276P/Vorobjov
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 276P/Vorobjov |
| Type | P |
| Perihelion (tp_cal, UTC) | 2024-12-12T17:38:23.265600Z |
| Orbit solution date (soln_date, UTC) | 2026-03-07T14:43:35Z |
| Obs used | 1273 |
| NEO | - |
| M1 | 11.000 |
| K1 | 7.500 |
| PC | 0.030 |
オスキュレーティング軌道要素
| 項目 | 値 |
|---|---|
| Epoch (epoch_cal, TDB) | 2023-02-01.0000000 |
| e | 0.26806229 |
| q (au) | 3.898225 |
| a (au) | 5.325897 |
| i (deg) | 14.811133 |
| Ω (om, deg) | 211.347487 |
| ω (w, deg) | 199.482340 |
| M (ma, deg) | 305.412530 |
等級
散乱 + 全体線形
$$ M_a = (9.696 + 3.107\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.696 |
| n | 3.107 |
| gf | 1.000 |
| gb | -0.959 |
| 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 |
|---|---|---|---|
| 2019-05-02 | 2022-09-01 | -18.3765 | +14.840 |
| 2022-09-01 | 2024-12-10 | +14.8812 | -8.885 |
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 | 06:35:53.21 | +07:55:02.7 | HIP 31577 | 15.74 |
| 2026-03-26 12:00 | 06:36:05.70 | +07:56:20.6 | HIP 31577 | 15.21 |
| 2026-03-27 00:00 | 06:36:18.39 | +07:57:38.0 | HIP 31577 | 15.40 |
| 2026-03-27 12:00 | 06:36:31.26 | +07:58:54.8 | HIP 31577 | 16.29 |
| 2026-03-28 00:00 | 06:36:44.33 | +08:00:11.2 | HIP 31577 | 17.82 |
| 2026-03-28 12:00 | 06:36:57.58 | +08:01:27.0 | HIP 31577 | 19.85 |
| 2026-03-29 00:00 | 06:37:11.03 | +08:02:42.3 | HIP 31704 | 21.97 |
| 2026-03-29 12:00 | 06:37:24.66 | +08:03:57.1 | HIP 31704 | 21.63 |
| 2026-03-30 00:00 | 06:37:38.47 | +08:05:11.4 | HIP 31792 | 19.25 |
| 2026-03-30 12:00 | 06:37:52.47 | +08:06:25.1 | HIP 31792 | 16.62 |
| 2026-03-31 00:00 | 06:38:06.65 | +08:07:38.2 | HIP 31792 | 14.43 |
| 2026-03-31 12:00 | 06:38:21.01 | +08:08:50.8 | HIP 31792 | 12.91 |
| 2026-04-01 00:00 | 06:38:35.55 | +08:10:02.9 | HIP 31792 | 12.37 |
| 2026-04-01 12:00 | 06:38:50.27 | +08:11:14.4 | HIP 31792 | 12.95 |
| 2026-04-02 00:00 | 06:39:05.17 | +08:12:25.3 | HIP 31854 | 11.22 |
| 2026-04-02 12:00 | 06:39:20.25 | +08:13:35.6 | HIP 31854 | 8.20 |
| 2026-04-03 00:00 | 06:39:35.50 | +08:14:45.4 | HIP 31854 | 6.27 |
| 2026-04-03 12:00 | 06:39:50.92 | +08:15:54.6 | HIP 31854 | 6.56 |
| 2026-04-04 00:00 | 06:40:06.52 | +08:17:03.2 | HIP 31854 | 8.90 |
| 2026-04-04 12:00 | 06:40:22.29 | +08:18:11.2 | HIP 31854 | 12.21 |
| 2026-04-05 00:00 | 06:40:38.24 | +08:19:18.6 | HIP 32025 | 14.24 |
| 2026-04-05 12:00 | 06:40:54.35 | +08:20:25.4 | HIP 32025 | 10.55 |
| 2026-04-06 00:00 | 06:41:10.63 | +08:21:31.6 | HIP 32025 | 7.35 |
| 2026-04-06 12:00 | 06:41:27.08 | +08:22:37.2 | HIP 32025 | 5.63 |
| 2026-04-07 00:00 | 06:41:43.70 | +08:23:42.1 | HIP 32025 | 6.73 |
| 2026-04-07 12:00 | 06:42:00.48 | +08:24:46.5 | HIP 32025 | 9.79 |
| 2026-04-08 00:00 | 06:42:17.43 | +08:25:50.2 | HIP 32025 | 13.58 |
| 2026-04-08 12:00 | 06:42:34.54 | +08:26:53.3 | HIP 32025 | 17.66 |
| 2026-04-09 00:00 | 06:42:51.82 | +08:27:55.7 | HIP 32260 | 19.78 |
| 2026-04-09 12:00 | 06:43:09.25 | +08:28:57.5 | HIP 32260 | 15.75 |
| 2026-04-10 00:00 | 06:43:26.85 | +08:29:58.7 | HIP 32260 | 11.96 |
| 2026-04-10 12:00 | 06:43:44.61 | +08:30:59.2 | HIP 32260 | 8.80 |
| 2026-04-11 00:00 | 06:44:02.52 | +08:31:59.1 | HIP 32260 | 7.22 |
| 2026-04-11 12:00 | 06:44:20.59 | +08:32:58.3 | HIP 32260 | 8.24 |
| 2026-04-12 00:00 | 06:44:38.82 | +08:33:56.8 | HIP 32260 | 11.23 |
| 2026-04-12 12:00 | 06:44:57.21 | +08:34:54.7 | HIP 32260 | 15.08 |
| 2026-04-13 00:00 | 06:45:15.75 | +08:35:51.8 | HIP 32463 | 18.96 |
| 2026-04-13 12:00 | 06:45:34.44 | +08:36:48.3 | HIP 32463 | 14.42 |
| 2026-04-14 00:00 | 06:45:53.28 | +08:37:44.2 | HIP 32463 | 9.99 |
| 2026-04-14 12:00 | 06:46:12.28 | +08:38:39.3 | HIP 32463 | 6.04 |
| 2026-04-15 00:00 | 06:46:31.42 | +08:39:33.8 | HIP 32463 | 4.34 |
| 2026-04-15 12:00 | 06:46:50.72 | +08:40:27.5 | HIP 32463 | 6.91 |
| 2026-04-16 00:00 | 06:47:10.16 | +08:41:20.5 | HIP 32526 | 10.28 |