メタデータ
| 項目 |
値 |
| Designation |
C/1999 L3 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-01-04T21:48:00.221760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
340 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
15.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1999-12-24.0000000 |
| e |
0.97436453 |
| q (au) |
1.988918 |
| a (au) |
77.584594 |
| i (deg) |
166.099275 |
| Ω (om, deg) |
140.161317 |
| ω (w, deg) |
353.297874 |
| M (ma, deg) |
359.982825 |
等級
散乱 + 全体線形
$$
M_a = (6.988 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.988 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.905 |
| 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 |
| 1999-06-09 |
2000-01-04 |
+8.4713 |
-3.326 |
| 2000-01-05 |
2000-04-23 |
-5.4078 |
+1.574 |
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) |
| 2026-07-29 00:00 |
23:04:49.92 |
+00:58:57.4 |
HIP 114005 |
20.67 |
| 2026-07-29 12:00 |
23:04:47.92 |
+00:58:47.4 |
HIP 114005 |
21.00 |
| 2026-07-30 00:00 |
23:04:45.90 |
+00:58:37.4 |
HIP 114005 |
21.33 |
| 2026-07-30 12:00 |
23:04:43.87 |
+00:58:27.2 |
HIP 114005 |
21.68 |
| 2026-07-31 00:00 |
23:04:41.83 |
+00:58:17.0 |
HIP 114005 |
22.04 |
| 2026-07-31 12:00 |
23:04:39.78 |
+00:58:06.6 |
HIP 114005 |
22.41 |
| 2026-08-01 00:00 |
23:04:37.71 |
+00:57:56.1 |
HIP 114005 |
22.79 |
| 2026-08-01 12:00 |
23:04:35.63 |
+00:57:45.5 |
HIP 114005 |
23.18 |
| 2026-08-02 00:00 |
23:04:33.54 |
+00:57:34.7 |
HIP 114005 |
23.58 |
| 2026-08-02 12:00 |
23:04:31.44 |
+00:57:23.9 |
HIP 114005 |
23.99 |
| 2026-08-03 00:00 |
23:04:29.32 |
+00:57:13.0 |
HIP 114005 |
24.41 |
| 2026-08-03 12:00 |
23:04:27.19 |
+00:57:01.9 |
HIP 114005 |
24.83 |
| 2026-08-04 00:00 |
23:04:25.05 |
+00:56:50.8 |
HIP 114005 |
25.27 |
| 2026-08-04 12:00 |
23:04:22.90 |
+00:56:39.5 |
HIP 114005 |
25.71 |
| 2026-08-05 00:00 |
23:04:20.73 |
+00:56:28.1 |
HIP 114005 |
26.16 |
| 2026-08-05 12:00 |
23:04:18.56 |
+00:56:16.7 |
HIP 114005 |
26.62 |
| 2026-08-06 00:00 |
23:04:16.37 |
+00:56:05.1 |
HIP 114005 |
27.09 |
| 2026-08-06 12:00 |
23:04:14.17 |
+00:55:53.4 |
HIP 114005 |
27.56 |
| 2026-08-07 00:00 |
23:04:11.96 |
+00:55:41.6 |
HIP 114005 |
28.04 |
| 2026-08-07 12:00 |
23:04:09.74 |
+00:55:29.7 |
HIP 114005 |
28.53 |
| 2026-08-08 00:00 |
23:04:07.51 |
+00:55:17.7 |
HIP 114005 |
29.02 |
| 2026-08-08 12:00 |
23:04:05.26 |
+00:55:05.6 |
HIP 114005 |
29.52 |
| 2026-08-09 00:00 |
23:04:03.01 |
+00:54:53.4 |
HIP 114005 |
30.03 |
| 2026-08-09 12:00 |
23:04:00.75 |
+00:54:41.1 |
HIP 114005 |
30.54 |
| 2026-08-10 00:00 |
23:03:58.47 |
+00:54:28.7 |
HIP 114005 |
31.06 |
| 2026-08-10 12:00 |
23:03:56.19 |
+00:54:16.3 |
HIP 114005 |
31.59 |
| 2026-08-11 00:00 |
23:03:53.90 |
+00:54:03.7 |
HIP 114005 |
32.12 |
| 2026-08-11 12:00 |
23:03:51.59 |
+00:53:51.0 |
HIP 114005 |
32.66 |
| 2026-08-12 00:00 |
23:03:49.28 |
+00:53:38.2 |
HIP 114005 |
33.20 |
| 2026-08-12 12:00 |
23:03:46.96 |
+00:53:25.3 |
HIP 114005 |
33.75 |
| 2026-08-13 00:00 |
23:03:44.63 |
+00:53:12.3 |
HIP 113770 |
33.53 |
| 2026-08-13 12:00 |
23:03:42.29 |
+00:52:59.3 |
HIP 113770 |
33.01 |
| 2026-08-14 00:00 |
23:03:39.94 |
+00:52:46.1 |
HIP 113770 |
32.49 |
| 2026-08-14 12:00 |
23:03:37.58 |
+00:52:32.8 |
HIP 113770 |
31.96 |
| 2026-08-15 00:00 |
23:03:35.21 |
+00:52:19.5 |
HIP 113770 |
31.45 |
| 2026-08-15 12:00 |
23:03:32.84 |
+00:52:06.1 |
HIP 113770 |
30.93 |
| 2026-08-16 00:00 |
23:03:30.46 |
+00:51:52.5 |
HIP 113770 |
30.41 |
| 2026-08-16 12:00 |
23:03:28.07 |
+00:51:38.9 |
HIP 113770 |
29.90 |
| 2026-08-17 00:00 |
23:03:25.67 |
+00:51:25.2 |
HIP 113770 |
29.39 |
| 2026-08-17 12:00 |
23:03:23.26 |
+00:51:11.5 |
HIP 113770 |
28.88 |
| 2026-08-18 00:00 |
23:03:20.85 |
+00:50:57.6 |
HIP 113770 |
28.38 |
| 2026-08-18 12:00 |
23:03:18.43 |
+00:50:43.7 |
HIP 113770 |
27.88 |
| 2026-08-19 00:00 |
23:03:16.00 |
+00:50:29.6 |
HIP 113770 |
27.38 |