P/2021 V2 (Fuls)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | P/2021 V2 (Fuls) |
| Type | P |
| Perihelion (tp_cal, UTC) | 2023-01-21T10:09:35.496000Z |
| Orbit solution date (soln_date, UTC) | 2024-06-06T23:12:42Z |
| Obs used | 500 |
| NEO | - |
| M1 | 13.500 |
| K1 | 4.750 |
| PC | - |
| Discovery observation (MPC, UTC) | 2021-11-07T07:16:45.811200Z |
| Discovery magnitude (MPC) | 19.72 G |
| Discovery observatory (MPC) | G96 · University of Arizona Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2022-12-05.0000000 |
| e | 0.61379381 |
| q (au) | 3.496557 |
| a (au) | 9.053602 |
| i (deg) | 12.694194 |
| Ω (om, deg) | 232.285290 |
| ω (w, deg) | 259.829523 |
| M (ma, deg) | 358.284211 |
等級
散乱 + 全体線形
$$ M_a = (11.970 + 2.369\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 11.970 |
| n | 2.369 |
| gf | 1.000 |
| gb | -0.928 |
| k | 1.000 |
| δ90 | 10.000 |
| 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 |
|---|---|---|---|
| 2021-08-07 | 2022-01-05 | +33.5068 | -22.228 |
| 2022-01-05 | 2023-01-20 | -9.6477 | +5.268 |
| 2023-01-22 | 2024-05-31 | +2.3305 | -1.332 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
ファインディングチャート
天体暦
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-06-01 00:00 | 16:37:03.62 | -17:29:12.7 | HIP 81393 | 4.90 |
| 2026-06-01 12:00 | 16:36:51.55 | -17:28:32.5 | HIP 81393 | 7.57 |
| 2026-06-02 00:00 | 16:36:39.49 | -17:27:52.5 | HIP 81393 | 10.39 |
| 2026-06-02 12:00 | 16:36:27.45 | -17:27:12.7 | HIP 81393 | 13.27 |
| 2026-06-03 00:00 | 16:36:15.41 | -17:26:33.0 | HIP 81393 | 16.17 |
| 2026-06-03 12:00 | 16:36:03.38 | -17:25:53.4 | HIP 81393 | 19.08 |
| 2026-06-04 00:00 | 16:35:51.37 | -17:25:14.1 | HIP 81393 | 22.00 |
| 2026-06-04 12:00 | 16:35:39.38 | -17:24:34.8 | HIP 81366 | 24.44 |
| 2026-06-05 00:00 | 16:35:27.40 | -17:23:55.8 | HIP 81366 | 26.40 |
| 2026-06-05 12:00 | 16:35:15.44 | -17:23:16.9 | HIP 81366 | 28.52 |
| 2026-06-06 00:00 | 16:35:03.49 | -17:22:38.2 | HIP 81366 | 30.77 |
| 2026-06-06 12:00 | 16:34:51.57 | -17:21:59.6 | HIP 81366 | 33.13 |
| 2026-06-07 00:00 | 16:34:39.68 | -17:21:21.3 | HIP 80998 | 35.20 |
| 2026-06-07 12:00 | 16:34:27.80 | -17:20:43.1 | HIP 80998 | 33.13 |
| 2026-06-08 00:00 | 16:34:15.96 | -17:20:05.1 | HIP 80998 | 31.19 |
| 2026-06-08 12:00 | 16:34:04.14 | -17:19:27.3 | HIP 80998 | 29.41 |
| 2026-06-09 00:00 | 16:33:52.35 | -17:18:49.7 | HIP 80998 | 27.82 |
| 2026-06-09 12:00 | 16:33:40.59 | -17:18:12.3 | HIP 80998 | 26.45 |
| 2026-06-10 00:00 | 16:33:28.86 | -17:17:35.1 | HIP 80998 | 25.33 |
| 2026-06-10 12:00 | 16:33:17.17 | -17:16:58.1 | HIP 80998 | 24.50 |
| 2026-06-11 00:00 | 16:33:05.51 | -17:16:21.4 | HIP 80998 | 23.98 |
| 2026-06-11 12:00 | 16:32:53.88 | -17:15:44.8 | HIP 80998 | 23.79 |
| 2026-06-12 00:00 | 16:32:42.30 | -17:15:08.4 | HIP 80998 | 23.93 |
| 2026-06-12 12:00 | 16:32:30.75 | -17:14:32.3 | HIP 80998 | 24.41 |
| 2026-06-13 00:00 | 16:32:19.25 | -17:13:56.4 | HIP 80998 | 25.18 |
| 2026-06-13 12:00 | 16:32:07.79 | -17:13:20.8 | HIP 80998 | 26.23 |
| 2026-06-14 00:00 | 16:31:56.37 | -17:12:45.3 | HIP 80998 | 27.52 |
| 2026-06-14 12:00 | 16:31:45.00 | -17:12:10.1 | HIP 80998 | 29.01 |
| 2026-06-15 00:00 | 16:31:33.68 | -17:11:35.2 | HIP 80998 | 30.67 |
| 2026-06-15 12:00 | 16:31:22.40 | -17:11:00.4 | HIP 80940 | 32.03 |
| 2026-06-16 00:00 | 16:31:11.18 | -17:10:26.0 | HIP 80940 | 33.03 |
| 2026-06-16 12:00 | 16:31:00.01 | -17:09:51.8 | HIP 80894 | 33.17 |
| 2026-06-17 00:00 | 16:30:48.89 | -17:09:17.8 | HIP 80894 | 32.87 |
| 2026-06-17 12:00 | 16:30:37.82 | -17:08:44.1 | HIP 80894 | 32.80 |
| 2026-06-18 00:00 | 16:30:26.82 | -17:08:10.6 | HIP 80711 | 31.85 |
| 2026-06-18 12:00 | 16:30:15.87 | -17:07:37.5 | HIP 80711 | 30.28 |
| 2026-06-19 00:00 | 16:30:04.98 | -17:07:04.5 | HIP 80711 | 28.87 |
| 2026-06-19 12:00 | 16:29:54.15 | -17:06:31.9 | HIP 80711 | 27.66 |
| 2026-06-20 00:00 | 16:29:43.38 | -17:05:59.5 | HIP 80711 | 26.65 |
| 2026-06-20 12:00 | 16:29:32.68 | -17:05:27.4 | HIP 80711 | 25.88 |
| 2026-06-21 00:00 | 16:29:22.04 | -17:04:55.6 | HIP 80711 | 25.35 |
| 2026-06-21 12:00 | 16:29:11.46 | -17:04:24.0 | HIP 80711 | 25.08 |
| 2026-06-22 00:00 | 16:29:00.96 | -17:03:52.8 | HIP 80711 | 25.08 |