メタデータ
| 項目 |
値 |
| Designation |
C/1892 E1 (Swift) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1892-04-07T03:44:20.731200Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T20:36:13Z |
| Obs used |
53 |
| 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) |
1892-07-27.0000000 |
| e |
0.99880065 |
| q (au) |
1.026893 |
| a (au) |
856.207621 |
| i (deg) |
38.700724 |
| Ω (om, deg) |
242.428343 |
| ω (w, deg) |
24.504179 |
| M (ma, deg) |
0.004361 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
04:58:59.10 |
+12:52:36.9 |
HIP 23163 |
5.03 |
| 2026-09-20 12:00 |
04:58:58.93 |
+12:52:34.5 |
HIP 23163 |
5.07 |
| 2026-09-21 00:00 |
04:58:58.75 |
+12:52:32.1 |
HIP 23163 |
5.11 |
| 2026-09-21 12:00 |
04:58:58.57 |
+12:52:29.7 |
HIP 23163 |
5.15 |
| 2026-09-22 00:00 |
04:58:58.38 |
+12:52:27.3 |
HIP 23163 |
5.20 |
| 2026-09-22 12:00 |
04:58:58.19 |
+12:52:24.9 |
HIP 23163 |
5.24 |
| 2026-09-23 00:00 |
04:58:57.99 |
+12:52:22.4 |
HIP 23163 |
5.28 |
| 2026-09-23 12:00 |
04:58:57.78 |
+12:52:20.0 |
HIP 23163 |
5.33 |
| 2026-09-24 00:00 |
04:58:57.56 |
+12:52:17.5 |
HIP 23163 |
5.38 |
| 2026-09-24 12:00 |
04:58:57.34 |
+12:52:15.1 |
HIP 23163 |
5.42 |
| 2026-09-25 00:00 |
04:58:57.11 |
+12:52:12.6 |
HIP 23163 |
5.47 |
| 2026-09-25 12:00 |
04:58:56.87 |
+12:52:10.2 |
HIP 23163 |
5.52 |
| 2026-09-26 00:00 |
04:58:56.62 |
+12:52:07.7 |
HIP 23163 |
5.57 |
| 2026-09-26 12:00 |
04:58:56.37 |
+12:52:05.2 |
HIP 23163 |
5.62 |
| 2026-09-27 00:00 |
04:58:56.11 |
+12:52:02.7 |
HIP 23163 |
5.67 |
| 2026-09-27 12:00 |
04:58:55.85 |
+12:52:00.3 |
HIP 23163 |
5.72 |
| 2026-09-28 00:00 |
04:58:55.58 |
+12:51:57.8 |
HIP 23163 |
5.77 |
| 2026-09-28 12:00 |
04:58:55.30 |
+12:51:55.3 |
HIP 23163 |
5.82 |
| 2026-09-29 00:00 |
04:58:55.01 |
+12:51:52.8 |
HIP 23163 |
5.88 |
| 2026-09-29 12:00 |
04:58:54.72 |
+12:51:50.3 |
HIP 23163 |
5.93 |
| 2026-09-30 00:00 |
04:58:54.42 |
+12:51:47.8 |
HIP 23163 |
5.99 |
| 2026-09-30 12:00 |
04:58:54.12 |
+12:51:45.2 |
HIP 23163 |
6.05 |
| 2026-10-01 00:00 |
04:58:53.80 |
+12:51:42.7 |
HIP 23163 |
6.11 |
| 2026-10-01 12:00 |
04:58:53.48 |
+12:51:40.2 |
HIP 23163 |
6.17 |
| 2026-10-02 00:00 |
04:58:53.16 |
+12:51:37.7 |
HIP 23163 |
6.23 |
| 2026-10-02 12:00 |
04:58:52.82 |
+12:51:35.1 |
HIP 23163 |
6.29 |
| 2026-10-03 00:00 |
04:58:52.48 |
+12:51:32.6 |
HIP 23163 |
6.35 |
| 2026-10-03 12:00 |
04:58:52.14 |
+12:51:30.1 |
HIP 23163 |
6.42 |
| 2026-10-04 00:00 |
04:58:51.78 |
+12:51:27.5 |
HIP 23163 |
6.49 |
| 2026-10-04 12:00 |
04:58:51.42 |
+12:51:25.0 |
HIP 23163 |
6.55 |
| 2026-10-05 00:00 |
04:58:51.06 |
+12:51:22.4 |
HIP 23163 |
6.62 |
| 2026-10-05 12:00 |
04:58:50.68 |
+12:51:19.9 |
HIP 23163 |
6.69 |
| 2026-10-06 00:00 |
04:58:50.30 |
+12:51:17.4 |
HIP 23163 |
6.76 |
| 2026-10-06 12:00 |
04:58:49.92 |
+12:51:14.8 |
HIP 23163 |
6.84 |
| 2026-10-07 00:00 |
04:58:49.52 |
+12:51:12.2 |
HIP 23163 |
6.91 |
| 2026-10-07 12:00 |
04:58:49.12 |
+12:51:09.7 |
HIP 23163 |
6.99 |
| 2026-10-08 00:00 |
04:58:48.72 |
+12:51:07.1 |
HIP 23163 |
7.06 |
| 2026-10-08 12:00 |
04:58:48.30 |
+12:51:04.6 |
HIP 23163 |
7.14 |
| 2026-10-09 00:00 |
04:58:47.88 |
+12:51:02.0 |
HIP 23163 |
7.22 |
| 2026-10-09 12:00 |
04:58:47.46 |
+12:50:59.5 |
HIP 23163 |
7.30 |
| 2026-10-10 00:00 |
04:58:47.03 |
+12:50:56.9 |
HIP 23163 |
7.39 |
| 2026-10-10 12:00 |
04:58:46.59 |
+12:50:54.3 |
HIP 23163 |
7.47 |
| 2026-10-11 00:00 |
04:58:46.14 |
+12:50:51.8 |
HIP 23163 |
7.56 |