メタデータ
| 項目 |
値 |
| Designation |
C/1964 P1 (Everhart) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1964-08-23T04:28:19.128000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:16Z |
| Obs used |
40 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1964-10-14.0000000 |
| e |
0.99649619 |
| q (au) |
1.259279 |
| a (au) |
359.402401 |
| i (deg) |
67.969012 |
| Ω (om, deg) |
280.445182 |
| ω (w, deg) |
20.685810 |
| M (ma, deg) |
0.007495 |
等級
散乱 + 全体線形
$$
M_a = (5.997 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.997 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.998 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
06:55:50.49 |
+15:41:40.4 |
HIP 33279 |
7.42 |
| 2026-07-29 12:00 |
06:55:51.80 |
+15:41:37.2 |
HIP 33279 |
7.73 |
| 2026-07-30 00:00 |
06:55:53.11 |
+15:41:34.0 |
HIP 33279 |
8.04 |
| 2026-07-30 12:00 |
06:55:54.41 |
+15:41:30.8 |
HIP 33279 |
8.34 |
| 2026-07-31 00:00 |
06:55:55.70 |
+15:41:27.6 |
HIP 33279 |
8.65 |
| 2026-07-31 12:00 |
06:55:57.00 |
+15:41:24.3 |
HIP 33279 |
8.96 |
| 2026-08-01 00:00 |
06:55:58.28 |
+15:41:21.1 |
HIP 33279 |
9.26 |
| 2026-08-01 12:00 |
06:55:59.56 |
+15:41:17.8 |
HIP 33279 |
9.56 |
| 2026-08-02 00:00 |
06:56:00.84 |
+15:41:14.5 |
HIP 33279 |
9.87 |
| 2026-08-02 12:00 |
06:56:02.11 |
+15:41:11.2 |
HIP 33279 |
10.17 |
| 2026-08-03 00:00 |
06:56:03.37 |
+15:41:07.9 |
HIP 33279 |
10.47 |
| 2026-08-03 12:00 |
06:56:04.63 |
+15:41:04.6 |
HIP 33279 |
10.77 |
| 2026-08-04 00:00 |
06:56:05.89 |
+15:41:01.3 |
HIP 33279 |
11.08 |
| 2026-08-04 12:00 |
06:56:07.14 |
+15:40:57.9 |
HIP 33279 |
11.37 |
| 2026-08-05 00:00 |
06:56:08.38 |
+15:40:54.5 |
HIP 33279 |
11.67 |
| 2026-08-05 12:00 |
06:56:09.62 |
+15:40:51.2 |
HIP 33279 |
11.97 |
| 2026-08-06 00:00 |
06:56:10.85 |
+15:40:47.8 |
HIP 33279 |
12.27 |
| 2026-08-06 12:00 |
06:56:12.07 |
+15:40:44.4 |
HIP 33279 |
12.56 |
| 2026-08-07 00:00 |
06:56:13.29 |
+15:40:41.0 |
HIP 33279 |
12.85 |
| 2026-08-07 12:00 |
06:56:14.51 |
+15:40:37.6 |
HIP 33279 |
13.15 |
| 2026-08-08 00:00 |
06:56:15.71 |
+15:40:34.2 |
HIP 33279 |
13.44 |
| 2026-08-08 12:00 |
06:56:16.91 |
+15:40:30.7 |
HIP 33279 |
13.73 |
| 2026-08-09 00:00 |
06:56:18.11 |
+15:40:27.3 |
HIP 33279 |
14.02 |
| 2026-08-09 12:00 |
06:56:19.30 |
+15:40:23.8 |
HIP 33279 |
14.30 |
| 2026-08-10 00:00 |
06:56:20.48 |
+15:40:20.4 |
HIP 33279 |
14.59 |
| 2026-08-10 12:00 |
06:56:21.65 |
+15:40:16.9 |
HIP 33279 |
14.87 |
| 2026-08-11 00:00 |
06:56:22.82 |
+15:40:13.4 |
HIP 33279 |
15.16 |
| 2026-08-11 12:00 |
06:56:23.98 |
+15:40:09.9 |
HIP 33279 |
15.44 |
| 2026-08-12 00:00 |
06:56:25.13 |
+15:40:06.4 |
HIP 33279 |
15.72 |
| 2026-08-12 12:00 |
06:56:26.28 |
+15:40:02.9 |
HIP 33279 |
16.00 |
| 2026-08-13 00:00 |
06:56:27.42 |
+15:39:59.4 |
HIP 33279 |
16.27 |
| 2026-08-13 12:00 |
06:56:28.55 |
+15:39:55.9 |
HIP 33279 |
16.55 |
| 2026-08-14 00:00 |
06:56:29.68 |
+15:39:52.3 |
HIP 33279 |
16.82 |
| 2026-08-14 12:00 |
06:56:30.80 |
+15:39:48.8 |
HIP 33279 |
17.09 |
| 2026-08-15 00:00 |
06:56:31.91 |
+15:39:45.2 |
HIP 33279 |
17.36 |
| 2026-08-15 12:00 |
06:56:33.01 |
+15:39:41.7 |
HIP 33279 |
17.63 |
| 2026-08-16 00:00 |
06:56:34.11 |
+15:39:38.1 |
HIP 33279 |
17.90 |
| 2026-08-16 12:00 |
06:56:35.19 |
+15:39:34.6 |
HIP 33279 |
18.17 |
| 2026-08-17 00:00 |
06:56:36.27 |
+15:39:31.0 |
HIP 33279 |
18.43 |
| 2026-08-17 12:00 |
06:56:37.35 |
+15:39:27.4 |
HIP 33279 |
18.69 |
| 2026-08-18 00:00 |
06:56:38.41 |
+15:39:23.8 |
HIP 33279 |
18.95 |
| 2026-08-18 12:00 |
06:56:39.47 |
+15:39:20.2 |
HIP 33279 |
19.21 |
| 2026-08-19 00:00 |
06:56:40.51 |
+15:39:16.6 |
HIP 33279 |
19.46 |