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 | +7.1779 | -0.282 |
| 1982-07-10 | 1982-08-06 | -6.0580 | -0.022 |
| 1982-08-06 | 1982-08-24 | +9.1335 | +2.617 |
| 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) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 09:29:29.22 | -09:27:24.3 | HIP 46450 | 22.16 |
| 2026-03-26 12:00 | 09:29:28.01 | -09:27:11.8 | HIP 46450 | 21.80 |
| 2026-03-27 00:00 | 09:29:26.82 | -09:26:59.3 | HIP 46450 | 21.44 |
| 2026-03-27 12:00 | 09:29:25.63 | -09:26:46.8 | HIP 46450 | 21.09 |
| 2026-03-28 00:00 | 09:29:24.46 | -09:26:34.2 | HIP 46450 | 20.74 |
| 2026-03-28 12:00 | 09:29:23.30 | -09:26:21.7 | HIP 46450 | 20.39 |
| 2026-03-29 00:00 | 09:29:22.14 | -09:26:09.1 | HIP 46450 | 20.04 |
| 2026-03-29 12:00 | 09:29:21.00 | -09:25:56.5 | HIP 46450 | 19.69 |
| 2026-03-30 00:00 | 09:29:19.87 | -09:25:43.9 | HIP 46450 | 19.35 |
| 2026-03-30 12:00 | 09:29:18.75 | -09:25:31.3 | HIP 46450 | 19.00 |
| 2026-03-31 00:00 | 09:29:17.65 | -09:25:18.7 | HIP 46450 | 18.66 |
| 2026-03-31 12:00 | 09:29:16.55 | -09:25:06.1 | HIP 46450 | 18.32 |
| 2026-04-01 00:00 | 09:29:15.46 | -09:24:53.5 | HIP 46450 | 17.99 |
| 2026-04-01 12:00 | 09:29:14.39 | -09:24:40.8 | HIP 46450 | 17.65 |
| 2026-04-02 00:00 | 09:29:13.33 | -09:24:28.2 | HIP 46450 | 17.32 |
| 2026-04-02 12:00 | 09:29:12.28 | -09:24:15.6 | HIP 46450 | 16.99 |
| 2026-04-03 00:00 | 09:29:11.24 | -09:24:02.9 | HIP 46450 | 16.66 |
| 2026-04-03 12:00 | 09:29:10.21 | -09:23:50.3 | HIP 46450 | 16.33 |
| 2026-04-04 00:00 | 09:29:09.20 | -09:23:37.7 | HIP 46450 | 16.01 |
| 2026-04-04 12:00 | 09:29:08.19 | -09:23:25.0 | HIP 46450 | 15.69 |
| 2026-04-05 00:00 | 09:29:07.20 | -09:23:12.4 | HIP 46450 | 15.37 |
| 2026-04-05 12:00 | 09:29:06.22 | -09:22:59.7 | HIP 46450 | 15.05 |
| 2026-04-06 00:00 | 09:29:05.25 | -09:22:47.1 | HIP 46450 | 14.73 |
| 2026-04-06 12:00 | 09:29:04.30 | -09:22:34.5 | HIP 46450 | 14.42 |
| 2026-04-07 00:00 | 09:29:03.35 | -09:22:21.8 | HIP 46450 | 14.11 |
| 2026-04-07 12:00 | 09:29:02.42 | -09:22:09.2 | HIP 46450 | 13.80 |
| 2026-04-08 00:00 | 09:29:01.50 | -09:21:56.6 | HIP 46450 | 13.49 |
| 2026-04-08 12:00 | 09:29:00.60 | -09:21:44.0 | HIP 46450 | 13.18 |
| 2026-04-09 00:00 | 09:28:59.70 | -09:21:31.4 | HIP 46450 | 12.88 |
| 2026-04-09 12:00 | 09:28:58.82 | -09:21:18.8 | HIP 46450 | 12.58 |
| 2026-04-10 00:00 | 09:28:57.95 | -09:21:06.2 | HIP 46450 | 12.28 |
| 2026-04-10 12:00 | 09:28:57.09 | -09:20:53.7 | HIP 46450 | 11.98 |
| 2026-04-11 00:00 | 09:28:56.25 | -09:20:41.1 | HIP 46450 | 11.69 |
| 2026-04-11 12:00 | 09:28:55.42 | -09:20:28.6 | HIP 46450 | 11.40 |
| 2026-04-12 00:00 | 09:28:54.60 | -09:20:16.1 | HIP 46450 | 11.11 |
| 2026-04-12 12:00 | 09:28:53.79 | -09:20:03.5 | HIP 46450 | 10.82 |
| 2026-04-13 00:00 | 09:28:53.00 | -09:19:51.1 | HIP 46450 | 10.54 |
| 2026-04-13 12:00 | 09:28:52.22 | -09:19:38.6 | HIP 46450 | 10.25 |
| 2026-04-14 00:00 | 09:28:51.45 | -09:19:26.1 | HIP 46450 | 9.97 |
| 2026-04-14 12:00 | 09:28:50.70 | -09:19:13.7 | HIP 46450 | 9.69 |
| 2026-04-15 00:00 | 09:28:49.96 | -09:19:01.3 | HIP 46450 | 9.42 |
| 2026-04-15 12:00 | 09:28:49.23 | -09:18:48.9 | HIP 46450 | 9.14 |
| 2026-04-16 00:00 | 09:28:48.51 | -09:18:36.5 | HIP 46450 | 8.87 |