メタデータ
| 項目 |
値 |
| Designation |
C/1935 A1 (Johnson) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1935-02-26T11:16:10.096320Z |
| Orbit solution date (soln_date, UTC) |
2023-12-04T20:32:30Z |
| Obs used |
34 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
26.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1935-02-28.0000000 |
| e |
0.99129724 |
| q (au) |
0.811142 |
| a (au) |
93.205234 |
| i (deg) |
65.423637 |
| Ω (om, deg) |
92.444706 |
| ω (w, deg) |
18.398934 |
| M (ma, deg) |
0.001676 |
等級
散乱 + 全体線形
$$
M_a = (10.632 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.632 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.750 |
| k |
0.800 |
| δ90 |
1.066 |
| 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) |
| 2026-09-20 00:00 |
18:31:10.73 |
-33:47:20.1 |
HIP 90670 |
20.61 |
| 2026-09-20 12:00 |
18:31:10.50 |
-33:47:17.2 |
HIP 90670 |
20.54 |
| 2026-09-21 00:00 |
18:31:10.29 |
-33:47:14.3 |
HIP 90670 |
20.47 |
| 2026-09-21 12:00 |
18:31:10.09 |
-33:47:11.4 |
HIP 90670 |
20.41 |
| 2026-09-22 00:00 |
18:31:09.90 |
-33:47:08.4 |
HIP 90670 |
20.35 |
| 2026-09-22 12:00 |
18:31:09.73 |
-33:47:05.4 |
HIP 90670 |
20.29 |
| 2026-09-23 00:00 |
18:31:09.57 |
-33:47:02.5 |
HIP 90670 |
20.23 |
| 2026-09-23 12:00 |
18:31:09.42 |
-33:46:59.5 |
HIP 90670 |
20.17 |
| 2026-09-24 00:00 |
18:31:09.28 |
-33:46:56.5 |
HIP 90670 |
20.12 |
| 2026-09-24 12:00 |
18:31:09.15 |
-33:46:53.5 |
HIP 90670 |
20.06 |
| 2026-09-25 00:00 |
18:31:09.04 |
-33:46:50.5 |
HIP 90670 |
20.01 |
| 2026-09-25 12:00 |
18:31:08.94 |
-33:46:47.5 |
HIP 90670 |
19.96 |
| 2026-09-26 00:00 |
18:31:08.85 |
-33:46:44.4 |
HIP 90670 |
19.91 |
| 2026-09-26 12:00 |
18:31:08.77 |
-33:46:41.4 |
HIP 90670 |
19.86 |
| 2026-09-27 00:00 |
18:31:08.71 |
-33:46:38.3 |
HIP 90670 |
19.82 |
| 2026-09-27 12:00 |
18:31:08.66 |
-33:46:35.3 |
HIP 90670 |
19.78 |
| 2026-09-28 00:00 |
18:31:08.62 |
-33:46:32.2 |
HIP 90670 |
19.74 |
| 2026-09-28 12:00 |
18:31:08.59 |
-33:46:29.1 |
HIP 90670 |
19.70 |
| 2026-09-29 00:00 |
18:31:08.58 |
-33:46:26.0 |
HIP 90670 |
19.66 |
| 2026-09-29 12:00 |
18:31:08.57 |
-33:46:22.9 |
HIP 90670 |
19.62 |
| 2026-09-30 00:00 |
18:31:08.58 |
-33:46:19.8 |
HIP 90670 |
19.59 |
| 2026-09-30 12:00 |
18:31:08.61 |
-33:46:16.7 |
HIP 90670 |
19.56 |
| 2026-10-01 00:00 |
18:31:08.64 |
-33:46:13.6 |
HIP 90670 |
19.53 |
| 2026-10-01 12:00 |
18:31:08.69 |
-33:46:10.5 |
HIP 90670 |
19.50 |
| 2026-10-02 00:00 |
18:31:08.75 |
-33:46:07.3 |
HIP 90670 |
19.47 |
| 2026-10-02 12:00 |
18:31:08.82 |
-33:46:04.2 |
HIP 90670 |
19.45 |
| 2026-10-03 00:00 |
18:31:08.91 |
-33:46:01.0 |
HIP 90670 |
19.42 |
| 2026-10-03 12:00 |
18:31:09.01 |
-33:45:57.9 |
HIP 90670 |
19.40 |
| 2026-10-04 00:00 |
18:31:09.12 |
-33:45:54.7 |
HIP 90670 |
19.39 |
| 2026-10-04 12:00 |
18:31:09.24 |
-33:45:51.5 |
HIP 90670 |
19.37 |
| 2026-10-05 00:00 |
18:31:09.37 |
-33:45:48.4 |
HIP 90670 |
19.35 |
| 2026-10-05 12:00 |
18:31:09.52 |
-33:45:45.2 |
HIP 90670 |
19.34 |
| 2026-10-06 00:00 |
18:31:09.68 |
-33:45:42.0 |
HIP 90670 |
19.33 |
| 2026-10-06 12:00 |
18:31:09.85 |
-33:45:38.8 |
HIP 90670 |
19.32 |
| 2026-10-07 00:00 |
18:31:10.04 |
-33:45:35.6 |
HIP 90670 |
19.32 |
| 2026-10-07 12:00 |
18:31:10.23 |
-33:45:32.4 |
HIP 90670 |
19.31 |
| 2026-10-08 00:00 |
18:31:10.44 |
-33:45:29.2 |
HIP 90670 |
19.31 |
| 2026-10-08 12:00 |
18:31:10.67 |
-33:45:26.0 |
HIP 90670 |
19.31 |
| 2026-10-09 00:00 |
18:31:10.90 |
-33:45:22.8 |
HIP 90670 |
19.31 |
| 2026-10-09 12:00 |
18:31:11.15 |
-33:45:19.6 |
HIP 90670 |
19.32 |
| 2026-10-10 00:00 |
18:31:11.41 |
-33:45:16.3 |
HIP 90670 |
19.32 |
| 2026-10-10 12:00 |
18:31:11.68 |
-33:45:13.1 |
HIP 90670 |
19.33 |
| 2026-10-11 00:00 |
18:31:11.96 |
-33:45:09.9 |
HIP 90670 |
19.34 |