メタデータ
| 項目 |
値 |
| Designation |
C/1951 G2 (Groeneveld-Palomar) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1950-07-11T23:45:37.175040Z |
| Orbit solution date (soln_date, UTC) |
2023-07-24T16:29:21Z |
| Obs used |
9 |
| NEO |
- |
| M1 |
5.900 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
1951-04-09T05:11:02.400000Z |
| Discovery magnitude (MPC) |
14.50 T |
| Discovery observatory (MPC) |
711 · McDonald Observatory, Fort Davis |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1951-04-14.0000000 |
| e |
1.00090094 |
| q (au) |
3.638504 |
| a (au) |
-4038.551574 |
| i (deg) |
170.654005 |
| Ω (om, deg) |
354.318294 |
| ω (w, deg) |
108.662689 |
| M (ma, deg) |
0.001060 |
等級
散乱 + 全体線形
$$
M_a = (4.160 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.160 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.566 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
05:51:07.39 |
+14:11:31.5 |
HIP 27618 |
9.47 |
| 2026-06-01 12:00 |
05:51:08.52 |
+14:11:32.6 |
HIP 27618 |
9.61 |
| 2026-06-02 00:00 |
05:51:09.66 |
+14:11:33.7 |
HIP 27618 |
9.75 |
| 2026-06-02 12:00 |
05:51:10.80 |
+14:11:34.8 |
HIP 27618 |
9.89 |
| 2026-06-03 00:00 |
05:51:11.94 |
+14:11:35.8 |
HIP 27618 |
10.04 |
| 2026-06-03 12:00 |
05:51:13.09 |
+14:11:36.9 |
HIP 27618 |
10.20 |
| 2026-06-04 00:00 |
05:51:14.24 |
+14:11:37.9 |
HIP 27618 |
10.36 |
| 2026-06-04 12:00 |
05:51:15.39 |
+14:11:38.9 |
HIP 27618 |
10.52 |
| 2026-06-05 00:00 |
05:51:16.54 |
+14:11:39.9 |
HIP 27618 |
10.69 |
| 2026-06-05 12:00 |
05:51:17.70 |
+14:11:40.8 |
HIP 27618 |
10.87 |
| 2026-06-06 00:00 |
05:51:18.85 |
+14:11:41.7 |
HIP 27618 |
11.05 |
| 2026-06-06 12:00 |
05:51:20.01 |
+14:11:42.6 |
HIP 27618 |
11.23 |
| 2026-06-07 00:00 |
05:51:21.18 |
+14:11:43.5 |
HIP 27618 |
11.42 |
| 2026-06-07 12:00 |
05:51:22.34 |
+14:11:44.4 |
HIP 27618 |
11.61 |
| 2026-06-08 00:00 |
05:51:23.51 |
+14:11:45.2 |
HIP 27618 |
11.80 |
| 2026-06-08 12:00 |
05:51:24.68 |
+14:11:46.0 |
HIP 27618 |
12.00 |
| 2026-06-09 00:00 |
05:51:25.85 |
+14:11:46.8 |
HIP 27618 |
12.21 |
| 2026-06-09 12:00 |
05:51:27.02 |
+14:11:47.5 |
HIP 27618 |
12.41 |
| 2026-06-10 00:00 |
05:51:28.19 |
+14:11:48.3 |
HIP 27618 |
12.62 |
| 2026-06-10 12:00 |
05:51:29.37 |
+14:11:49.0 |
HIP 27618 |
12.83 |
| 2026-06-11 00:00 |
05:51:30.55 |
+14:11:49.7 |
HIP 27743 |
12.64 |
| 2026-06-11 12:00 |
05:51:31.73 |
+14:11:50.3 |
HIP 27743 |
12.35 |
| 2026-06-12 00:00 |
05:51:32.91 |
+14:11:50.9 |
HIP 27743 |
12.07 |
| 2026-06-12 12:00 |
05:51:34.09 |
+14:11:51.6 |
HIP 27743 |
11.79 |
| 2026-06-13 00:00 |
05:51:35.27 |
+14:11:52.1 |
HIP 27743 |
11.51 |
| 2026-06-13 12:00 |
05:51:36.46 |
+14:11:52.7 |
HIP 27743 |
11.22 |
| 2026-06-14 00:00 |
05:51:37.64 |
+14:11:53.3 |
HIP 27743 |
10.94 |
| 2026-06-14 12:00 |
05:51:38.83 |
+14:11:53.8 |
HIP 27743 |
10.66 |
| 2026-06-15 00:00 |
05:51:40.02 |
+14:11:54.3 |
HIP 27743 |
10.37 |
| 2026-06-15 12:00 |
05:51:41.20 |
+14:11:54.7 |
HIP 27743 |
10.09 |
| 2026-06-16 00:00 |
05:51:42.39 |
+14:11:55.2 |
HIP 27743 |
9.81 |
| 2026-06-16 12:00 |
05:51:43.58 |
+14:11:55.6 |
HIP 27743 |
9.52 |
| 2026-06-17 00:00 |
05:51:44.77 |
+14:11:56.0 |
HIP 27743 |
9.24 |
| 2026-06-17 12:00 |
05:51:45.96 |
+14:11:56.3 |
HIP 27743 |
8.96 |
| 2026-06-18 00:00 |
05:51:47.15 |
+14:11:56.7 |
HIP 27743 |
8.68 |
| 2026-06-18 12:00 |
05:51:48.34 |
+14:11:57.0 |
HIP 27743 |
8.39 |
| 2026-06-19 00:00 |
05:51:49.53 |
+14:11:57.3 |
HIP 27743 |
8.11 |
| 2026-06-19 12:00 |
05:51:50.72 |
+14:11:57.6 |
HIP 27743 |
7.83 |
| 2026-06-20 00:00 |
05:51:51.91 |
+14:11:57.8 |
HIP 27743 |
7.55 |
| 2026-06-20 12:00 |
05:51:53.11 |
+14:11:58.0 |
HIP 27743 |
7.27 |
| 2026-06-21 00:00 |
05:51:54.30 |
+14:11:58.2 |
HIP 27743 |
6.99 |
| 2026-06-21 12:00 |
05:51:55.49 |
+14:11:58.4 |
HIP 27743 |
6.71 |
| 2026-06-22 00:00 |
05:51:56.68 |
+14:11:58.5 |
HIP 27743 |
6.43 |