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) |
| 2026-03-26 00:00 |
18:36:43.54 |
-33:40:29.5 |
HIP 91218 |
3.77 |
| 2026-03-26 12:00 |
18:36:43.65 |
-33:40:32.9 |
HIP 91218 |
3.76 |
| 2026-03-27 00:00 |
18:36:43.75 |
-33:40:36.4 |
HIP 91218 |
3.75 |
| 2026-03-27 12:00 |
18:36:43.84 |
-33:40:39.9 |
HIP 91218 |
3.73 |
| 2026-03-28 00:00 |
18:36:43.91 |
-33:40:43.4 |
HIP 91218 |
3.72 |
| 2026-03-28 12:00 |
18:36:43.97 |
-33:40:46.9 |
HIP 91218 |
3.71 |
| 2026-03-29 00:00 |
18:36:44.02 |
-33:40:50.4 |
HIP 91218 |
3.69 |
| 2026-03-29 12:00 |
18:36:44.06 |
-33:40:53.9 |
HIP 91218 |
3.67 |
| 2026-03-30 00:00 |
18:36:44.08 |
-33:40:57.4 |
HIP 91218 |
3.65 |
| 2026-03-30 12:00 |
18:36:44.10 |
-33:41:01.0 |
HIP 91218 |
3.63 |
| 2026-03-31 00:00 |
18:36:44.10 |
-33:41:04.5 |
HIP 91218 |
3.61 |
| 2026-03-31 12:00 |
18:36:44.08 |
-33:41:08.1 |
HIP 91218 |
3.59 |
| 2026-04-01 00:00 |
18:36:44.06 |
-33:41:11.6 |
HIP 91218 |
3.56 |
| 2026-04-01 12:00 |
18:36:44.02 |
-33:41:15.2 |
HIP 91218 |
3.53 |
| 2026-04-02 00:00 |
18:36:43.97 |
-33:41:18.8 |
HIP 91218 |
3.50 |
| 2026-04-02 12:00 |
18:36:43.91 |
-33:41:22.4 |
HIP 91218 |
3.47 |
| 2026-04-03 00:00 |
18:36:43.83 |
-33:41:26.0 |
HIP 91218 |
3.44 |
| 2026-04-03 12:00 |
18:36:43.74 |
-33:41:29.6 |
HIP 91218 |
3.40 |
| 2026-04-04 00:00 |
18:36:43.64 |
-33:41:33.2 |
HIP 91218 |
3.37 |
| 2026-04-04 12:00 |
18:36:43.53 |
-33:41:36.8 |
HIP 91218 |
3.33 |
| 2026-04-05 00:00 |
18:36:43.40 |
-33:41:40.5 |
HIP 91218 |
3.29 |
| 2026-04-05 12:00 |
18:36:43.27 |
-33:41:44.1 |
HIP 91218 |
3.25 |
| 2026-04-06 00:00 |
18:36:43.12 |
-33:41:47.8 |
HIP 91218 |
3.21 |
| 2026-04-06 12:00 |
18:36:42.95 |
-33:41:51.4 |
HIP 91218 |
3.16 |
| 2026-04-07 00:00 |
18:36:42.78 |
-33:41:55.1 |
HIP 91218 |
3.12 |
| 2026-04-07 12:00 |
18:36:42.59 |
-33:41:58.7 |
HIP 91218 |
3.07 |
| 2026-04-08 00:00 |
18:36:42.39 |
-33:42:02.4 |
HIP 91218 |
3.02 |
| 2026-04-08 12:00 |
18:36:42.18 |
-33:42:06.1 |
HIP 91218 |
2.97 |
| 2026-04-09 00:00 |
18:36:41.95 |
-33:42:09.8 |
HIP 91218 |
2.91 |
| 2026-04-09 12:00 |
18:36:41.72 |
-33:42:13.4 |
HIP 91218 |
2.86 |
| 2026-04-10 00:00 |
18:36:41.47 |
-33:42:17.1 |
HIP 91218 |
2.80 |
| 2026-04-10 12:00 |
18:36:41.21 |
-33:42:20.8 |
HIP 91218 |
2.75 |
| 2026-04-11 00:00 |
18:36:40.93 |
-33:42:24.5 |
HIP 91218 |
2.69 |
| 2026-04-11 12:00 |
18:36:40.65 |
-33:42:28.2 |
HIP 91218 |
2.63 |
| 2026-04-12 00:00 |
18:36:40.35 |
-33:42:32.0 |
HIP 91218 |
2.57 |
| 2026-04-12 12:00 |
18:36:40.04 |
-33:42:35.7 |
HIP 91218 |
2.51 |
| 2026-04-13 00:00 |
18:36:39.72 |
-33:42:39.4 |
HIP 91218 |
2.45 |
| 2026-04-13 12:00 |
18:36:39.38 |
-33:42:43.1 |
HIP 91218 |
2.38 |
| 2026-04-14 00:00 |
18:36:39.03 |
-33:42:46.8 |
HIP 91218 |
2.32 |
| 2026-04-14 12:00 |
18:36:38.67 |
-33:42:50.5 |
HIP 91218 |
2.26 |
| 2026-04-15 00:00 |
18:36:38.30 |
-33:42:54.3 |
HIP 91218 |
2.19 |
| 2026-04-15 12:00 |
18:36:37.92 |
-33:42:58.0 |
HIP 91218 |
2.13 |
| 2026-04-16 00:00 |
18:36:37.52 |
-33:43:01.7 |
HIP 91218 |
2.07 |