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 |
-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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
22:35:21.14 |
-08:35:33.6 |
HIP 111451 |
9.76 |
| 2026-05-12 12:00 |
22:35:21.74 |
-08:35:28.3 |
HIP 111451 |
9.92 |
| 2026-05-13 00:00 |
22:35:22.33 |
-08:35:23.0 |
HIP 111451 |
10.08 |
| 2026-05-13 12:00 |
22:35:22.89 |
-08:35:17.9 |
HIP 111451 |
10.23 |
| 2026-05-14 00:00 |
22:35:23.44 |
-08:35:12.9 |
HIP 111451 |
10.37 |
| 2026-05-14 12:00 |
22:35:23.97 |
-08:35:08.1 |
HIP 111451 |
10.51 |
| 2026-05-15 00:00 |
22:35:24.48 |
-08:35:03.3 |
HIP 111451 |
10.65 |
| 2026-05-15 12:00 |
22:35:24.96 |
-08:34:58.7 |
HIP 111451 |
10.78 |
| 2026-05-16 00:00 |
22:35:25.43 |
-08:34:54.2 |
HIP 111451 |
10.90 |
| 2026-05-16 12:00 |
22:35:25.88 |
-08:34:49.8 |
HIP 111451 |
11.02 |
| 2026-05-17 00:00 |
22:35:26.30 |
-08:34:45.5 |
HIP 111451 |
11.14 |
| 2026-05-17 12:00 |
22:35:26.71 |
-08:34:41.3 |
HIP 111451 |
11.25 |
| 2026-05-18 00:00 |
22:35:27.10 |
-08:34:37.3 |
HIP 111479 |
11.35 |
| 2026-05-18 12:00 |
22:35:27.46 |
-08:34:33.4 |
HIP 111479 |
11.32 |
| 2026-05-19 00:00 |
22:35:27.81 |
-08:34:29.5 |
HIP 111479 |
11.29 |
| 2026-05-19 12:00 |
22:35:28.13 |
-08:34:25.9 |
HIP 111479 |
11.26 |
| 2026-05-20 00:00 |
22:35:28.44 |
-08:34:22.3 |
HIP 111479 |
11.23 |
| 2026-05-20 12:00 |
22:35:28.72 |
-08:34:18.9 |
HIP 111479 |
11.20 |
| 2026-05-21 00:00 |
22:35:28.99 |
-08:34:15.5 |
HIP 111479 |
11.18 |
| 2026-05-21 12:00 |
22:35:29.23 |
-08:34:12.3 |
HIP 111479 |
11.15 |
| 2026-05-22 00:00 |
22:35:29.46 |
-08:34:09.2 |
HIP 111479 |
11.13 |
| 2026-05-22 12:00 |
22:35:29.66 |
-08:34:06.3 |
HIP 111479 |
11.10 |
| 2026-05-23 00:00 |
22:35:29.84 |
-08:34:03.4 |
HIP 111479 |
11.08 |
| 2026-05-23 12:00 |
22:35:30.00 |
-08:34:00.7 |
HIP 111479 |
11.05 |
| 2026-05-24 00:00 |
22:35:30.15 |
-08:33:58.1 |
HIP 111479 |
11.03 |
| 2026-05-24 12:00 |
22:35:30.27 |
-08:33:55.6 |
HIP 111479 |
11.00 |
| 2026-05-25 00:00 |
22:35:30.37 |
-08:33:53.3 |
HIP 111479 |
10.98 |
| 2026-05-25 12:00 |
22:35:30.45 |
-08:33:51.0 |
HIP 111479 |
10.95 |
| 2026-05-26 00:00 |
22:35:30.51 |
-08:33:48.9 |
HIP 111479 |
10.93 |
| 2026-05-26 12:00 |
22:35:30.55 |
-08:33:46.9 |
HIP 111479 |
10.90 |
| 2026-05-27 00:00 |
22:35:30.57 |
-08:33:45.0 |
HIP 111479 |
10.87 |
| 2026-05-27 12:00 |
22:35:30.57 |
-08:33:43.3 |
HIP 111479 |
10.85 |
| 2026-05-28 00:00 |
22:35:30.55 |
-08:33:41.6 |
HIP 111479 |
10.82 |
| 2026-05-28 12:00 |
22:35:30.50 |
-08:33:40.1 |
HIP 111479 |
10.79 |
| 2026-05-29 00:00 |
22:35:30.44 |
-08:33:38.7 |
HIP 111479 |
10.77 |
| 2026-05-29 12:00 |
22:35:30.36 |
-08:33:37.4 |
HIP 111479 |
10.74 |
| 2026-05-30 00:00 |
22:35:30.25 |
-08:33:36.3 |
HIP 111479 |
10.71 |
| 2026-05-30 12:00 |
22:35:30.13 |
-08:33:35.2 |
HIP 111479 |
10.68 |
| 2026-05-31 00:00 |
22:35:29.99 |
-08:33:34.3 |
HIP 111479 |
10.65 |
| 2026-05-31 12:00 |
22:35:29.82 |
-08:33:33.5 |
HIP 111479 |
10.62 |
| 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 |