C/1995 O1 (Hale-Bopp)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1995 O1 (Hale-Bopp) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1997-03-29T15:14:15.973440Z |
| Orbit solution date (soln_date, UTC) | 2022-08-01T01:56:46Z |
| Obs used | 66 |
| NEO | - |
| M1 | 4.800 |
| K1 | 4.000 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2022-09-15.0000000 |
| e | 0.99498100 |
| q (au) | 0.890538 |
| a (au) | 177.433384 |
| i (deg) | 89.287594 |
| Ω (om, deg) | 282.733421 |
| ω (w, deg) | 130.414667 |
| M (ma, deg) | 3.878386 |
等級
散乱 + 全体線形
$$ M_a = (-1.380 + 3.909\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | -1.380 |
| n | 3.909 |
| gf | 1.000 |
| gb | -0.775 |
| k | 0.992 |
| 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 |
|---|---|---|---|
| 1993-04-27 | 1995-08-14 | +22.3841 | -18.479 |
| 1995-08-14 | 1996-10-19 | +1.1205 | -0.683 |
| 1996-10-19 | 1996-11-12 | -13.5390 | +5.700 |
| 1996-11-12 | 1997-03-29 | +1.5786 | +0.131 |
| 1997-03-29 | 1997-10-13 | +1.1435 | -0.117 |
| 1997-10-13 | 2000-02-10 | -1.1481 | +1.410 |
| 2000-02-10 | 2013-08-13 | +6.3115 | -6.332 |
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) |
|---|---|---|---|---|
| 2026-05-12 00:00 | 22:56:31.44 | -84:02:50.2 | HIP 112859 | 15.22 |
| 2026-05-12 12:00 | 22:56:38.72 | -84:03:20.1 | HIP 112859 | 14.89 |
| 2026-05-13 00:00 | 22:56:45.86 | -84:03:50.2 | HIP 112859 | 14.58 |
| 2026-05-13 12:00 | 22:56:52.85 | -84:04:20.4 | HIP 112859 | 14.27 |
| 2026-05-14 00:00 | 22:56:59.69 | -84:04:50.7 | HIP 112859 | 13.97 |
| 2026-05-14 12:00 | 22:57:06.39 | -84:05:21.1 | HIP 112859 | 13.68 |
| 2026-05-15 00:00 | 22:57:12.94 | -84:05:51.6 | HIP 112859 | 13.40 |
| 2026-05-15 12:00 | 22:57:19.33 | -84:06:22.3 | HIP 112859 | 13.13 |
| 2026-05-16 00:00 | 22:57:25.58 | -84:06:53.0 | HIP 112859 | 12.87 |
| 2026-05-16 12:00 | 22:57:31.68 | -84:07:23.9 | HIP 112859 | 12.63 |
| 2026-05-17 00:00 | 22:57:37.62 | -84:07:54.9 | HIP 112859 | 12.40 |
| 2026-05-17 12:00 | 22:57:43.41 | -84:08:26.0 | HIP 112859 | 12.19 |
| 2026-05-18 00:00 | 22:57:49.05 | -84:08:57.2 | HIP 112859 | 11.99 |
| 2026-05-18 12:00 | 22:57:54.53 | -84:09:28.5 | HIP 112859 | 11.81 |
| 2026-05-19 00:00 | 22:57:59.85 | -84:10:00.0 | HIP 112859 | 11.65 |
| 2026-05-19 12:00 | 22:58:05.02 | -84:10:31.5 | HIP 112859 | 11.50 |
| 2026-05-20 00:00 | 22:58:10.02 | -84:11:03.1 | HIP 112859 | 11.38 |
| 2026-05-20 12:00 | 22:58:14.87 | -84:11:34.8 | HIP 112859 | 11.27 |
| 2026-05-21 00:00 | 22:58:19.55 | -84:12:06.6 | HIP 112859 | 11.18 |
| 2026-05-21 12:00 | 22:58:24.08 | -84:12:38.4 | HIP 112859 | 11.12 |
| 2026-05-22 00:00 | 22:58:28.44 | -84:13:10.4 | HIP 112859 | 11.08 |
| 2026-05-22 12:00 | 22:58:32.64 | -84:13:42.5 | HIP 112859 | 11.06 |
| 2026-05-23 00:00 | 22:58:36.67 | -84:14:14.6 | HIP 112859 | 11.06 |
| 2026-05-23 12:00 | 22:58:40.54 | -84:14:46.8 | HIP 112859 | 11.08 |
| 2026-05-24 00:00 | 22:58:44.24 | -84:15:19.1 | HIP 112859 | 11.13 |
| 2026-05-24 12:00 | 22:58:47.77 | -84:15:51.5 | HIP 112859 | 11.20 |
| 2026-05-25 00:00 | 22:58:51.14 | -84:16:23.9 | HIP 112859 | 11.29 |
| 2026-05-25 12:00 | 22:58:54.34 | -84:16:56.4 | HIP 112859 | 11.40 |
| 2026-05-26 00:00 | 22:58:57.37 | -84:17:29.0 | HIP 112859 | 11.53 |
| 2026-05-26 12:00 | 22:59:00.23 | -84:18:01.7 | HIP 112859 | 11.68 |
| 2026-05-27 00:00 | 22:59:02.91 | -84:18:34.4 | HIP 112859 | 11.85 |
| 2026-05-27 12:00 | 22:59:05.43 | -84:19:07.2 | HIP 112859 | 12.04 |
| 2026-05-28 00:00 | 22:59:07.77 | -84:19:40.0 | HIP 112859 | 12.25 |
| 2026-05-28 12:00 | 22:59:09.93 | -84:20:12.9 | HIP 112859 | 12.47 |
| 2026-05-29 00:00 | 22:59:11.93 | -84:20:45.9 | HIP 112859 | 12.72 |
| 2026-05-29 12:00 | 22:59:13.74 | -84:21:18.9 | HIP 112859 | 12.97 |
| 2026-05-30 00:00 | 22:59:15.38 | -84:21:52.0 | HIP 112859 | 13.24 |
| 2026-05-30 12:00 | 22:59:16.84 | -84:22:25.1 | HIP 112859 | 13.53 |
| 2026-05-31 00:00 | 22:59:18.12 | -84:22:58.2 | HIP 112859 | 13.82 |
| 2026-05-31 12:00 | 22:59:19.22 | -84:23:31.4 | HIP 112859 | 14.13 |
| 2026-06-01 00:00 | 22:59:20.14 | -84:24:04.7 | HIP 112859 | 14.45 |
| 2026-06-01 12:00 | 22:59:20.88 | -84:24:38.0 | HIP 112859 | 14.78 |
| 2026-06-02 00:00 | 22:59:21.43 | -84:25:11.3 | HIP 112859 | 15.12 |