メタデータ
| 項目 |
値 |
| Designation |
C/1957 U1 (Latyshev-Wild-Burnham) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1957-12-05T03:06:11.520000Z |
| Orbit solution date (soln_date, UTC) |
- |
| Obs used |
9 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1957-12-05.1293000 |
| e |
1.00000000 |
| q (au) |
0.539130 |
| a (au) |
- |
| i (deg) |
156.715400 |
| Ω (om, deg) |
210.875300 |
| ω (w, deg) |
277.613800 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (11.780 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.780 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.525 |
| k |
0.800 |
| 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 |
08:44:44.94 |
+41:57:48.5 |
HIP 42876 |
9.88 |
| 2026-07-29 12:00 |
08:44:46.52 |
+41:57:43.8 |
HIP 42876 |
10.11 |
| 2026-07-30 00:00 |
08:44:48.10 |
+41:57:39.2 |
HIP 42876 |
10.35 |
| 2026-07-30 12:00 |
08:44:49.67 |
+41:57:34.6 |
HIP 42876 |
10.58 |
| 2026-07-31 00:00 |
08:44:51.25 |
+41:57:30.1 |
HIP 42876 |
10.82 |
| 2026-07-31 12:00 |
08:44:52.83 |
+41:57:25.7 |
HIP 42876 |
11.06 |
| 2026-08-01 00:00 |
08:44:54.41 |
+41:57:21.3 |
HIP 42876 |
11.30 |
| 2026-08-01 12:00 |
08:44:55.99 |
+41:57:17.0 |
HIP 42876 |
11.55 |
| 2026-08-02 00:00 |
08:44:57.57 |
+41:57:12.7 |
HIP 42876 |
11.79 |
| 2026-08-02 12:00 |
08:44:59.15 |
+41:57:08.5 |
HIP 42876 |
12.04 |
| 2026-08-03 00:00 |
08:45:00.73 |
+41:57:04.4 |
HIP 42876 |
12.29 |
| 2026-08-03 12:00 |
08:45:02.31 |
+41:57:00.3 |
HIP 42876 |
12.54 |
| 2026-08-04 00:00 |
08:45:03.89 |
+41:56:56.3 |
HIP 42876 |
12.79 |
| 2026-08-04 12:00 |
08:45:05.47 |
+41:56:52.4 |
HIP 42876 |
13.05 |
| 2026-08-05 00:00 |
08:45:07.05 |
+41:56:48.5 |
HIP 42876 |
13.30 |
| 2026-08-05 12:00 |
08:45:08.62 |
+41:56:44.7 |
HIP 42876 |
13.56 |
| 2026-08-06 00:00 |
08:45:10.20 |
+41:56:40.9 |
HIP 42876 |
13.82 |
| 2026-08-06 12:00 |
08:45:11.77 |
+41:56:37.2 |
HIP 42876 |
14.07 |
| 2026-08-07 00:00 |
08:45:13.35 |
+41:56:33.6 |
HIP 42876 |
14.33 |
| 2026-08-07 12:00 |
08:45:14.92 |
+41:56:30.1 |
HIP 42876 |
14.59 |
| 2026-08-08 00:00 |
08:45:16.49 |
+41:56:26.6 |
HIP 42876 |
14.85 |
| 2026-08-08 12:00 |
08:45:18.06 |
+41:56:23.1 |
HIP 42876 |
15.11 |
| 2026-08-09 00:00 |
08:45:19.63 |
+41:56:19.8 |
HIP 42876 |
15.37 |
| 2026-08-09 12:00 |
08:45:21.19 |
+41:56:16.5 |
HIP 42876 |
15.63 |
| 2026-08-10 00:00 |
08:45:22.76 |
+41:56:13.3 |
HIP 42876 |
15.89 |
| 2026-08-10 12:00 |
08:45:24.32 |
+41:56:10.1 |
HIP 42940 |
15.97 |
| 2026-08-11 00:00 |
08:45:25.88 |
+41:56:07.0 |
HIP 42940 |
15.97 |
| 2026-08-11 12:00 |
08:45:27.44 |
+41:56:04.0 |
HIP 42940 |
15.97 |
| 2026-08-12 00:00 |
08:45:29.00 |
+41:56:01.0 |
HIP 42940 |
15.98 |
| 2026-08-12 12:00 |
08:45:30.55 |
+41:55:58.1 |
HIP 42940 |
16.00 |
| 2026-08-13 00:00 |
08:45:32.10 |
+41:55:55.3 |
HIP 42940 |
16.03 |
| 2026-08-13 12:00 |
08:45:33.65 |
+41:55:52.6 |
HIP 42940 |
16.06 |
| 2026-08-14 00:00 |
08:45:35.20 |
+41:55:49.9 |
HIP 42940 |
16.09 |
| 2026-08-14 12:00 |
08:45:36.74 |
+41:55:47.3 |
HIP 42940 |
16.13 |
| 2026-08-15 00:00 |
08:45:38.28 |
+41:55:44.7 |
HIP 42940 |
16.18 |
| 2026-08-15 12:00 |
08:45:39.82 |
+41:55:42.3 |
HIP 42940 |
16.24 |
| 2026-08-16 00:00 |
08:45:41.35 |
+41:55:39.9 |
HIP 42940 |
16.30 |
| 2026-08-16 12:00 |
08:45:42.88 |
+41:55:37.5 |
HIP 42940 |
16.36 |
| 2026-08-17 00:00 |
08:45:44.41 |
+41:55:35.3 |
HIP 42940 |
16.44 |
| 2026-08-17 12:00 |
08:45:45.94 |
+41:55:33.1 |
HIP 42940 |
16.51 |
| 2026-08-18 00:00 |
08:45:47.46 |
+41:55:30.9 |
HIP 42940 |
16.60 |
| 2026-08-18 12:00 |
08:45:48.97 |
+41:55:28.9 |
HIP 42940 |
16.69 |
| 2026-08-19 00:00 |
08:45:50.49 |
+41:55:26.9 |
HIP 42940 |
16.78 |