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) |
| 2026-06-01 00:00 |
08:42:13.09 |
+42:11:49.0 |
HIP 42596 |
20.16 |
| 2026-06-01 12:00 |
08:42:13.92 |
+42:11:40.3 |
HIP 42596 |
20.37 |
| 2026-06-02 00:00 |
08:42:14.77 |
+42:11:31.7 |
HIP 42596 |
20.59 |
| 2026-06-02 12:00 |
08:42:15.63 |
+42:11:23.0 |
HIP 42596 |
20.80 |
| 2026-06-03 00:00 |
08:42:16.49 |
+42:11:14.4 |
HIP 42596 |
21.02 |
| 2026-06-03 12:00 |
08:42:17.37 |
+42:11:05.7 |
HIP 42596 |
21.24 |
| 2026-06-04 00:00 |
08:42:18.26 |
+42:10:57.1 |
HIP 42596 |
21.45 |
| 2026-06-04 12:00 |
08:42:19.16 |
+42:10:48.4 |
HIP 42596 |
21.67 |
| 2026-06-05 00:00 |
08:42:20.08 |
+42:10:39.8 |
HIP 42876 |
21.88 |
| 2026-06-05 12:00 |
08:42:21.00 |
+42:10:31.2 |
HIP 42876 |
21.69 |
| 2026-06-06 00:00 |
08:42:21.93 |
+42:10:22.6 |
HIP 42876 |
21.49 |
| 2026-06-06 12:00 |
08:42:22.88 |
+42:10:14.0 |
HIP 42876 |
21.29 |
| 2026-06-07 00:00 |
08:42:23.83 |
+42:10:05.4 |
HIP 42876 |
21.09 |
| 2026-06-07 12:00 |
08:42:24.80 |
+42:09:56.8 |
HIP 42876 |
20.88 |
| 2026-06-08 00:00 |
08:42:25.78 |
+42:09:48.2 |
HIP 42876 |
20.68 |
| 2026-06-08 12:00 |
08:42:26.76 |
+42:09:39.6 |
HIP 42876 |
20.47 |
| 2026-06-09 00:00 |
08:42:27.76 |
+42:09:31.1 |
HIP 42876 |
20.27 |
| 2026-06-09 12:00 |
08:42:28.77 |
+42:09:22.6 |
HIP 42876 |
20.06 |
| 2026-06-10 00:00 |
08:42:29.79 |
+42:09:14.0 |
HIP 42876 |
19.85 |
| 2026-06-10 12:00 |
08:42:30.82 |
+42:09:05.5 |
HIP 42876 |
19.64 |
| 2026-06-11 00:00 |
08:42:31.86 |
+42:08:57.0 |
HIP 42876 |
19.43 |
| 2026-06-11 12:00 |
08:42:32.90 |
+42:08:48.5 |
HIP 42876 |
19.22 |
| 2026-06-12 00:00 |
08:42:33.96 |
+42:08:40.1 |
HIP 42876 |
19.00 |
| 2026-06-12 12:00 |
08:42:35.03 |
+42:08:31.6 |
HIP 42876 |
18.79 |
| 2026-06-13 00:00 |
08:42:36.11 |
+42:08:23.2 |
HIP 42876 |
18.57 |
| 2026-06-13 12:00 |
08:42:37.20 |
+42:08:14.8 |
HIP 42876 |
18.35 |
| 2026-06-14 00:00 |
08:42:38.30 |
+42:08:06.4 |
HIP 42876 |
18.14 |
| 2026-06-14 12:00 |
08:42:39.40 |
+42:07:58.0 |
HIP 42876 |
17.92 |
| 2026-06-15 00:00 |
08:42:40.52 |
+42:07:49.6 |
HIP 42876 |
17.70 |
| 2026-06-15 12:00 |
08:42:41.65 |
+42:07:41.3 |
HIP 42876 |
17.48 |
| 2026-06-16 00:00 |
08:42:42.78 |
+42:07:32.9 |
HIP 42876 |
17.25 |
| 2026-06-16 12:00 |
08:42:43.93 |
+42:07:24.6 |
HIP 42876 |
17.03 |
| 2026-06-17 00:00 |
08:42:45.08 |
+42:07:16.3 |
HIP 42876 |
16.81 |
| 2026-06-17 12:00 |
08:42:46.24 |
+42:07:08.1 |
HIP 42876 |
16.58 |
| 2026-06-18 00:00 |
08:42:47.42 |
+42:06:59.8 |
HIP 42876 |
16.36 |
| 2026-06-18 12:00 |
08:42:48.60 |
+42:06:51.6 |
HIP 42876 |
16.13 |
| 2026-06-19 00:00 |
08:42:49.79 |
+42:06:43.4 |
HIP 42876 |
15.90 |
| 2026-06-19 12:00 |
08:42:50.98 |
+42:06:35.3 |
HIP 42876 |
15.68 |
| 2026-06-20 00:00 |
08:42:52.19 |
+42:06:27.1 |
HIP 42876 |
15.45 |
| 2026-06-20 12:00 |
08:42:53.41 |
+42:06:19.0 |
HIP 42876 |
15.22 |
| 2026-06-21 00:00 |
08:42:54.63 |
+42:06:10.9 |
HIP 42876 |
14.99 |
| 2026-06-21 12:00 |
08:42:55.86 |
+42:06:02.9 |
HIP 42876 |
14.76 |
| 2026-06-22 00:00 |
08:42:57.10 |
+42:05:54.8 |
HIP 42876 |
14.54 |