C/2000 K2 (LINEAR)
メタデータ
| 項目 |
値 |
| Designation |
C/2000 K2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-10-11T08:50:10.268160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
315 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2001-01-24.0000000 |
| e |
0.99533458 |
| q (au) |
2.437066 |
| a (au) |
522.368250 |
| i (deg) |
25.633558 |
| Ω (om, deg) |
195.261038 |
| ω (w, deg) |
106.826472 |
| M (ma, deg) |
0.008638 |
等級
散乱 + 全体線形
$$
M_a = (11.118 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.118 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.947 |
| 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 |
| 2000-05-04 |
2000-10-07 |
+29.0488 |
-11.898 |
| 2000-10-14 |
2003-01-16 |
+4.6075 |
-3.437 |
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) |
| 2026-02-03 00:00 |
06:14:48.21 |
-02:17:17.5 |
HIP 29740 |
15.82 |
| 2026-02-03 12:00 |
06:14:46.30 |
-02:17:05.7 |
HIP 29740 |
16.34 |
| 2026-02-04 00:00 |
06:14:44.41 |
-02:16:53.9 |
HIP 29740 |
16.85 |
| 2026-02-04 12:00 |
06:14:42.54 |
-02:16:42.0 |
HIP 29551 |
16.73 |
| 2026-02-05 00:00 |
06:14:40.68 |
-02:16:29.9 |
HIP 29551 |
16.26 |
| 2026-02-05 12:00 |
06:14:38.84 |
-02:16:17.8 |
HIP 29551 |
15.78 |
| 2026-02-06 00:00 |
06:14:37.02 |
-02:16:05.5 |
HIP 29551 |
15.31 |
| 2026-02-06 12:00 |
06:14:35.21 |
-02:15:53.2 |
HIP 29551 |
14.85 |
| 2026-02-07 00:00 |
06:14:33.41 |
-02:15:40.7 |
HIP 29551 |
14.40 |
| 2026-02-07 12:00 |
06:14:31.64 |
-02:15:28.1 |
HIP 29551 |
13.95 |
| 2026-02-08 00:00 |
06:14:29.88 |
-02:15:15.5 |
HIP 29551 |
13.50 |
| 2026-02-08 12:00 |
06:14:28.14 |
-02:15:02.8 |
HIP 29551 |
13.07 |
| 2026-02-09 00:00 |
06:14:26.41 |
-02:14:49.9 |
HIP 29551 |
12.64 |
| 2026-02-09 12:00 |
06:14:24.71 |
-02:14:37.0 |
HIP 29551 |
12.23 |
| 2026-02-10 00:00 |
06:14:23.02 |
-02:14:23.9 |
HIP 29551 |
11.82 |
| 2026-02-10 12:00 |
06:14:21.34 |
-02:14:10.8 |
HIP 29551 |
11.42 |
| 2026-02-11 00:00 |
06:14:19.69 |
-02:13:57.6 |
HIP 29551 |
11.03 |
| 2026-02-11 12:00 |
06:14:18.05 |
-02:13:44.3 |
HIP 29551 |
10.65 |
| 2026-02-12 00:00 |
06:14:16.43 |
-02:13:30.9 |
HIP 29551 |
10.28 |
| 2026-02-12 12:00 |
06:14:14.83 |
-02:13:17.4 |
HIP 29551 |
9.93 |
| 2026-02-13 00:00 |
06:14:13.25 |
-02:13:03.9 |
HIP 29551 |
9.59 |
| 2026-02-13 12:00 |
06:14:11.69 |
-02:12:50.2 |
HIP 29551 |
9.27 |
| 2026-02-14 00:00 |
06:14:10.14 |
-02:12:36.5 |
HIP 29551 |
8.96 |
| 2026-02-14 12:00 |
06:14:08.62 |
-02:12:22.7 |
HIP 29551 |
8.67 |
| 2026-02-15 00:00 |
06:14:07.11 |
-02:12:08.8 |
HIP 29551 |
8.39 |
| 2026-02-15 12:00 |
06:14:05.62 |
-02:11:54.8 |
HIP 29551 |
8.14 |
| 2026-02-16 00:00 |
06:14:04.15 |
-02:11:40.7 |
HIP 29551 |
7.91 |
| 2026-02-16 12:00 |
06:14:02.70 |
-02:11:26.6 |
HIP 29551 |
7.69 |
| 2026-02-17 00:00 |
06:14:01.27 |
-02:11:12.4 |
HIP 29551 |
7.51 |
| 2026-02-17 12:00 |
06:13:59.86 |
-02:10:58.1 |
HIP 29551 |
7.35 |
| 2026-02-18 00:00 |
06:13:58.47 |
-02:10:43.7 |
HIP 29551 |
7.21 |
| 2026-02-18 12:00 |
06:13:57.10 |
-02:10:29.3 |
HIP 29551 |
7.10 |
| 2026-02-19 00:00 |
06:13:55.74 |
-02:10:14.8 |
HIP 29551 |
7.02 |
| 2026-02-19 12:00 |
06:13:54.41 |
-02:10:00.2 |
HIP 29551 |
6.97 |
| 2026-02-20 00:00 |
06:13:53.10 |
-02:09:45.5 |
HIP 29551 |
6.94 |
| 2026-02-20 12:00 |
06:13:51.81 |
-02:09:30.8 |
HIP 29551 |
6.95 |
| 2026-02-21 00:00 |
06:13:50.54 |
-02:09:16.0 |
HIP 29551 |
6.98 |
| 2026-02-21 12:00 |
06:13:49.28 |
-02:09:01.2 |
HIP 29551 |
7.04 |
| 2026-02-22 00:00 |
06:13:48.05 |
-02:08:46.3 |
HIP 29551 |
7.12 |
| 2026-02-22 12:00 |
06:13:46.84 |
-02:08:31.3 |
HIP 29551 |
7.22 |
| 2026-02-23 00:00 |
06:13:45.65 |
-02:08:16.2 |
HIP 29551 |
7.35 |
| 2026-02-23 12:00 |
06:13:44.48 |
-02:08:01.2 |
HIP 29551 |
7.50 |
| 2026-02-24 00:00 |
06:13:43.33 |
-02:07:46.0 |
HIP 29551 |
7.67 |