C/1969 T1 (Tago-Sato-Kosaka)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1969 T1 (Tago-Sato-Kosaka) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1969-12-21T06:25:38.887680Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:19Z |
| Obs used | 305 |
| NEO | - |
| M1 | 6.500 |
| K1 | 11.750 |
| PC | - |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 1970-01-21.0000000 |
| e | 0.99992618 |
| q (au) | 0.472639 |
| a (au) | 6402.315951 |
| i (deg) | 75.817750 |
| Ω (om, deg) | 101.659779 |
| ω (w, deg) | 267.834299 |
| M (ma, deg) | 0.000059 |
等級
散乱 + 全体線形
$$ M_a = (6.542 + 2.871\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 6.542 |
| n | 2.871 |
| gf | 0.800 |
| gb | -0.500 |
| 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 |
|---|---|---|---|
| 1969-10-13 | 1969-12-20 | +2.1284 | +0.751 |
| 1969-12-21 | 1970-01-01 | +4.0862 | +0.705 |
| 1970-01-01 | 1970-01-08 | +9.6982 | +2.316 |
| 1970-01-08 | 1970-01-14 | +1.5927 | +0.867 |
| 1970-01-14 | 1970-01-20 | -8.6886 | -0.450 |
| 1970-01-20 | 1970-02-06 | -4.6886 | +0.020 |
| 1970-02-06 | 1970-04-05 | +6.6007 | -1.152 |
| 1970-04-05 | 1970-05-01 | -12.3600 | +4.829 |
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) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 14:58:15.66 | +68:00:37.6 | HIP 73327 | 16.30 |
| 2026-02-03 12:00 | 14:58:15.91 | +68:00:59.4 | HIP 73327 | 16.64 |
| 2026-02-04 00:00 | 14:58:16.14 | +68:01:21.2 | HIP 73327 | 16.98 |
| 2026-02-04 12:00 | 14:58:16.33 | +68:01:43.0 | HIP 73327 | 17.33 |
| 2026-02-05 00:00 | 14:58:16.49 | +68:02:04.8 | HIP 73327 | 17.68 |
| 2026-02-05 12:00 | 14:58:16.62 | +68:02:26.7 | HIP 73327 | 18.03 |
| 2026-02-06 00:00 | 14:58:16.71 | +68:02:48.5 | HIP 73327 | 18.38 |
| 2026-02-06 12:00 | 14:58:16.77 | +68:03:10.3 | HIP 73327 | 18.73 |
| 2026-02-07 00:00 | 14:58:16.80 | +68:03:32.2 | HIP 73327 | 19.09 |
| 2026-02-07 12:00 | 14:58:16.79 | +68:03:54.0 | HIP 73327 | 19.44 |
| 2026-02-08 00:00 | 14:58:16.76 | +68:04:15.9 | HIP 73327 | 19.80 |
| 2026-02-08 12:00 | 14:58:16.69 | +68:04:37.7 | HIP 73327 | 20.15 |
| 2026-02-09 00:00 | 14:58:16.58 | +68:04:59.6 | HIP 73327 | 20.51 |
| 2026-02-09 12:00 | 14:58:16.45 | +68:05:21.4 | HIP 73327 | 20.87 |
| 2026-02-10 00:00 | 14:58:16.28 | +68:05:43.2 | HIP 73327 | 21.23 |
| 2026-02-10 12:00 | 14:58:16.07 | +68:06:05.1 | HIP 73327 | 21.59 |
| 2026-02-11 00:00 | 14:58:15.84 | +68:06:26.9 | HIP 72963 | 21.88 |
| 2026-02-11 12:00 | 14:58:15.57 | +68:06:48.7 | HIP 72963 | 22.00 |
| 2026-02-12 00:00 | 14:58:15.27 | +68:07:10.5 | HIP 72963 | 22.13 |
| 2026-02-12 12:00 | 14:58:14.93 | +68:07:32.3 | HIP 72963 | 22.25 |
| 2026-02-13 00:00 | 14:58:14.57 | +68:07:54.0 | HIP 72963 | 22.38 |
| 2026-02-13 12:00 | 14:58:14.16 | +68:08:15.8 | HIP 72963 | 22.51 |
| 2026-02-14 00:00 | 14:58:13.73 | +68:08:37.5 | HIP 72963 | 22.64 |
| 2026-02-14 12:00 | 14:58:13.26 | +68:08:59.2 | HIP 72963 | 22.78 |
| 2026-02-15 00:00 | 14:58:12.76 | +68:09:20.9 | HIP 72963 | 22.92 |
| 2026-02-15 12:00 | 14:58:12.23 | +68:09:42.5 | HIP 72963 | 23.05 |
| 2026-02-16 00:00 | 14:58:11.66 | +68:10:04.2 | HIP 72963 | 23.20 |
| 2026-02-16 12:00 | 14:58:11.07 | +68:10:25.8 | HIP 72963 | 23.34 |
| 2026-02-17 00:00 | 14:58:10.43 | +68:10:47.3 | HIP 72963 | 23.49 |
| 2026-02-17 12:00 | 14:58:09.77 | +68:11:08.9 | HIP 72963 | 23.63 |
| 2026-02-18 00:00 | 14:58:09.07 | +68:11:30.4 | HIP 72963 | 23.78 |
| 2026-02-18 12:00 | 14:58:08.34 | +68:11:51.8 | HIP 72963 | 23.93 |
| 2026-02-19 00:00 | 14:58:07.58 | +68:12:13.3 | HIP 72963 | 24.09 |
| 2026-02-19 12:00 | 14:58:06.78 | +68:12:34.6 | HIP 72963 | 24.24 |
| 2026-02-20 00:00 | 14:58:05.95 | +68:12:56.0 | HIP 72963 | 24.40 |
| 2026-02-20 12:00 | 14:58:05.09 | +68:13:17.3 | HIP 72963 | 24.55 |
| 2026-02-21 00:00 | 14:58:04.20 | +68:13:38.5 | HIP 72963 | 24.71 |
| 2026-02-21 12:00 | 14:58:03.27 | +68:13:59.8 | HIP 72963 | 24.87 |
| 2026-02-22 00:00 | 14:58:02.31 | +68:14:20.9 | HIP 72963 | 25.04 |
| 2026-02-22 12:00 | 14:58:01.32 | +68:14:42.0 | HIP 72963 | 25.20 |
| 2026-02-23 00:00 | 14:58:00.30 | +68:15:03.1 | HIP 72963 | 25.37 |
| 2026-02-23 12:00 | 14:57:59.24 | +68:15:24.1 | HIP 72963 | 25.53 |
| 2026-02-24 00:00 | 14:57:58.15 | +68:15:45.0 | HIP 72963 | 25.70 |