メタデータ
| 項目 |
値 |
| Designation |
C/1932 P1 (Peltier-Whipple) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1932-09-01T20:28:52.584960Z |
| Orbit solution date (soln_date, UTC) |
2023-12-04T20:32:29Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
38.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1932-08-31.0000000 |
| e |
0.97689337 |
| q (au) |
1.037233 |
| a (au) |
44.888968 |
| i (deg) |
71.723285 |
| Ω (om, deg) |
345.466351 |
| ω (w, deg) |
38.467110 |
| M (ma, deg) |
359.993926 |
等級
散乱 + 全体線形
$$
M_a = (7.490 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.490 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-05-12 00:00 |
10:52:17.96 |
-28:40:40.0 |
HIP 53221 |
21.28 |
| 2026-05-12 12:00 |
10:52:17.40 |
-28:40:26.0 |
HIP 53221 |
21.15 |
| 2026-05-13 00:00 |
10:52:16.85 |
-28:40:12.0 |
HIP 53221 |
21.02 |
| 2026-05-13 12:00 |
10:52:16.32 |
-28:39:58.0 |
HIP 53221 |
20.89 |
| 2026-05-14 00:00 |
10:52:15.80 |
-28:39:44.0 |
HIP 53221 |
20.76 |
| 2026-05-14 12:00 |
10:52:15.29 |
-28:39:30.1 |
HIP 53221 |
20.63 |
| 2026-05-15 00:00 |
10:52:14.79 |
-28:39:16.1 |
HIP 53221 |
20.51 |
| 2026-05-15 12:00 |
10:52:14.30 |
-28:39:02.2 |
HIP 53221 |
20.38 |
| 2026-05-16 00:00 |
10:52:13.83 |
-28:38:48.3 |
HIP 53221 |
20.26 |
| 2026-05-16 12:00 |
10:52:13.37 |
-28:38:34.5 |
HIP 53221 |
20.14 |
| 2026-05-17 00:00 |
10:52:12.93 |
-28:38:20.7 |
HIP 53221 |
20.02 |
| 2026-05-17 12:00 |
10:52:12.49 |
-28:38:06.9 |
HIP 53221 |
19.90 |
| 2026-05-18 00:00 |
10:52:12.07 |
-28:37:53.1 |
HIP 53221 |
19.78 |
| 2026-05-18 12:00 |
10:52:11.66 |
-28:37:39.3 |
HIP 53221 |
19.66 |
| 2026-05-19 00:00 |
10:52:11.27 |
-28:37:25.6 |
HIP 53221 |
19.54 |
| 2026-05-19 12:00 |
10:52:10.89 |
-28:37:11.9 |
HIP 53221 |
19.43 |
| 2026-05-20 00:00 |
10:52:10.52 |
-28:36:58.3 |
HIP 53221 |
19.31 |
| 2026-05-20 12:00 |
10:52:10.16 |
-28:36:44.7 |
HIP 53221 |
19.20 |
| 2026-05-21 00:00 |
10:52:09.82 |
-28:36:31.1 |
HIP 53221 |
19.08 |
| 2026-05-21 12:00 |
10:52:09.48 |
-28:36:17.6 |
HIP 53221 |
18.97 |
| 2026-05-22 00:00 |
10:52:09.17 |
-28:36:04.1 |
HIP 53221 |
18.86 |
| 2026-05-22 12:00 |
10:52:08.86 |
-28:35:50.6 |
HIP 53221 |
18.75 |
| 2026-05-23 00:00 |
10:52:08.57 |
-28:35:37.2 |
HIP 53221 |
18.64 |
| 2026-05-23 12:00 |
10:52:08.29 |
-28:35:23.8 |
HIP 53221 |
18.53 |
| 2026-05-24 00:00 |
10:52:08.02 |
-28:35:10.4 |
HIP 53221 |
18.42 |
| 2026-05-24 12:00 |
10:52:07.77 |
-28:34:57.1 |
HIP 53221 |
18.31 |
| 2026-05-25 00:00 |
10:52:07.53 |
-28:34:43.9 |
HIP 53221 |
18.20 |
| 2026-05-25 12:00 |
10:52:07.30 |
-28:34:30.7 |
HIP 53221 |
18.09 |
| 2026-05-26 00:00 |
10:52:07.09 |
-28:34:17.5 |
HIP 53221 |
17.99 |
| 2026-05-26 12:00 |
10:52:06.88 |
-28:34:04.4 |
HIP 53221 |
17.88 |
| 2026-05-27 00:00 |
10:52:06.70 |
-28:33:51.3 |
HIP 53221 |
17.77 |
| 2026-05-27 12:00 |
10:52:06.52 |
-28:33:38.3 |
HIP 53221 |
17.67 |
| 2026-05-28 00:00 |
10:52:06.36 |
-28:33:25.3 |
HIP 53221 |
17.56 |
| 2026-05-28 12:00 |
10:52:06.21 |
-28:33:12.4 |
HIP 53221 |
17.46 |
| 2026-05-29 00:00 |
10:52:06.07 |
-28:32:59.5 |
HIP 53221 |
17.35 |
| 2026-05-29 12:00 |
10:52:05.94 |
-28:32:46.6 |
HIP 53221 |
17.25 |
| 2026-05-30 00:00 |
10:52:05.83 |
-28:32:33.9 |
HIP 53221 |
17.14 |
| 2026-05-30 12:00 |
10:52:05.73 |
-28:32:21.1 |
HIP 53221 |
17.04 |
| 2026-05-31 00:00 |
10:52:05.65 |
-28:32:08.5 |
HIP 53221 |
16.94 |
| 2026-05-31 12:00 |
10:52:05.58 |
-28:31:55.9 |
HIP 53221 |
16.83 |
| 2026-06-01 00:00 |
10:52:05.52 |
-28:31:43.3 |
HIP 53221 |
16.73 |
| 2026-06-01 12:00 |
10:52:05.47 |
-28:31:30.8 |
HIP 53221 |
16.63 |
| 2026-06-02 00:00 |
10:52:05.43 |
-28:31:18.3 |
HIP 53221 |
16.52 |