C/1993 A1 (Mueller)
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) |
| 2026-02-03 00:00 |
11:34:45.43 |
-55:13:55.6 |
HIP 56629 |
17.08 |
| 2026-02-03 12:00 |
11:34:42.64 |
-55:14:06.8 |
HIP 56629 |
17.52 |
| 2026-02-04 00:00 |
11:34:39.84 |
-55:14:17.9 |
HIP 56629 |
17.95 |
| 2026-02-04 12:00 |
11:34:37.01 |
-55:14:28.7 |
HIP 56629 |
18.39 |
| 2026-02-05 00:00 |
11:34:34.16 |
-55:14:39.3 |
HIP 56629 |
18.83 |
| 2026-02-05 12:00 |
11:34:31.30 |
-55:14:49.7 |
HIP 56629 |
19.27 |
| 2026-02-06 00:00 |
11:34:28.42 |
-55:14:59.9 |
HIP 56629 |
19.71 |
| 2026-02-06 12:00 |
11:34:25.51 |
-55:15:09.8 |
HIP 56629 |
20.16 |
| 2026-02-07 00:00 |
11:34:22.59 |
-55:15:19.4 |
HIP 56629 |
20.60 |
| 2026-02-07 12:00 |
11:34:19.65 |
-55:15:28.9 |
HIP 56629 |
21.05 |
| 2026-02-08 00:00 |
11:34:16.69 |
-55:15:38.1 |
HIP 56629 |
21.50 |
| 2026-02-08 12:00 |
11:34:13.71 |
-55:15:47.0 |
HIP 56629 |
21.95 |
| 2026-02-09 00:00 |
11:34:10.72 |
-55:15:55.8 |
HIP 56629 |
22.40 |
| 2026-02-09 12:00 |
11:34:07.70 |
-55:16:04.2 |
HIP 56629 |
22.85 |
| 2026-02-10 00:00 |
11:34:04.67 |
-55:16:12.5 |
HIP 56629 |
23.30 |
| 2026-02-10 12:00 |
11:34:01.63 |
-55:16:20.5 |
HIP 56629 |
23.76 |
| 2026-02-11 00:00 |
11:33:58.56 |
-55:16:28.3 |
HIP 56629 |
24.21 |
| 2026-02-11 12:00 |
11:33:55.48 |
-55:16:35.8 |
HIP 56629 |
24.67 |
| 2026-02-12 00:00 |
11:33:52.39 |
-55:16:43.1 |
HIP 56629 |
25.12 |
| 2026-02-12 12:00 |
11:33:49.27 |
-55:16:50.1 |
HIP 56629 |
25.58 |
| 2026-02-13 00:00 |
11:33:46.14 |
-55:16:56.9 |
HIP 56629 |
26.04 |
| 2026-02-13 12:00 |
11:33:43.00 |
-55:17:03.4 |
HIP 56629 |
26.50 |
| 2026-02-14 00:00 |
11:33:39.84 |
-55:17:09.7 |
HIP 56629 |
26.96 |
| 2026-02-14 12:00 |
11:33:36.66 |
-55:17:15.7 |
HIP 56629 |
27.42 |
| 2026-02-15 00:00 |
11:33:33.47 |
-55:17:21.5 |
HIP 56629 |
27.89 |
| 2026-02-15 12:00 |
11:33:30.27 |
-55:17:27.1 |
HIP 56629 |
28.35 |
| 2026-02-16 00:00 |
11:33:27.05 |
-55:17:32.4 |
HIP 56629 |
28.81 |
| 2026-02-16 12:00 |
11:33:23.81 |
-55:17:37.4 |
HIP 56629 |
29.28 |
| 2026-02-17 00:00 |
11:33:20.56 |
-55:17:42.2 |
HIP 56097 |
29.04 |
| 2026-02-17 12:00 |
11:33:17.30 |
-55:17:46.8 |
HIP 56097 |
28.59 |
| 2026-02-18 00:00 |
11:33:14.03 |
-55:17:51.1 |
HIP 56097 |
28.12 |
| 2026-02-18 12:00 |
11:33:10.74 |
-55:17:55.1 |
HIP 56097 |
27.66 |
| 2026-02-19 00:00 |
11:33:07.44 |
-55:17:58.9 |
HIP 56097 |
27.20 |
| 2026-02-19 12:00 |
11:33:04.13 |
-55:18:02.4 |
HIP 56097 |
26.73 |
| 2026-02-20 00:00 |
11:33:00.81 |
-55:18:05.7 |
HIP 56097 |
26.27 |
| 2026-02-20 12:00 |
11:32:57.47 |
-55:18:08.7 |
HIP 56097 |
25.80 |
| 2026-02-21 00:00 |
11:32:54.12 |
-55:18:11.5 |
HIP 56097 |
25.33 |
| 2026-02-21 12:00 |
11:32:50.76 |
-55:18:14.0 |
HIP 56097 |
24.85 |
| 2026-02-22 00:00 |
11:32:47.39 |
-55:18:16.3 |
HIP 56097 |
24.38 |
| 2026-02-22 12:00 |
11:32:44.01 |
-55:18:18.3 |
HIP 56097 |
23.90 |
| 2026-02-23 00:00 |
11:32:40.62 |
-55:18:20.1 |
HIP 56097 |
23.43 |
| 2026-02-23 12:00 |
11:32:37.22 |
-55:18:21.6 |
HIP 56097 |
22.95 |
| 2026-02-24 00:00 |
11:32:33.81 |
-55:18:22.8 |
HIP 56097 |
22.47 |