C/1975 T2 (Suzuki-Saigusa-Mori)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/1975 T2 (Suzuki-Saigusa-Mori) |
| Type | C |
| Perihelion (tp_cal, UTC) | 1975-10-15T08:38:49.142400Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:29:24Z |
| Obs used | 112 |
| NEO | - |
| M1 | 9.700 |
| K1 | 10.000 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 1975-10-31.0000000 |
| e | 0.98560140 |
| q (au) | 0.838053 |
| a (au) | 58.203770 |
| i (deg) | 118.232772 |
| Ω (om, deg) | 216.805399 |
| ω (w, deg) | 152.019697 |
| M (ma, deg) | 0.034714 |
等級
散乱 + 全体線形
$$ M_a = (9.537 + 2.320\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.537 |
| n | 2.320 |
| 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 |
|---|---|---|---|
| 1975-10-15 | 1975-11-12 | -10.1367 | +0.204 |
| 1975-11-12 | 1975-11-25 | -43.1378 | +1.379 |
| 1975-11-25 | 1976-01-09 | +13.8416 | -1.712 |
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 | 14:56:52.99 | -49:56:34.9 | HIP 73204 | 8.94 |
| 2026-02-03 12:00 | 14:56:53.12 | -49:56:49.8 | HIP 73204 | 9.04 |
| 2026-02-04 00:00 | 14:56:53.22 | -49:57:04.7 | HIP 73204 | 9.15 |
| 2026-02-04 12:00 | 14:56:53.30 | -49:57:19.5 | HIP 73204 | 9.27 |
| 2026-02-05 00:00 | 14:56:53.36 | -49:57:34.3 | HIP 73204 | 9.40 |
| 2026-02-05 12:00 | 14:56:53.40 | -49:57:49.0 | HIP 73204 | 9.54 |
| 2026-02-06 00:00 | 14:56:53.41 | -49:58:03.6 | HIP 73204 | 9.68 |
| 2026-02-06 12:00 | 14:56:53.40 | -49:58:18.2 | HIP 73164 | 9.82 |
| 2026-02-07 00:00 | 14:56:53.36 | -49:58:32.8 | HIP 73164 | 9.59 |
| 2026-02-07 12:00 | 14:56:53.30 | -49:58:47.3 | HIP 73164 | 9.36 |
| 2026-02-08 00:00 | 14:56:53.22 | -49:59:01.7 | HIP 73164 | 9.13 |
| 2026-02-08 12:00 | 14:56:53.11 | -49:59:16.1 | HIP 73164 | 8.91 |
| 2026-02-09 00:00 | 14:56:52.97 | -49:59:30.4 | HIP 73164 | 8.68 |
| 2026-02-09 12:00 | 14:56:52.82 | -49:59:44.6 | HIP 73164 | 8.46 |
| 2026-02-10 00:00 | 14:56:52.64 | -49:59:58.8 | HIP 73164 | 8.24 |
| 2026-02-10 12:00 | 14:56:52.43 | -50:00:13.0 | HIP 73164 | 8.03 |
| 2026-02-11 00:00 | 14:56:52.20 | -50:00:27.0 | HIP 73164 | 7.82 |
| 2026-02-11 12:00 | 14:56:51.95 | -50:00:41.0 | HIP 73164 | 7.62 |
| 2026-02-12 00:00 | 14:56:51.67 | -50:00:54.9 | HIP 73164 | 7.41 |
| 2026-02-12 12:00 | 14:56:51.37 | -50:01:08.8 | HIP 73164 | 7.22 |
| 2026-02-13 00:00 | 14:56:51.05 | -50:01:22.6 | HIP 73164 | 7.02 |
| 2026-02-13 12:00 | 14:56:50.70 | -50:01:36.3 | HIP 73164 | 6.84 |
| 2026-02-14 00:00 | 14:56:50.33 | -50:01:49.9 | HIP 73164 | 6.66 |
| 2026-02-14 12:00 | 14:56:49.93 | -50:02:03.5 | HIP 73164 | 6.48 |
| 2026-02-15 00:00 | 14:56:49.51 | -50:02:17.0 | HIP 73164 | 6.31 |
| 2026-02-15 12:00 | 14:56:49.07 | -50:02:30.4 | HIP 73164 | 6.15 |
| 2026-02-16 00:00 | 14:56:48.60 | -50:02:43.8 | HIP 73164 | 6.00 |
| 2026-02-16 12:00 | 14:56:48.11 | -50:02:57.1 | HIP 73164 | 5.86 |
| 2026-02-17 00:00 | 14:56:47.59 | -50:03:10.2 | HIP 73164 | 5.72 |
| 2026-02-17 12:00 | 14:56:47.05 | -50:03:23.3 | HIP 73164 | 5.60 |
| 2026-02-18 00:00 | 14:56:46.49 | -50:03:36.4 | HIP 73164 | 5.49 |
| 2026-02-18 12:00 | 14:56:45.90 | -50:03:49.3 | HIP 73164 | 5.38 |
| 2026-02-19 00:00 | 14:56:45.29 | -50:04:02.2 | HIP 73164 | 5.29 |
| 2026-02-19 12:00 | 14:56:44.65 | -50:04:15.0 | HIP 73164 | 5.22 |
| 2026-02-20 00:00 | 14:56:44.00 | -50:04:27.7 | HIP 73164 | 5.15 |
| 2026-02-20 12:00 | 14:56:43.31 | -50:04:40.3 | HIP 73164 | 5.10 |
| 2026-02-21 00:00 | 14:56:42.61 | -50:04:52.8 | HIP 73164 | 5.07 |
| 2026-02-21 12:00 | 14:56:41.88 | -50:05:05.2 | HIP 73164 | 5.05 |
| 2026-02-22 00:00 | 14:56:41.13 | -50:05:17.5 | HIP 73164 | 5.04 |
| 2026-02-22 12:00 | 14:56:40.35 | -50:05:29.8 | HIP 73164 | 5.05 |
| 2026-02-23 00:00 | 14:56:39.55 | -50:05:41.9 | HIP 73164 | 5.08 |
| 2026-02-23 12:00 | 14:56:38.73 | -50:05:54.0 | HIP 73164 | 5.12 |
| 2026-02-24 00:00 | 14:56:37.89 | -50:06:06.0 | HIP 73164 | 5.17 |