メタデータ
| 項目 |
値 |
| Designation |
C/2013 P3 (Palomar) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-11-23T23:00:50.428800Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:38Z |
| Obs used |
492 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
8.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-09-07.0000000 |
| e |
1.00115594 |
| q (au) |
8.646522 |
| a (au) |
-7480.047055 |
| i (deg) |
93.906204 |
| Ω (om, deg) |
177.275808 |
| ω (w, deg) |
177.190714 |
| M (ma, deg) |
-0.000119 |
等級
散乱 + 全体線形
$$
M_a = (2.034 + 4.864\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.034 |
| n |
4.864 |
| gf |
0.997 |
| gb |
-0.942 |
| k |
1.000 |
| δ90 |
9.998 |
| 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 |
07:41:42.43 |
-65:44:51.2 |
HIP 37496 |
2.55 |
| 2026-05-12 12:00 |
07:41:50.12 |
-65:43:37.2 |
HIP 37496 |
3.78 |
| 2026-05-13 00:00 |
07:41:57.89 |
-65:42:23.4 |
HIP 37496 |
5.14 |
| 2026-05-13 12:00 |
07:42:05.73 |
-65:41:10.0 |
HIP 37496 |
6.54 |
| 2026-05-14 00:00 |
07:42:13.65 |
-65:39:56.8 |
HIP 37496 |
7.96 |
| 2026-05-14 12:00 |
07:42:21.65 |
-65:38:44.0 |
HIP 37516 |
7.94 |
| 2026-05-15 00:00 |
07:42:29.73 |
-65:37:31.5 |
HIP 37516 |
7.11 |
| 2026-05-15 12:00 |
07:42:37.88 |
-65:36:19.3 |
HIP 37516 |
6.52 |
| 2026-05-16 00:00 |
07:42:46.10 |
-65:35:07.4 |
HIP 37516 |
6.24 |
| 2026-05-16 12:00 |
07:42:54.40 |
-65:33:55.9 |
HIP 37516 |
6.30 |
| 2026-05-17 00:00 |
07:43:02.78 |
-65:32:44.7 |
HIP 37516 |
6.71 |
| 2026-05-17 12:00 |
07:43:11.22 |
-65:31:33.9 |
HIP 37516 |
7.40 |
| 2026-05-18 00:00 |
07:43:19.74 |
-65:30:23.4 |
HIP 37516 |
8.30 |
| 2026-05-18 12:00 |
07:43:28.34 |
-65:29:13.2 |
HIP 37516 |
9.36 |
| 2026-05-19 00:00 |
07:43:37.00 |
-65:28:03.4 |
HIP 37516 |
10.52 |
| 2026-05-19 12:00 |
07:43:45.73 |
-65:26:54.0 |
HIP 37516 |
11.75 |
| 2026-05-20 00:00 |
07:43:54.54 |
-65:25:44.9 |
HIP 37516 |
13.05 |
| 2026-05-20 12:00 |
07:44:03.41 |
-65:24:36.2 |
HIP 37516 |
14.38 |
| 2026-05-21 00:00 |
07:44:12.35 |
-65:23:27.9 |
HIP 37516 |
15.73 |
| 2026-05-21 12:00 |
07:44:21.36 |
-65:22:19.9 |
HIP 37516 |
17.12 |
| 2026-05-22 00:00 |
07:44:30.44 |
-65:21:12.3 |
HIP 37516 |
18.51 |
| 2026-05-22 12:00 |
07:44:39.58 |
-65:20:05.1 |
HIP 37516 |
19.93 |
| 2026-05-23 00:00 |
07:44:48.79 |
-65:18:58.2 |
HIP 37516 |
21.35 |
| 2026-05-23 12:00 |
07:44:58.07 |
-65:17:51.8 |
HIP 37516 |
22.78 |
| 2026-05-24 00:00 |
07:45:07.41 |
-65:16:45.7 |
HIP 37516 |
24.22 |
| 2026-05-24 12:00 |
07:45:16.81 |
-65:15:40.0 |
HIP 37516 |
25.66 |
| 2026-05-25 00:00 |
07:45:26.28 |
-65:14:34.8 |
HIP 37516 |
27.11 |
| 2026-05-25 12:00 |
07:45:35.80 |
-65:13:29.9 |
HIP 37859 |
27.98 |
| 2026-05-26 00:00 |
07:45:45.40 |
-65:12:25.4 |
HIP 37859 |
26.91 |
| 2026-05-26 12:00 |
07:45:55.05 |
-65:11:21.3 |
HIP 37859 |
25.89 |
| 2026-05-27 00:00 |
07:46:04.76 |
-65:10:17.6 |
HIP 37859 |
24.92 |
| 2026-05-27 12:00 |
07:46:14.54 |
-65:09:14.3 |
HIP 37859 |
24.02 |
| 2026-05-28 00:00 |
07:46:24.37 |
-65:08:11.5 |
HIP 37859 |
23.17 |
| 2026-05-28 12:00 |
07:46:34.26 |
-65:07:09.0 |
HIP 37859 |
22.41 |
| 2026-05-29 00:00 |
07:46:44.21 |
-65:06:07.0 |
HIP 37859 |
21.72 |
| 2026-05-29 12:00 |
07:46:54.22 |
-65:05:05.4 |
HIP 37859 |
21.13 |
| 2026-05-30 00:00 |
07:47:04.29 |
-65:04:04.2 |
HIP 37859 |
20.63 |
| 2026-05-30 12:00 |
07:47:14.41 |
-65:03:03.4 |
HIP 37859 |
20.24 |
| 2026-05-31 00:00 |
07:47:24.59 |
-65:02:03.0 |
HIP 37859 |
19.96 |
| 2026-05-31 12:00 |
07:47:34.82 |
-65:01:03.1 |
HIP 37859 |
19.80 |
| 2026-06-01 00:00 |
07:47:45.11 |
-65:00:03.6 |
HIP 37859 |
19.76 |
| 2026-06-01 12:00 |
07:47:55.46 |
-64:59:04.5 |
HIP 37859 |
19.83 |
| 2026-06-02 00:00 |
07:48:05.86 |
-64:58:05.9 |
HIP 37859 |
20.03 |