メタデータ
| 項目 |
値 |
| Designation |
C/1951 P1 (Wilson-Harrington) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1952-01-12T22:44:16.137600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:09Z |
| Obs used |
23 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
14.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1951-09-13.0000000 |
| e |
0.99977514 |
| q (au) |
0.740399 |
| a (au) |
3292.688104 |
| i (deg) |
152.531339 |
| Ω (om, deg) |
76.894641 |
| ω (w, deg) |
269.622126 |
| M (ma, deg) |
359.999364 |
等級
散乱 + 全体線形
$$
M_a = (8.987 + 3.458\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.987 |
| n |
3.458 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.876 |
| δ90 |
1.000 |
| 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 |
23:11:13.94 |
+23:57:55.3 |
HIP 114467 |
20.47 |
| 2026-05-12 12:00 |
23:11:14.45 |
+23:58:05.7 |
HIP 114467 |
20.32 |
| 2026-05-13 00:00 |
23:11:14.96 |
+23:58:16.1 |
HIP 114467 |
20.18 |
| 2026-05-13 12:00 |
23:11:15.45 |
+23:58:26.4 |
HIP 114467 |
20.03 |
| 2026-05-14 00:00 |
23:11:15.94 |
+23:58:36.7 |
HIP 114467 |
19.89 |
| 2026-05-14 12:00 |
23:11:16.42 |
+23:58:47.1 |
HIP 114467 |
19.75 |
| 2026-05-15 00:00 |
23:11:16.89 |
+23:58:57.4 |
HIP 114467 |
19.61 |
| 2026-05-15 12:00 |
23:11:17.34 |
+23:59:07.7 |
HIP 114467 |
19.47 |
| 2026-05-16 00:00 |
23:11:17.79 |
+23:59:17.9 |
HIP 114467 |
19.33 |
| 2026-05-16 12:00 |
23:11:18.23 |
+23:59:28.2 |
HIP 114467 |
19.19 |
| 2026-05-17 00:00 |
23:11:18.66 |
+23:59:38.4 |
HIP 114467 |
19.05 |
| 2026-05-17 12:00 |
23:11:19.08 |
+23:59:48.6 |
HIP 114467 |
18.92 |
| 2026-05-18 00:00 |
23:11:19.49 |
+23:59:58.8 |
HIP 114467 |
18.78 |
| 2026-05-18 12:00 |
23:11:19.90 |
+24:00:09.0 |
HIP 114467 |
18.65 |
| 2026-05-19 00:00 |
23:11:20.29 |
+24:00:19.1 |
HIP 114467 |
18.51 |
| 2026-05-19 12:00 |
23:11:20.67 |
+24:00:29.2 |
HIP 114467 |
18.38 |
| 2026-05-20 00:00 |
23:11:21.04 |
+24:00:39.3 |
HIP 114467 |
18.24 |
| 2026-05-20 12:00 |
23:11:21.41 |
+24:00:49.4 |
HIP 114467 |
18.11 |
| 2026-05-21 00:00 |
23:11:21.76 |
+24:00:59.4 |
HIP 114467 |
17.98 |
| 2026-05-21 12:00 |
23:11:22.10 |
+24:01:09.4 |
HIP 114467 |
17.85 |
| 2026-05-22 00:00 |
23:11:22.44 |
+24:01:19.4 |
HIP 114467 |
17.72 |
| 2026-05-22 12:00 |
23:11:22.76 |
+24:01:29.4 |
HIP 114467 |
17.59 |
| 2026-05-23 00:00 |
23:11:23.08 |
+24:01:39.3 |
HIP 114467 |
17.46 |
| 2026-05-23 12:00 |
23:11:23.38 |
+24:01:49.2 |
HIP 114467 |
17.33 |
| 2026-05-24 00:00 |
23:11:23.68 |
+24:01:59.1 |
HIP 114467 |
17.20 |
| 2026-05-24 12:00 |
23:11:23.96 |
+24:02:08.9 |
HIP 114467 |
17.07 |
| 2026-05-25 00:00 |
23:11:24.24 |
+24:02:18.7 |
HIP 114467 |
16.95 |
| 2026-05-25 12:00 |
23:11:24.50 |
+24:02:28.5 |
HIP 114467 |
16.82 |
| 2026-05-26 00:00 |
23:11:24.76 |
+24:02:38.2 |
HIP 114467 |
16.69 |
| 2026-05-26 12:00 |
23:11:25.00 |
+24:02:48.0 |
HIP 114467 |
16.57 |
| 2026-05-27 00:00 |
23:11:25.24 |
+24:02:57.6 |
HIP 114467 |
16.44 |
| 2026-05-27 12:00 |
23:11:25.47 |
+24:03:07.3 |
HIP 114467 |
16.32 |
| 2026-05-28 00:00 |
23:11:25.68 |
+24:03:16.9 |
HIP 114467 |
16.19 |
| 2026-05-28 12:00 |
23:11:25.89 |
+24:03:26.5 |
HIP 114467 |
16.07 |
| 2026-05-29 00:00 |
23:11:26.08 |
+24:03:36.0 |
HIP 114467 |
15.94 |
| 2026-05-29 12:00 |
23:11:26.27 |
+24:03:45.5 |
HIP 114467 |
15.82 |
| 2026-05-30 00:00 |
23:11:26.45 |
+24:03:54.9 |
HIP 114467 |
15.70 |
| 2026-05-30 12:00 |
23:11:26.61 |
+24:04:04.4 |
HIP 114467 |
15.57 |
| 2026-05-31 00:00 |
23:11:26.77 |
+24:04:13.7 |
HIP 114467 |
15.45 |
| 2026-05-31 12:00 |
23:11:26.92 |
+24:04:23.1 |
HIP 114467 |
15.33 |
| 2026-06-01 00:00 |
23:11:27.05 |
+24:04:32.4 |
HIP 114467 |
15.20 |
| 2026-06-01 12:00 |
23:11:27.18 |
+24:04:41.7 |
HIP 114467 |
15.08 |
| 2026-06-02 00:00 |
23:11:27.30 |
+24:04:50.9 |
HIP 114467 |
14.96 |