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) |
|---|---|---|---|---|
| 2026-09-25 00:00 | 09:33:47.48 | -09:19:42.9 | HIP 46875 | 9.78 |
| 2026-09-25 12:00 | 09:33:48.68 | -09:19:55.6 | HIP 46875 | 10.10 |
| 2026-09-26 00:00 | 09:33:49.87 | -09:20:08.3 | HIP 46875 | 10.41 |
| 2026-09-26 12:00 | 09:33:51.06 | -09:20:21.1 | HIP 46875 | 10.73 |
| 2026-09-27 00:00 | 09:33:52.23 | -09:20:33.9 | HIP 46875 | 11.04 |
| 2026-09-27 12:00 | 09:33:53.39 | -09:20:46.7 | HIP 46875 | 11.36 |
| 2026-09-28 00:00 | 09:33:54.55 | -09:20:59.6 | HIP 46875 | 11.67 |
| 2026-09-28 12:00 | 09:33:55.69 | -09:21:12.4 | HIP 46875 | 11.99 |
| 2026-09-29 00:00 | 09:33:56.83 | -09:21:25.3 | HIP 46875 | 12.31 |
| 2026-09-29 12:00 | 09:33:57.95 | -09:21:38.2 | HIP 46875 | 12.62 |
| 2026-09-30 00:00 | 09:33:59.07 | -09:21:51.2 | HIP 46875 | 12.94 |
| 2026-09-30 12:00 | 09:34:00.18 | -09:22:04.1 | HIP 46875 | 13.25 |
| 2026-10-01 00:00 | 09:34:01.28 | -09:22:17.1 | HIP 46875 | 13.57 |
| 2026-10-01 12:00 | 09:34:02.36 | -09:22:30.0 | HIP 46875 | 13.88 |
| 2026-10-02 00:00 | 09:34:03.44 | -09:22:43.0 | HIP 46875 | 14.19 |
| 2026-10-02 12:00 | 09:34:04.51 | -09:22:56.0 | HIP 46875 | 14.50 |
| 2026-10-03 00:00 | 09:34:05.56 | -09:23:09.1 | HIP 46875 | 14.81 |
| 2026-10-03 12:00 | 09:34:06.61 | -09:23:22.1 | HIP 46875 | 15.12 |
| 2026-10-04 00:00 | 09:34:07.65 | -09:23:35.1 | HIP 46875 | 15.43 |
| 2026-10-04 12:00 | 09:34:08.67 | -09:23:48.2 | HIP 46875 | 15.74 |
| 2026-10-05 00:00 | 09:34:09.69 | -09:24:01.3 | HIP 46875 | 16.04 |
| 2026-10-05 12:00 | 09:34:10.69 | -09:24:14.3 | HIP 46875 | 16.35 |
| 2026-10-06 00:00 | 09:34:11.69 | -09:24:27.4 | HIP 46875 | 16.65 |
| 2026-10-06 12:00 | 09:34:12.67 | -09:24:40.5 | HIP 46875 | 16.95 |
| 2026-10-07 00:00 | 09:34:13.65 | -09:24:53.6 | HIP 46875 | 17.25 |
| 2026-10-07 12:00 | 09:34:14.61 | -09:25:06.7 | HIP 46875 | 17.55 |
| 2026-10-08 00:00 | 09:34:15.56 | -09:25:19.8 | HIP 46875 | 17.85 |
| 2026-10-08 12:00 | 09:34:16.50 | -09:25:32.9 | HIP 46875 | 18.14 |
| 2026-10-09 00:00 | 09:34:17.43 | -09:25:46.0 | HIP 46875 | 18.43 |
| 2026-10-09 12:00 | 09:34:18.34 | -09:25:59.2 | HIP 46875 | 18.72 |
| 2026-10-10 00:00 | 09:34:19.25 | -09:26:12.3 | HIP 46875 | 19.01 |
| 2026-10-10 12:00 | 09:34:20.14 | -09:26:25.4 | HIP 46875 | 19.30 |
| 2026-10-11 00:00 | 09:34:21.03 | -09:26:38.5 | HIP 46875 | 19.59 |
| 2026-10-11 12:00 | 09:34:21.90 | -09:26:51.6 | HIP 46875 | 19.87 |
| 2026-10-12 00:00 | 09:34:22.76 | -09:27:04.7 | HIP 46875 | 20.15 |
| 2026-10-12 12:00 | 09:34:23.61 | -09:27:17.8 | HIP 46875 | 20.43 |
| 2026-10-13 00:00 | 09:34:24.44 | -09:27:30.9 | HIP 46875 | 20.71 |
| 2026-10-13 12:00 | 09:34:25.27 | -09:27:44.0 | HIP 46875 | 20.98 |
| 2026-10-14 00:00 | 09:34:26.08 | -09:27:57.1 | HIP 46875 | 21.26 |
| 2026-10-14 12:00 | 09:34:26.88 | -09:28:10.2 | HIP 46875 | 21.53 |
| 2026-10-15 00:00 | 09:34:27.67 | -09:28:23.2 | HIP 46875 | 21.80 |
| 2026-10-15 12:00 | 09:34:28.44 | -09:28:36.3 | HIP 46875 | 22.06 |
| 2026-10-16 00:00 | 09:34:29.21 | -09:28:49.3 | HIP 46875 | 22.33 |