIP 83684 |
5.93 |
| 2026-06-19 00:00 |
17:05:30.54 |
-21:30:29.3 |
HIP 83684 |
10.17 |
| 2026-06-19 12:00 |
17:05:11.63 |
-21:29:59.3 |
HIP 83684 |
14.52 |
| 2026-06-20 00:00 |
17:04:52.79 |
-21:29:29.5 |
HIP 83482 |
17.07 |
| 2026-06-20 12:00 |
17:04:34.02 |
-21:28:59.6 |
HIP 83482 |
12.76 |
| 2026-06-21 00:00 |
17:04:15.32 |
-21:28:29.8 |
HIP 83482 |
8.54 |
| 2026-06-21 12:00 |
17:03:56.69 |
-21:28:00.0 |
HIP 83482 |
4.65 |
| 2026-06-22 00:00 |
17:03:38.14 |
-21:27:30.3 |
HIP 83482 |
2.88 |