メタデータ
| 項目 |
値 |
| Designation |
440P/Kobayashi |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-03-26T11:34:50.255040Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:22Z |
| Obs used |
829 |
| NEO |
- |
| M1 |
7.400 |
| K1 |
32.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-11-01.0000000 |
| e |
0.76109197 |
| q (au) |
2.046559 |
| a (au) |
8.566304 |
| i (deg) |
12.379964 |
| Ω (om, deg) |
329.032199 |
| ω (w, deg) |
183.293142 |
| M (ma, deg) |
253.762760 |
等級
散乱 + 全体線形
$$
M_a = (12.175 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.175 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 2021-12-08 |
2022-03-26 |
+29.4009 |
-9.339 |
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 |
20:33:45.05 |
-25:27:53.5 |
HIP 101577 |
19.32 |
| 2026-06-01 12:00 |
20:33:39.75 |
-25:28:22.2 |
HIP 101577 |
20.50 |
| 2026-06-02 00:00 |
20:33:34.35 |
-25:28:51.1 |
HIP 101577 |
21.71 |
| 2026-06-02 12:00 |
20:33:28.84 |
-25:29:20.2 |
HIP 101577 |
22.96 |
| 2026-06-03 00:00 |
20:33:23.24 |
-25:29:49.5 |
HIP 101360 |
23.66 |
| 2026-06-03 12:00 |
20:33:17.54 |
-25:30:19.0 |
HIP 101360 |
22.64 |
| 2026-06-04 00:00 |
20:33:11.75 |
-25:30:48.8 |
HIP 101360 |
21.64 |
| 2026-06-04 12:00 |
20:33:05.85 |
-25:31:18.8 |
HIP 101360 |
20.68 |
| 2026-06-05 00:00 |
20:32:59.86 |
-25:31:49.0 |
HIP 101360 |
19.77 |
| 2026-06-05 12:00 |
20:32:53.77 |
-25:32:19.4 |
HIP 101360 |
18.91 |
| 2026-06-06 00:00 |
20:32:47.59 |
-25:32:50.0 |
HIP 101360 |
18.12 |
| 2026-06-06 12:00 |
20:32:41.31 |
-25:33:20.7 |
HIP 101360 |
17.42 |
| 2026-06-07 00:00 |
20:32:34.94 |
-25:33:51.7 |
HIP 101360 |
16.82 |
| 2026-06-07 12:00 |
20:32:28.47 |
-25:34:22.9 |
HIP 101360 |
16.34 |
| 2026-06-08 00:00 |
20:32:21.91 |
-25:34:54.3 |
HIP 101360 |
15.99 |
| 2026-06-08 12:00 |
20:32:15.26 |
-25:35:25.8 |
HIP 101360 |
15.80 |
| 2026-06-09 00:00 |
20:32:08.51 |
-25:35:57.5 |
HIP 101360 |
15.77 |
| 2026-06-09 12:00 |
20:32:01.67 |
-25:36:29.4 |
HIP 101360 |
15.91 |
| 2026-06-10 00:00 |
20:31:54.74 |
-25:37:01.5 |
HIP 101360 |
16.22 |
| 2026-06-10 12:00 |
20:31:47.72 |
-25:37:33.7 |
HIP 101360 |
16.71 |
| 2026-06-11 00:00 |
20:31:40.60 |
-25:38:06.1 |
HIP 101360 |
17.35 |
| 2026-06-11 12:00 |
20:31:33.40 |
-25:38:38.6 |
HIP 101360 |
18.14 |
| 2026-06-12 00:00 |
20:31:26.11 |
-25:39:11.3 |
HIP 101360 |
19.06 |
| 2026-06-12 12:00 |
20:31:18.73 |
-25:39:44.2 |
HIP 101360 |
20.11 |
| 2026-06-13 00:00 |
20:31:11.26 |
-25:40:17.1 |
HIP 101122 |
18.79 |
| 2026-06-13 12:00 |
20:31:03.70 |
-25:40:50.3 |
HIP 101122 |
17.00 |
| 2026-06-14 00:00 |
20:30:56.06 |
-25:41:23.5 |
HIP 101122 |
15.20 |
| 2026-06-14 12:00 |
20:30:48.33 |
-25:41:56.9 |
HIP 101122 |
13.38 |
| 2026-06-15 00:00 |
20:30:40.52 |
-25:42:30.4 |
HIP 101122 |
11.54 |
| 2026-06-15 12:00 |
20:30:32.62 |
-25:43:04.0 |
HIP 101122 |
9.69 |
| 2026-06-16 00:00 |
20:30:24.64 |
-25:43:37.8 |
HIP 101122 |
7.82 |
| 2026-06-16 12:00 |
20:30:16.58 |
-25:44:11.6 |
HIP 101122 |
5.95 |
| 2026-06-17 00:00 |
20:30:08.43 |
-25:44:45.5 |
HIP 101122 |
4.09 |
| 2026-06-17 12:00 |
20:30:00.21 |
-25:45:19.6 |
HIP 101122 |
2.33 |
| 2026-06-18 00:00 |
20:29:51.90 |
-25:45:53.7 |
HIP 101122 |
1.25 |
| 2026-06-18 12:00 |
20:29:43.52 |
-25:46:27.9 |
HIP 101122 |
2.33 |
| 2026-06-19 00:00 |
20:29:35.06 |
-25:47:02.2 |
HIP 101122 |
4.15 |
| 2026-06-19 12:00 |
20:29:26.52 |
-25:47:36.6 |
HIP 101122 |
6.09 |
| 2026-06-20 00:00 |
20:29:17.90 |
-25:48:11.0 |
HIP 101122 |
8.09 |
| 2026-06-20 12:00 |
20:29:09.21 |
-25:48:45.5 |
HIP 101122 |
10.11 |
| 2026-06-21 00:00 |
20:29:00.44 |
-25:49:20.1 |
HIP 101122 |
12.15 |
| 2026-06-21 12:00 |
20:28:51.61 |
-25:49:54.7 |
HIP 101122 |
14.21 |
| 2026-06-22 00:00 |
20:28:42.69 |
-25:50:29.3 |
HIP 101122 |
16.29 |