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) |
| 2026-06-01 00:00 |
18:35:16.33 |
-33:48:16.1 |
HIP 91153 |
10.95 |
| 2026-06-01 12:00 |
18:35:15.06 |
-33:48:18.9 |
HIP 91153 |
11.07 |
| 2026-06-02 00:00 |
18:35:13.78 |
-33:48:21.6 |
HIP 91153 |
11.20 |
| 2026-06-02 12:00 |
18:35:12.50 |
-33:48:24.3 |
HIP 91153 |
11.33 |
| 2026-06-03 00:00 |
18:35:11.21 |
-33:48:27.0 |
HIP 91153 |
11.47 |
| 2026-06-03 12:00 |
18:35:09.92 |
-33:48:29.6 |
HIP 91153 |
11.61 |
| 2026-06-04 00:00 |
18:35:08.62 |
-33:48:32.2 |
HIP 91153 |
11.76 |
| 2026-06-04 12:00 |
18:35:07.32 |
-33:48:34.9 |
HIP 91153 |
11.91 |
| 2026-06-05 00:00 |
18:35:06.01 |
-33:48:37.4 |
HIP 91153 |
12.07 |
| 2026-06-05 12:00 |
18:35:04.70 |
-33:48:40.0 |
HIP 91153 |
12.24 |
| 2026-06-06 00:00 |
18:35:03.38 |
-33:48:42.6 |
HIP 91153 |
12.41 |
| 2026-06-06 12:00 |
18:35:02.06 |
-33:48:45.1 |
HIP 91153 |
12.58 |
| 2026-06-07 00:00 |
18:35:00.73 |
-33:48:47.6 |
HIP 91153 |
12.76 |
| 2026-06-07 12:00 |
18:34:59.39 |
-33:48:50.0 |
HIP 91153 |
12.95 |
| 2026-06-08 00:00 |
18:34:58.05 |
-33:48:52.5 |
HIP 91153 |
13.14 |
| 2026-06-08 12:00 |
18:34:56.71 |
-33:48:54.9 |
HIP 91153 |
13.33 |
| 2026-06-09 00:00 |
18:34:55.36 |
-33:48:57.3 |
HIP 91153 |
13.52 |
| 2026-06-09 12:00 |
18:34:54.01 |
-33:48:59.7 |
HIP 91153 |
13.72 |
| 2026-06-10 00:00 |
18:34:52.66 |
-33:49:02.1 |
HIP 91153 |
13.93 |
| 2026-06-10 12:00 |
18:34:51.30 |
-33:49:04.4 |
HIP 91153 |
14.14 |
| 2026-06-11 00:00 |
18:34:49.93 |
-33:49:06.7 |
HIP 91153 |
14.35 |
| 2026-06-11 12:00 |
18:34:48.57 |
-33:49:09.0 |
HIP 91153 |
14.56 |
| 2026-06-12 00:00 |
18:34:47.19 |
-33:49:11.2 |
HIP 91153 |
14.78 |
| 2026-06-12 12:00 |
18:34:45.82 |
-33:49:13.4 |
HIP 91153 |
15.00 |
| 2026-06-13 00:00 |
18:34:44.44 |
-33:49:15.7 |
HIP 91153 |
15.23 |
| 2026-06-13 12:00 |
18:34:43.05 |
-33:49:17.8 |
HIP 91153 |
15.46 |
| 2026-06-14 00:00 |
18:34:41.67 |
-33:49:20.0 |
HIP 91153 |
15.69 |
| 2026-06-14 12:00 |
18:34:40.28 |
-33:49:22.1 |
HIP 91153 |
15.92 |
| 2026-06-15 00:00 |
18:34:38.88 |
-33:49:24.2 |
HIP 91153 |
16.16 |
| 2026-06-15 12:00 |
18:34:37.49 |
-33:49:26.3 |
HIP 91153 |
16.40 |
| 2026-06-16 00:00 |
18:34:36.09 |
-33:49:28.3 |
HIP 91153 |
16.64 |
| 2026-06-16 12:00 |
18:34:34.69 |
-33:49:30.4 |
HIP 91153 |
16.88 |
| 2026-06-17 00:00 |
18:34:33.28 |
-33:49:32.4 |
HIP 91153 |
17.13 |
| 2026-06-17 12:00 |
18:34:31.87 |
-33:49:34.3 |
HIP 90989 |
17.19 |
| 2026-06-18 00:00 |
18:34:30.46 |
-33:49:36.3 |
HIP 90989 |
17.01 |
| 2026-06-18 12:00 |
18:34:29.05 |
-33:49:38.2 |
HIP 90989 |
16.83 |
| 2026-06-19 00:00 |
18:34:27.64 |
-33:49:40.1 |
HIP 90989 |
16.66 |
| 2026-06-19 12:00 |
18:34:26.22 |
-33:49:41.9 |
HIP 90989 |
16.48 |
| 2026-06-20 00:00 |
18:34:24.80 |
-33:49:43.8 |
HIP 90989 |
16.31 |
| 2026-06-20 12:00 |
18:34:23.38 |
-33:49:45.6 |
HIP 90989 |
16.15 |
| 2026-06-21 00:00 |
18:34:21.96 |
-33:49:47.3 |
HIP 90989 |
15.98 |
| 2026-06-21 12:00 |
18:34:20.53 |
-33:49:49.1 |
HIP 90989 |
15.82 |
| 2026-06-22 00:00 |
18:34:19.10 |
-33:49:50.8 |
HIP 90989 |
15.66 |