メタデータ
| 項目 |
値 |
| Designation |
C/1993 A1 (Mueller) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-01-12T21:38:07.189440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:43Z |
| Obs used |
714 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
4.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1993-08-20.0000000 |
| e |
1.00184088 |
| q (au) |
1.937455 |
| a (au) |
-1052.462705 |
| i (deg) |
124.878071 |
| Ω (om, deg) |
144.720539 |
| ω (w, deg) |
130.666066 |
| M (ma, deg) |
-0.004212 |
等級
散乱 + 全体線形
$$
M_a = (5.190 + 3.446\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.190 |
| n |
3.446 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.989 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1992-11-26 |
1993-08-06 |
+1.7238 |
-0.931 |
| 1993-08-06 |
1994-01-12 |
-3.7755 |
+1.282 |
| 1994-01-13 |
1994-07-15 |
+9.6590 |
-2.801 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
11:23:54.18 |
-54:18:07.9 |
HIP 55782 |
16.46 |
| 2026-06-01 12:00 |
11:23:53.54 |
-54:17:39.1 |
HIP 55782 |
16.52 |
| 2026-06-02 00:00 |
11:23:52.92 |
-54:17:10.3 |
HIP 55782 |
16.58 |
| 2026-06-02 12:00 |
11:23:52.34 |
-54:16:41.5 |
HIP 55782 |
16.66 |
| 2026-06-03 00:00 |
11:23:51.78 |
-54:16:12.8 |
HIP 55782 |
16.74 |
| 2026-06-03 12:00 |
11:23:51.26 |
-54:15:44.1 |
HIP 55782 |
16.84 |
| 2026-06-04 00:00 |
11:23:50.76 |
-54:15:15.4 |
HIP 55782 |
16.94 |
| 2026-06-04 12:00 |
11:23:50.29 |
-54:14:46.7 |
HIP 55782 |
17.06 |
| 2026-06-05 00:00 |
11:23:49.84 |
-54:14:18.1 |
HIP 55782 |
17.18 |
| 2026-06-05 12:00 |
11:23:49.43 |
-54:13:49.5 |
HIP 55782 |
17.31 |
| 2026-06-06 00:00 |
11:23:49.04 |
-54:13:21.0 |
HIP 55782 |
17.44 |
| 2026-06-06 12:00 |
11:23:48.69 |
-54:12:52.4 |
HIP 55782 |
17.59 |
| 2026-06-07 00:00 |
11:23:48.36 |
-54:12:24.0 |
HIP 55782 |
17.74 |
| 2026-06-07 12:00 |
11:23:48.06 |
-54:11:55.5 |
HIP 55782 |
17.90 |
| 2026-06-08 00:00 |
11:23:47.78 |
-54:11:27.2 |
HIP 55782 |
18.07 |
| 2026-06-08 12:00 |
11:23:47.54 |
-54:10:58.8 |
HIP 55782 |
18.25 |
| 2026-06-09 00:00 |
11:23:47.32 |
-54:10:30.5 |
HIP 55782 |
18.43 |
| 2026-06-09 12:00 |
11:23:47.13 |
-54:10:02.3 |
HIP 55782 |
18.61 |
| 2026-06-10 00:00 |
11:23:46.97 |
-54:09:34.1 |
HIP 55782 |
18.80 |
| 2026-06-10 12:00 |
11:23:46.84 |
-54:09:06.0 |
HIP 55782 |
19.00 |
| 2026-06-11 00:00 |
11:23:46.74 |
-54:08:37.9 |
HIP 55782 |
19.21 |
| 2026-06-11 12:00 |
11:23:46.66 |
-54:08:09.9 |
HIP 55782 |
19.41 |
| 2026-06-12 00:00 |
11:23:46.62 |
-54:07:42.0 |
HIP 55782 |
19.63 |
| 2026-06-12 12:00 |
11:23:46.60 |
-54:07:14.1 |
HIP 55782 |
19.84 |
| 2026-06-13 00:00 |
11:23:46.61 |
-54:06:46.3 |
HIP 55782 |
20.07 |
| 2026-06-13 12:00 |
11:23:46.65 |
-54:06:18.5 |
HIP 55782 |
20.29 |
| 2026-06-14 00:00 |
11:23:46.71 |
-54:05:50.9 |
HIP 55782 |
20.52 |
| 2026-06-14 12:00 |
11:23:46.81 |
-54:05:23.2 |
HIP 55782 |
20.75 |
| 2026-06-15 00:00 |
11:23:46.93 |
-54:04:55.7 |
HIP 55782 |
20.99 |
| 2026-06-15 12:00 |
11:23:47.08 |
-54:04:28.3 |
HIP 55782 |
21.23 |
| 2026-06-16 00:00 |
11:23:47.26 |
-54:04:00.9 |
HIP 55782 |
21.47 |
| 2026-06-16 12:00 |
11:23:47.47 |
-54:03:33.6 |
HIP 55782 |
21.72 |
| 2026-06-17 00:00 |
11:23:47.70 |
-54:03:06.4 |
HIP 55782 |
21.97 |
| 2026-06-17 12:00 |
11:23:47.96 |
-54:02:39.2 |
HIP 55782 |
22.22 |
| 2026-06-18 00:00 |
11:23:48.25 |
-54:02:12.2 |
HIP 55782 |
22.47 |
| 2026-06-18 12:00 |
11:23:48.57 |
-54:01:45.2 |
HIP 55782 |
22.72 |
| 2026-06-19 00:00 |
11:23:48.92 |
-54:01:18.4 |
HIP 55782 |
22.98 |
| 2026-06-19 12:00 |
11:23:49.29 |
-54:00:51.6 |
HIP 55782 |
23.24 |
| 2026-06-20 00:00 |
11:23:49.69 |
-54:00:24.9 |
HIP 55782 |
23.50 |
| 2026-06-20 12:00 |
11:23:50.12 |
-53:59:58.3 |
HIP 55782 |
23.76 |
| 2026-06-21 00:00 |
11:23:50.58 |
-53:59:31.8 |
HIP 55782 |
24.03 |
| 2026-06-21 12:00 |
11:23:51.06 |
-53:59:05.4 |
HIP 55782 |
24.29 |
| 2026-06-22 00:00 |
11:23:51.57 |
-53:58:39.1 |
HIP 55782 |
24.56 |