C/2022 V2 (Lemmon)
メタデータ
| 項目 | 値 |
|---|---|
| Designation | C/2022 V2 (Lemmon) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2023-11-01T22:13:51.689280Z |
| Orbit solution date (soln_date, UTC) | 2024-06-06T23:12:25Z |
| Obs used | 717 |
| NEO | - |
| M1 | 14.700 |
| K1 | 4.500 |
| PC | - |
| Discovery observation (MPC, UTC) | 2022-11-02T01:32:56.688000Z |
| Discovery magnitude (MPC) | 20.62 G |
| Discovery observatory (MPC) | G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2023-09-03.0000000 |
| e | 0.94400369 |
| q (au) | 2.063574 |
| a (au) | 36.851962 |
| i (deg) | 98.906187 |
| Ω (om, deg) | 332.870315 |
| ω (w, deg) | 168.949317 |
| M (ma, deg) | 359.735984 |
等級
散乱 + 全体線形
$$ M_a = (16.023 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 16.023 |
| n | 2.000 |
| gf | 1.000 |
| gb | -0.667 |
| k | 0.800 |
| 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 |
|---|---|---|---|
| 2022-07-20 | 2023-04-09 | +3.8316 | -2.017 |
| 2023-04-09 | 2023-10-27 | -2.7235 | +0.975 |
| 2023-11-10 | 2024-04-16 | +0.1898 | +0.000 |
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) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 02:13:26.38 | -54:12:46.2 | HIP 10246 | 17.41 |
| 2026-03-26 12:00 | 02:13:40.56 | -54:10:33.1 | HIP 10246 | 18.13 |
| 2026-03-27 00:00 | 02:13:54.79 | -54:08:21.2 | HIP 10246 | 19.32 |
| 2026-03-27 12:00 | 02:14:09.09 | -54:06:10.6 | HIP 10246 | 20.90 |
| 2026-03-28 00:00 | 02:14:23.44 | -54:04:01.4 | HIP 10246 | 22.79 |
| 2026-03-28 12:00 | 02:14:37.85 | -54:01:53.5 | HIP 10301 | 24.16 |
| 2026-03-29 00:00 | 02:14:52.32 | -53:59:46.8 | HIP 10650 | 21.93 |
| 2026-03-29 12:00 | 02:15:06.84 | -53:57:41.5 | HIP 10650 | 19.09 |
| 2026-03-30 00:00 | 02:15:21.41 | -53:55:37.5 | HIP 10650 | 16.30 |
| 2026-03-30 12:00 | 02:15:36.03 | -53:53:34.9 | HIP 10650 | 13.59 |
| 2026-03-31 00:00 | 02:15:50.71 | -53:51:33.5 | HIP 10650 | 11.00 |
| 2026-03-31 12:00 | 02:16:05.44 | -53:49:33.5 | HIP 10650 | 8.64 |
| 2026-04-01 00:00 | 02:16:20.21 | -53:47:34.8 | HIP 10650 | 6.75 |
| 2026-04-01 12:00 | 02:16:35.04 | -53:45:37.4 | HIP 10650 | 5.80 |
| 2026-04-02 00:00 | 02:16:49.91 | -53:43:41.4 | HIP 10650 | 6.20 |
| 2026-04-02 12:00 | 02:17:04.82 | -53:41:46.7 | HIP 10650 | 7.76 |
| 2026-04-03 00:00 | 02:17:19.78 | -53:39:53.3 | HIP 10650 | 9.92 |
| 2026-04-03 12:00 | 02:17:34.79 | -53:38:01.3 | HIP 10650 | 12.38 |
| 2026-04-04 00:00 | 02:17:49.84 | -53:36:10.6 | HIP 10650 | 14.98 |
| 2026-04-04 12:00 | 02:18:04.93 | -53:34:21.3 | HIP 10650 | 17.66 |
| 2026-04-05 00:00 | 02:18:20.06 | -53:32:33.3 | HIP 10650 | 20.37 |
| 2026-04-05 12:00 | 02:18:35.24 | -53:30:46.7 | HIP 10650 | 23.12 |
| 2026-04-06 00:00 | 02:18:50.45 | -53:29:01.4 | HIP 10572 | 25.08 |
| 2026-04-06 12:00 | 02:19:05.70 | -53:27:17.5 | HIP 10572 | 27.02 |
| 2026-04-07 00:00 | 02:19:20.99 | -53:25:35.0 | HIP 10572 | 29.11 |
| 2026-04-07 12:00 | 02:19:36.31 | -53:23:53.8 | HIP 10940 | 28.55 |
| 2026-04-08 00:00 | 02:19:51.67 | -53:22:14.0 | HIP 10940 | 26.13 |
| 2026-04-08 12:00 | 02:20:07.07 | -53:20:35.5 | HIP 10940 | 23.83 |
| 2026-04-09 00:00 | 02:20:22.49 | -53:18:58.5 | HIP 10940 | 21.67 |
| 2026-04-09 12:00 | 02:20:37.95 | -53:17:22.8 | HIP 10940 | 19.70 |
| 2026-04-10 00:00 | 02:20:53.45 | -53:15:48.5 | HIP 11071 | 17.80 |
| 2026-04-10 12:00 | 02:21:08.97 | -53:14:15.5 | HIP 11071 | 15.01 |
| 2026-04-11 00:00 | 02:21:24.52 | -53:12:44.0 | HIP 11071 | 12.22 |
| 2026-04-11 12:00 | 02:21:40.10 | -53:11:13.9 | HIP 11071 | 9.45 |
| 2026-04-12 00:00 | 02:21:55.71 | -53:09:45.1 | HIP 11071 | 6.69 |
| 2026-04-12 12:00 | 02:22:11.35 | -53:08:17.8 | HIP 11071 | 3.96 |
| 2026-04-13 00:00 | 02:22:27.01 | -53:06:51.9 | HIP 11071 | 1.34 |
| 2026-04-13 12:00 | 02:22:42.70 | -53:05:27.3 | HIP 11071 | 1.76 |
| 2026-04-14 00:00 | 02:22:58.41 | -53:04:04.2 | HIP 11071 | 4.41 |
| 2026-04-14 12:00 | 02:23:14.14 | -53:02:42.5 | HIP 11071 | 7.12 |
| 2026-04-15 00:00 | 02:23:29.90 | -53:01:22.2 | HIP 11071 | 9.83 |
| 2026-04-15 12:00 | 02:23:45.67 | -53:00:03.3 | HIP 11187 | 11.75 |
| 2026-04-16 00:00 | 02:24:01.47 | -52:58:45.9 | HIP 11187 | 10.14 |