メタデータ
| 項目 |
値 |
| Designation |
C/1963 R1 (Pereyra) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1963-08-23T23:19:43.055040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
12 |
| 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) |
1963-10-25.0000000 |
| e |
0.99994492 |
| q (au) |
0.005021 |
| a (au) |
91.149463 |
| i (deg) |
144.594816 |
| Ω (om, deg) |
8.051859 |
| ω (w, deg) |
86.230920 |
| M (ma, deg) |
0.070252 |
等級
散乱 + 全体線形
$$
M_a = (4.625 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.625 |
| n |
6.000 |
| gf |
1.000 |
| 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 |
06:46:02.75 |
-12:01:05.2 |
HIP 32513 |
19.10 |
| 2026-07-29 12:00 |
06:46:04.09 |
-12:01:11.9 |
HIP 32513 |
18.77 |
| 2026-07-30 00:00 |
06:46:05.42 |
-12:01:18.8 |
HIP 32513 |
18.44 |
| 2026-07-30 12:00 |
06:46:06.75 |
-12:01:25.7 |
HIP 32513 |
18.11 |
| 2026-07-31 00:00 |
06:46:08.07 |
-12:01:32.7 |
HIP 32513 |
17.77 |
| 2026-07-31 12:00 |
06:46:09.39 |
-12:01:39.7 |
HIP 32513 |
17.44 |
| 2026-08-01 00:00 |
06:46:10.70 |
-12:01:46.9 |
HIP 32513 |
17.12 |
| 2026-08-01 12:00 |
06:46:12.01 |
-12:01:54.2 |
HIP 32513 |
16.79 |
| 2026-08-02 00:00 |
06:46:13.31 |
-12:02:01.5 |
HIP 32513 |
16.46 |
| 2026-08-02 12:00 |
06:46:14.60 |
-12:02:08.9 |
HIP 32513 |
16.13 |
| 2026-08-03 00:00 |
06:46:15.89 |
-12:02:16.5 |
HIP 32513 |
15.81 |
| 2026-08-03 12:00 |
06:46:17.17 |
-12:02:24.1 |
HIP 32513 |
15.48 |
| 2026-08-04 00:00 |
06:46:18.45 |
-12:02:31.8 |
HIP 32513 |
15.16 |
| 2026-08-04 12:00 |
06:46:19.72 |
-12:02:39.5 |
HIP 32513 |
14.83 |
| 2026-08-05 00:00 |
06:46:20.98 |
-12:02:47.4 |
HIP 32513 |
14.51 |
| 2026-08-05 12:00 |
06:46:22.23 |
-12:02:55.4 |
HIP 32513 |
14.19 |
| 2026-08-06 00:00 |
06:46:23.48 |
-12:03:03.4 |
HIP 32513 |
13.87 |
| 2026-08-06 12:00 |
06:46:24.73 |
-12:03:11.5 |
HIP 32513 |
13.55 |
| 2026-08-07 00:00 |
06:46:25.96 |
-12:03:19.7 |
HIP 32513 |
13.23 |
| 2026-08-07 12:00 |
06:46:27.19 |
-12:03:28.0 |
HIP 32513 |
12.91 |
| 2026-08-08 00:00 |
06:46:28.42 |
-12:03:36.4 |
HIP 32513 |
12.60 |
| 2026-08-08 12:00 |
06:46:29.63 |
-12:03:44.8 |
HIP 32513 |
12.28 |
| 2026-08-09 00:00 |
06:46:30.84 |
-12:03:53.4 |
HIP 32513 |
11.97 |
| 2026-08-09 12:00 |
06:46:32.04 |
-12:04:02.0 |
HIP 32513 |
11.65 |
| 2026-08-10 00:00 |
06:46:33.24 |
-12:04:10.7 |
HIP 32513 |
11.34 |
| 2026-08-10 12:00 |
06:46:34.42 |
-12:04:19.4 |
HIP 32513 |
11.03 |
| 2026-08-11 00:00 |
06:46:35.60 |
-12:04:28.3 |
HIP 32513 |
10.72 |
| 2026-08-11 12:00 |
06:46:36.77 |
-12:04:37.2 |
HIP 32513 |
10.41 |
| 2026-08-12 00:00 |
06:46:37.94 |
-12:04:46.2 |
HIP 32513 |
10.10 |
| 2026-08-12 12:00 |
06:46:39.10 |
-12:04:55.3 |
HIP 32513 |
9.80 |
| 2026-08-13 00:00 |
06:46:40.24 |
-12:05:04.5 |
HIP 32513 |
9.49 |
| 2026-08-13 12:00 |
06:46:41.38 |
-12:05:13.7 |
HIP 32513 |
9.19 |
| 2026-08-14 00:00 |
06:46:42.52 |
-12:05:23.0 |
HIP 32513 |
8.89 |
| 2026-08-14 12:00 |
06:46:43.64 |
-12:05:32.4 |
HIP 32513 |
8.59 |
| 2026-08-15 00:00 |
06:46:44.76 |
-12:05:41.9 |
HIP 32513 |
8.29 |
| 2026-08-15 12:00 |
06:46:45.87 |
-12:05:51.4 |
HIP 32513 |
7.99 |
| 2026-08-16 00:00 |
06:46:46.96 |
-12:06:01.1 |
HIP 32513 |
7.70 |
| 2026-08-16 12:00 |
06:46:48.06 |
-12:06:10.7 |
HIP 32513 |
7.40 |
| 2026-08-17 00:00 |
06:46:49.14 |
-12:06:20.5 |
HIP 32513 |
7.11 |
| 2026-08-17 12:00 |
06:46:50.21 |
-12:06:30.3 |
HIP 32513 |
6.82 |
| 2026-08-18 00:00 |
06:46:51.28 |
-12:06:40.2 |
HIP 32513 |
6.53 |
| 2026-08-18 12:00 |
06:46:52.33 |
-12:06:50.2 |
HIP 32513 |
6.25 |
| 2026-08-19 00:00 |
06:46:53.38 |
-12:07:00.2 |
HIP 32513 |
5.96 |