メタデータ
| 項目 |
値 |
| Designation |
C/1907 L2 (Daniel) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1907-09-04T11:05:22.588800Z |
| Orbit solution date (soln_date, UTC) |
2021-05-03T17:43:15Z |
| Obs used |
173 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1907-09-27.0000000 |
| e |
0.99876748 |
| q (au) |
0.512178 |
| a (au) |
415.554273 |
| i (deg) |
8.957993 |
| Ω (om, deg) |
144.267134 |
| ω (w, deg) |
294.470456 |
| M (ma, deg) |
0.002622 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
16:48:35.89 |
-13:46:20.4 |
HIP 82179 |
18.11 |
| 2026-06-01 12:00 |
16:48:34.97 |
-13:46:18.7 |
HIP 82179 |
17.90 |
| 2026-06-02 00:00 |
16:48:34.04 |
-13:46:17.0 |
HIP 82179 |
17.68 |
| 2026-06-02 12:00 |
16:48:33.12 |
-13:46:15.2 |
HIP 82179 |
17.46 |
| 2026-06-03 00:00 |
16:48:32.20 |
-13:46:13.5 |
HIP 82179 |
17.25 |
| 2026-06-03 12:00 |
16:48:31.27 |
-13:46:11.8 |
HIP 82179 |
17.03 |
| 2026-06-04 00:00 |
16:48:30.35 |
-13:46:10.2 |
HIP 82179 |
16.82 |
| 2026-06-04 12:00 |
16:48:29.43 |
-13:46:08.5 |
HIP 82179 |
16.60 |
| 2026-06-05 00:00 |
16:48:28.50 |
-13:46:06.9 |
HIP 82179 |
16.39 |
| 2026-06-05 12:00 |
16:48:27.58 |
-13:46:05.3 |
HIP 82179 |
16.17 |
| 2026-06-06 00:00 |
16:48:26.66 |
-13:46:03.6 |
HIP 82179 |
15.96 |
| 2026-06-06 12:00 |
16:48:25.73 |
-13:46:02.1 |
HIP 82179 |
15.74 |
| 2026-06-07 00:00 |
16:48:24.81 |
-13:46:00.5 |
HIP 82179 |
15.53 |
| 2026-06-07 12:00 |
16:48:23.89 |
-13:45:58.9 |
HIP 82179 |
15.31 |
| 2026-06-08 00:00 |
16:48:22.97 |
-13:45:57.4 |
HIP 82179 |
15.10 |
| 2026-06-08 12:00 |
16:48:22.05 |
-13:45:55.9 |
HIP 82179 |
14.89 |
| 2026-06-09 00:00 |
16:48:21.12 |
-13:45:54.4 |
HIP 82179 |
14.67 |
| 2026-06-09 12:00 |
16:48:20.20 |
-13:45:52.9 |
HIP 82179 |
14.46 |
| 2026-06-10 00:00 |
16:48:19.28 |
-13:45:51.5 |
HIP 82179 |
14.25 |
| 2026-06-10 12:00 |
16:48:18.36 |
-13:45:50.0 |
HIP 82179 |
14.04 |
| 2026-06-11 00:00 |
16:48:17.45 |
-13:45:48.6 |
HIP 82179 |
13.83 |
| 2026-06-11 12:00 |
16:48:16.53 |
-13:45:47.2 |
HIP 82179 |
13.62 |
| 2026-06-12 00:00 |
16:48:15.61 |
-13:45:45.8 |
HIP 82179 |
13.41 |
| 2026-06-12 12:00 |
16:48:14.70 |
-13:45:44.4 |
HIP 82179 |
13.20 |
| 2026-06-13 00:00 |
16:48:13.78 |
-13:45:43.1 |
HIP 82179 |
12.99 |
| 2026-06-13 12:00 |
16:48:12.87 |
-13:45:41.8 |
HIP 82179 |
12.78 |
| 2026-06-14 00:00 |
16:48:11.96 |
-13:45:40.5 |
HIP 82179 |
12.57 |
| 2026-06-14 12:00 |
16:48:11.05 |
-13:45:39.2 |
HIP 82179 |
12.37 |
| 2026-06-15 00:00 |
16:48:10.14 |
-13:45:37.9 |
HIP 82179 |
12.16 |
| 2026-06-15 12:00 |
16:48:09.23 |
-13:45:36.7 |
HIP 82179 |
11.96 |
| 2026-06-16 00:00 |
16:48:08.32 |
-13:45:35.4 |
HIP 82179 |
11.75 |
| 2026-06-16 12:00 |
16:48:07.42 |
-13:45:34.2 |
HIP 82179 |
11.55 |
| 2026-06-17 00:00 |
16:48:06.51 |
-13:45:33.0 |
HIP 82179 |
11.35 |
| 2026-06-17 12:00 |
16:48:05.61 |
-13:45:31.8 |
HIP 82179 |
11.15 |
| 2026-06-18 00:00 |
16:48:04.71 |
-13:45:30.7 |
HIP 82179 |
10.95 |
| 2026-06-18 12:00 |
16:48:03.81 |
-13:45:29.6 |
HIP 82179 |
10.75 |
| 2026-06-19 00:00 |
16:48:02.92 |
-13:45:28.5 |
HIP 82179 |
10.55 |
| 2026-06-19 12:00 |
16:48:02.02 |
-13:45:27.4 |
HIP 82179 |
10.35 |
| 2026-06-20 00:00 |
16:48:01.13 |
-13:45:26.3 |
HIP 82179 |
10.16 |
| 2026-06-20 12:00 |
16:48:00.24 |
-13:45:25.2 |
HIP 82179 |
9.96 |
| 2026-06-21 00:00 |
16:47:59.35 |
-13:45:24.2 |
HIP 82179 |
9.77 |
| 2026-06-21 12:00 |
16:47:58.47 |
-13:45:23.2 |
HIP 82179 |
9.58 |
| 2026-06-22 00:00 |
16:47:57.58 |
-13:45:22.2 |
HIP 82179 |
9.39 |