C/1982 M1 (Austin)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1982 M1 (Austin) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1982-08-24T17:30:18.077760Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:29Z |
| Obs used | 290 |
| NEO | - |
| M1 | 9.000 |
| 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) | 1982-09-05.0000000 |
| e | 0.99939617 |
| q (au) | 0.647812 |
| a (au) | 1072.840846 |
| i (deg) | 84.494983 |
| Ω (om, deg) | 326.262542 |
| ω (w, deg) | 33.822836 |
| M (ma, deg) | 0.000316 |
等級
散乱 + 全体線形
$$ M_a = (7.940 + 3.398\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 7.940 |
| n | 3.398 |
| gf | 0.800 |
| gb | -0.593 |
| k | 0.800 |
| δ90 | 1.000 |
| 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 |
|---|---|---|---|
| 1982-06-18 | 1982-07-10 | +7.1796 | -0.282 |
| 1982-07-10 | 1982-08-06 | -6.0673 | -0.023 |
| 1982-08-06 | 1982-08-24 | +9.1400 | +2.618 |
| 1982-08-24 | 1982-09-21 | -3.7033 | -0.749 |
| 1982-09-21 | 1982-11-21 | +3.7455 | -0.223 |
| 1982-11-21 | 1983-04-02 | +12.0937 | -2.471 |
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) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 09:28:41.61 | -09:03:10.1 | HIP 46450 | 9.51 |
| 2026-06-01 12:00 | 09:28:42.17 | -09:03:03.3 | HIP 46450 | 9.67 |
| 2026-06-02 00:00 | 09:28:42.74 | -09:02:56.7 | HIP 46450 | 9.83 |
| 2026-06-02 12:00 | 09:28:43.32 | -09:02:50.2 | HIP 46450 | 9.99 |
| 2026-06-03 00:00 | 09:28:43.91 | -09:02:43.7 | HIP 46450 | 10.15 |
| 2026-06-03 12:00 | 09:28:44.52 | -09:02:37.4 | HIP 46450 | 10.31 |
| 2026-06-04 00:00 | 09:28:45.14 | -09:02:31.1 | HIP 46450 | 10.47 |
| 2026-06-04 12:00 | 09:28:45.77 | -09:02:25.0 | HIP 46450 | 10.64 |
| 2026-06-05 00:00 | 09:28:46.42 | -09:02:18.9 | HIP 46450 | 10.80 |
| 2026-06-05 12:00 | 09:28:47.07 | -09:02:12.9 | HIP 46450 | 10.97 |
| 2026-06-06 00:00 | 09:28:47.74 | -09:02:07.0 | HIP 46450 | 11.13 |
| 2026-06-06 12:00 | 09:28:48.42 | -09:02:01.2 | HIP 46450 | 11.30 |
| 2026-06-07 00:00 | 09:28:49.12 | -09:01:55.5 | HIP 46450 | 11.47 |
| 2026-06-07 12:00 | 09:28:49.82 | -09:01:49.9 | HIP 46450 | 11.64 |
| 2026-06-08 00:00 | 09:28:50.54 | -09:01:44.4 | HIP 46450 | 11.81 |
| 2026-06-08 12:00 | 09:28:51.27 | -09:01:39.0 | HIP 46450 | 11.98 |
| 2026-06-09 00:00 | 09:28:52.01 | -09:01:33.6 | HIP 46450 | 12.16 |
| 2026-06-09 12:00 | 09:28:52.76 | -09:01:28.4 | HIP 46450 | 12.33 |
| 2026-06-10 00:00 | 09:28:53.53 | -09:01:23.3 | HIP 46450 | 12.50 |
| 2026-06-10 12:00 | 09:28:54.31 | -09:01:18.3 | HIP 46450 | 12.68 |
| 2026-06-11 00:00 | 09:28:55.10 | -09:01:13.3 | HIP 46450 | 12.86 |
| 2026-06-11 12:00 | 09:28:55.90 | -09:01:08.5 | HIP 46450 | 13.04 |
| 2026-06-12 00:00 | 09:28:56.71 | -09:01:03.8 | HIP 46450 | 13.22 |
| 2026-06-12 12:00 | 09:28:57.53 | -09:00:59.1 | HIP 46450 | 13.40 |
| 2026-06-13 00:00 | 09:28:58.37 | -09:00:54.6 | HIP 46450 | 13.58 |
| 2026-06-13 12:00 | 09:28:59.22 | -09:00:50.1 | HIP 46450 | 13.77 |
| 2026-06-14 00:00 | 09:29:00.08 | -09:00:45.8 | HIP 46450 | 13.96 |
| 2026-06-14 12:00 | 09:29:00.95 | -09:00:41.5 | HIP 46450 | 14.14 |
| 2026-06-15 00:00 | 09:29:01.83 | -09:00:37.4 | HIP 46450 | 14.33 |
| 2026-06-15 12:00 | 09:29:02.72 | -09:00:33.4 | HIP 46450 | 14.52 |
| 2026-06-16 00:00 | 09:29:03.63 | -09:00:29.4 | HIP 46450 | 14.72 |
| 2026-06-16 12:00 | 09:29:04.54 | -09:00:25.6 | HIP 46450 | 14.91 |
| 2026-06-17 00:00 | 09:29:05.47 | -09:00:21.9 | HIP 46450 | 15.11 |
| 2026-06-17 12:00 | 09:29:06.40 | -09:00:18.2 | HIP 46450 | 15.31 |
| 2026-06-18 00:00 | 09:29:07.35 | -09:00:14.7 | HIP 46450 | 15.50 |
| 2026-06-18 12:00 | 09:29:08.31 | -09:00:11.3 | HIP 46450 | 15.71 |
| 2026-06-19 00:00 | 09:29:09.28 | -09:00:07.9 | HIP 46450 | 15.91 |
| 2026-06-19 12:00 | 09:29:10.26 | -09:00:04.7 | HIP 46450 | 16.11 |
| 2026-06-20 00:00 | 09:29:11.25 | -09:00:01.6 | HIP 46450 | 16.32 |
| 2026-06-20 12:00 | 09:29:12.25 | -08:59:58.6 | HIP 46450 | 16.53 |
| 2026-06-21 00:00 | 09:29:13.26 | -08:59:55.6 | HIP 46450 | 16.74 |
| 2026-06-21 12:00 | 09:29:14.28 | -08:59:52.8 | HIP 46450 | 16.95 |
| 2026-06-22 00:00 | 09:29:15.32 | -08:59:50.1 | HIP 46450 | 17.16 |