メタデータ
| 項目 |
値 |
| Designation |
C/2001 X1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-01-08T02:12:26.190720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:11Z |
| Obs used |
203 |
| NEO |
- |
| M1 |
14.000 |
| 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) |
2002-01-06.0000000 |
| e |
0.99704180 |
| q (au) |
1.697938 |
| a (au) |
573.976425 |
| i (deg) |
115.626976 |
| Ω (om, deg) |
336.070632 |
| ω (w, deg) |
202.201070 |
| M (ma, deg) |
359.999850 |
等級
散乱 + 全体線形
$$
M_a = (11.612 + 4.130\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.612 |
| n |
4.130 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
22:35:29.63 |
-08:33:32.9 |
HIP 111479 |
10.59 |
| 2026-06-01 12:00 |
22:35:29.43 |
-08:33:32.3 |
HIP 111479 |
10.56 |
| 2026-06-02 00:00 |
22:35:29.20 |
-08:33:31.9 |
HIP 111479 |
10.53 |
| 2026-06-02 12:00 |
22:35:28.95 |
-08:33:31.6 |
HIP 111479 |
10.50 |
| 2026-06-03 00:00 |
22:35:28.69 |
-08:33:31.4 |
HIP 111479 |
10.47 |
| 2026-06-03 12:00 |
22:35:28.40 |
-08:33:31.3 |
HIP 111479 |
10.44 |
| 2026-06-04 00:00 |
22:35:28.09 |
-08:33:31.4 |
HIP 111479 |
10.41 |
| 2026-06-04 12:00 |
22:35:27.76 |
-08:33:31.5 |
HIP 111479 |
10.38 |
| 2026-06-05 00:00 |
22:35:27.41 |
-08:33:31.8 |
HIP 111479 |
10.36 |
| 2026-06-05 12:00 |
22:35:27.04 |
-08:33:32.2 |
HIP 111479 |
10.33 |
| 2026-06-06 00:00 |
22:35:26.65 |
-08:33:32.8 |
HIP 111479 |
10.30 |
| 2026-06-06 12:00 |
22:35:26.24 |
-08:33:33.4 |
HIP 111479 |
10.27 |
| 2026-06-07 00:00 |
22:35:25.81 |
-08:33:34.2 |
HIP 111479 |
10.25 |
| 2026-06-07 12:00 |
22:35:25.36 |
-08:33:35.1 |
HIP 111479 |
10.23 |
| 2026-06-08 00:00 |
22:35:24.89 |
-08:33:36.1 |
HIP 111479 |
10.20 |
| 2026-06-08 12:00 |
22:35:24.39 |
-08:33:37.3 |
HIP 111479 |
10.18 |
| 2026-06-09 00:00 |
22:35:23.88 |
-08:33:38.5 |
HIP 111479 |
10.16 |
| 2026-06-09 12:00 |
22:35:23.35 |
-08:33:39.9 |
HIP 111479 |
10.15 |
| 2026-06-10 00:00 |
22:35:22.79 |
-08:33:41.4 |
HIP 111479 |
10.13 |
| 2026-06-10 12:00 |
22:35:22.22 |
-08:33:43.0 |
HIP 111479 |
10.12 |
| 2026-06-11 00:00 |
22:35:21.63 |
-08:33:44.8 |
HIP 111479 |
10.11 |
| 2026-06-11 12:00 |
22:35:21.01 |
-08:33:46.6 |
HIP 111451 |
10.08 |
| 2026-06-12 00:00 |
22:35:20.38 |
-08:33:48.6 |
HIP 111451 |
9.92 |
| 2026-06-12 12:00 |
22:35:19.72 |
-08:33:50.7 |
HIP 111451 |
9.76 |
| 2026-06-13 00:00 |
22:35:19.05 |
-08:33:52.9 |
HIP 111451 |
9.59 |
| 2026-06-13 12:00 |
22:35:18.35 |
-08:33:55.3 |
HIP 111451 |
9.41 |
| 2026-06-14 00:00 |
22:35:17.63 |
-08:33:57.8 |
HIP 111451 |
9.23 |
| 2026-06-14 12:00 |
22:35:16.90 |
-08:34:00.3 |
HIP 111451 |
9.04 |
| 2026-06-15 00:00 |
22:35:16.14 |
-08:34:03.0 |
HIP 111451 |
8.85 |
| 2026-06-15 12:00 |
22:35:15.37 |
-08:34:05.9 |
HIP 111451 |
8.65 |
| 2026-06-16 00:00 |
22:35:14.57 |
-08:34:08.8 |
HIP 111451 |
8.45 |
| 2026-06-16 12:00 |
22:35:13.75 |
-08:34:11.9 |
HIP 111451 |
8.24 |
| 2026-06-17 00:00 |
22:35:12.92 |
-08:34:15.0 |
HIP 111451 |
8.03 |
| 2026-06-17 12:00 |
22:35:12.06 |
-08:34:18.3 |
HIP 111451 |
7.81 |
| 2026-06-18 00:00 |
22:35:11.18 |
-08:34:21.7 |
HIP 111451 |
7.59 |
| 2026-06-18 12:00 |
22:35:10.29 |
-08:34:25.3 |
HIP 111451 |
7.36 |
| 2026-06-19 00:00 |
22:35:09.37 |
-08:34:28.9 |
HIP 111451 |
7.12 |
| 2026-06-19 12:00 |
22:35:08.44 |
-08:34:32.7 |
HIP 111451 |
6.88 |
| 2026-06-20 00:00 |
22:35:07.48 |
-08:34:36.5 |
HIP 111451 |
6.64 |
| 2026-06-20 12:00 |
22:35:06.51 |
-08:34:40.5 |
HIP 111451 |
6.39 |
| 2026-06-21 00:00 |
22:35:05.52 |
-08:34:44.6 |
HIP 111451 |
6.14 |
| 2026-06-21 12:00 |
22:35:04.51 |
-08:34:48.9 |
HIP 111451 |
5.88 |
| 2026-06-22 00:00 |
22:35:03.47 |
-08:34:53.2 |
HIP 111451 |
5.61 |