276P/Vorobjov
メタデータ
| 項目 | 値 |
|---|---|
| Designation | 276P/Vorobjov |
| Type | P |
| Perihelion (tp_cal, UTC) | 2024-12-12T19:29:49.251840Z |
| Orbit solution date (soln_date, UTC) | 2026-01-07T15:43:03Z |
| Obs used | 1244 |
| 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) | 2023-01-06.0000000 |
| e | 0.26801232 |
| q (au) | 3.898229 |
| a (au) | 5.325539 |
| i (deg) | 14.810984 |
| Ω (om, deg) | 211.348909 |
| ω (w, deg) | 199.488545 |
| M (ma, deg) | 303.315683 |
等級
散乱 + 全体線形
$$ M_a = (9.879 + 2.972\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
モデル定数
| 項目 | 値 |
|---|---|
| H0 | 9.879 |
| n | 2.972 |
| gf | 1.000 |
| gb | -0.951 |
| 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 | -18.1068 | +14.720 |
| 2022-09-01 | 2024-12-10 | +15.3294 | -9.133 |
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) |
|---|---|---|---|---|
| 2026-02-03 00:00 | 06:33:52.92 | +05:28:02.3 | HIP 31246 | 10.05 |
| 2026-02-03 12:00 | 06:33:42.70 | +05:29:16.5 | HIP 31246 | 7.65 |
| 2026-02-04 00:00 | 06:33:32.68 | +05:30:31.5 | HIP 31246 | 5.71 |
| 2026-02-04 12:00 | 06:33:22.87 | +05:31:47.1 | HIP 31246 | 4.75 |
| 2026-02-05 00:00 | 06:33:13.26 | +05:33:03.4 | HIP 31246 | 5.27 |
| 2026-02-05 12:00 | 06:33:03.86 | +05:34:20.3 | HIP 31246 | 6.90 |
| 2026-02-06 00:00 | 06:32:54.67 | +05:35:38.0 | HIP 31246 | 9.02 |
| 2026-02-06 12:00 | 06:32:45.70 | +05:36:56.2 | HIP 31246 | 11.33 |
| 2026-02-07 00:00 | 06:32:36.93 | +05:38:15.1 | HIP 31246 | 13.71 |
| 2026-02-07 12:00 | 06:32:28.38 | +05:39:34.6 | HIP 31110 | 13.59 |
| 2026-02-08 00:00 | 06:32:20.05 | +05:40:54.6 | HIP 31110 | 11.14 |
| 2026-02-08 12:00 | 06:32:11.93 | +05:42:15.3 | HIP 31110 | 8.72 |
| 2026-02-09 00:00 | 06:32:04.03 | +05:43:36.5 | HIP 31110 | 6.37 |
| 2026-02-09 12:00 | 06:31:56.35 | +05:44:58.3 | HIP 31110 | 4.10 |
| 2026-02-10 00:00 | 06:31:48.89 | +05:46:20.6 | HIP 31110 | 2.09 |
| 2026-02-10 12:00 | 06:31:41.65 | +05:47:43.4 | HIP 31110 | 1.60 |
| 2026-02-11 00:00 | 06:31:34.64 | +05:49:06.7 | HIP 31109 | 3.21 |
| 2026-02-11 12:00 | 06:31:27.85 | +05:50:30.6 | HIP 31069 | 4.66 |
| 2026-02-12 00:00 | 06:31:21.28 | +05:51:54.9 | HIP 31069 | 2.61 |
| 2026-02-12 12:00 | 06:31:14.95 | +05:53:19.6 | HIP 31069 | 1.17 |
| 2026-02-13 00:00 | 06:31:08.83 | +05:54:44.8 | HIP 31069 | 2.20 |
| 2026-02-13 12:00 | 06:31:02.95 | +05:56:10.4 | HIP 31069 | 4.10 |
| 2026-02-14 00:00 | 06:30:57.30 | +05:57:36.5 | HIP 31069 | 6.06 |
| 2026-02-14 12:00 | 06:30:51.88 | +05:59:02.9 | HIP 31069 | 8.02 |
| 2026-02-15 00:00 | 06:30:46.69 | +06:00:29.8 | HIP 31019 | 9.14 |
| 2026-02-15 12:00 | 06:30:41.73 | +06:01:57.0 | HIP 31019 | 10.17 |
| 2026-02-16 00:00 | 06:30:37.00 | +06:03:24.5 | HIP 31019 | 11.43 |
| 2026-02-16 12:00 | 06:30:32.51 | +06:04:52.4 | HIP 31019 | 12.85 |
| 2026-02-17 00:00 | 06:30:28.25 | +06:06:20.7 | HIP 31019 | 14.37 |
| 2026-02-17 12:00 | 06:30:24.22 | +06:07:49.2 | HIP 31019 | 15.95 |
| 2026-02-18 00:00 | 06:30:20.43 | +06:09:18.0 | HIP 31019 | 17.56 |
| 2026-02-18 12:00 | 06:30:16.88 | +06:10:47.2 | HIP 31019 | 19.19 |
| 2026-02-19 00:00 | 06:30:13.56 | +06:12:16.5 | HIP 31019 | 20.82 |
| 2026-02-19 12:00 | 06:30:10.48 | +06:13:46.2 | HIP 30864 | 20.71 |
| 2026-02-20 00:00 | 06:30:07.64 | +06:15:16.0 | HIP 30864 | 20.19 |
| 2026-02-20 12:00 | 06:30:05.03 | +06:16:46.1 | HIP 30864 | 19.85 |
| 2026-02-21 00:00 | 06:30:02.66 | +06:18:16.4 | HIP 30864 | 19.71 |
| 2026-02-21 12:00 | 06:30:00.53 | +06:19:46.9 | HIP 30864 | 19.75 |
| 2026-02-22 00:00 | 06:29:58.64 | +06:21:17.5 | HIP 30864 | 19.97 |
| 2026-02-22 12:00 | 06:29:56.98 | +06:22:48.3 | HIP 30864 | 20.37 |
| 2026-02-23 00:00 | 06:29:55.56 | +06:24:19.3 | HIP 30864 | 20.92 |
| 2026-02-23 12:00 | 06:29:54.38 | +06:25:50.4 | HIP 30864 | 21.62 |
| 2026-02-24 00:00 | 06:29:53.44 | +06:27:21.6 | HIP 30864 | 22.45 |