メタデータ
| 項目 |
値 |
| Designation |
C/1997 J1 (Mueller) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1997-05-03T19:16:39.167040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:50Z |
| Obs used |
497 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
9.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1997-08-08.0000000 |
| e |
0.99099113 |
| q (au) |
2.302131 |
| a (au) |
255.540410 |
| i (deg) |
122.968328 |
| Ω (om, deg) |
277.076050 |
| ω (w, deg) |
98.954561 |
| M (ma, deg) |
0.023210 |
等級
散乱 + 全体線形
$$
M_a = (7.672 + 4.834\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.672 |
| n |
4.834 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
10.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
03:29:53.49 |
-37:53:39.7 |
HIP 16232 |
10.89 |
| 2026-07-29 12:00 |
03:29:54.31 |
-37:54:07.2 |
HIP 16232 |
10.72 |
| 2026-07-30 00:00 |
03:29:55.11 |
-37:54:34.9 |
HIP 16232 |
10.58 |
| 2026-07-30 12:00 |
03:29:55.89 |
-37:55:02.7 |
HIP 16232 |
10.44 |
| 2026-07-31 00:00 |
03:29:56.64 |
-37:55:30.5 |
HIP 16232 |
10.33 |
| 2026-07-31 12:00 |
03:29:57.37 |
-37:55:58.5 |
HIP 16232 |
10.23 |
| 2026-08-01 00:00 |
03:29:58.08 |
-37:56:26.6 |
HIP 16232 |
10.15 |
| 2026-08-01 12:00 |
03:29:58.76 |
-37:56:54.9 |
HIP 16232 |
10.08 |
| 2026-08-02 00:00 |
03:29:59.43 |
-37:57:23.2 |
HIP 16232 |
10.04 |
| 2026-08-02 12:00 |
03:30:00.06 |
-37:57:51.6 |
HIP 16232 |
10.01 |
| 2026-08-03 00:00 |
03:30:00.68 |
-37:58:20.2 |
HIP 16232 |
10.00 |
| 2026-08-03 12:00 |
03:30:01.27 |
-37:58:48.8 |
HIP 16232 |
10.02 |
| 2026-08-04 00:00 |
03:30:01.84 |
-37:59:17.6 |
HIP 16232 |
10.05 |
| 2026-08-04 12:00 |
03:30:02.39 |
-37:59:46.4 |
HIP 16232 |
10.10 |
| 2026-08-05 00:00 |
03:30:02.91 |
-38:00:15.4 |
HIP 16232 |
10.17 |
| 2026-08-05 12:00 |
03:30:03.40 |
-38:00:44.4 |
HIP 16232 |
10.26 |
| 2026-08-06 00:00 |
03:30:03.88 |
-38:01:13.6 |
HIP 16232 |
10.36 |
| 2026-08-06 12:00 |
03:30:04.33 |
-38:01:42.8 |
HIP 16232 |
10.49 |
| 2026-08-07 00:00 |
03:30:04.76 |
-38:02:12.2 |
HIP 16232 |
10.63 |
| 2026-08-07 12:00 |
03:30:05.16 |
-38:02:41.6 |
HIP 16232 |
10.78 |
| 2026-08-08 00:00 |
03:30:05.54 |
-38:03:11.1 |
HIP 16232 |
10.96 |
| 2026-08-08 12:00 |
03:30:05.89 |
-38:03:40.7 |
HIP 16232 |
11.15 |
| 2026-08-09 00:00 |
03:30:06.22 |
-38:04:10.4 |
HIP 16232 |
11.35 |
| 2026-08-09 12:00 |
03:30:06.53 |
-38:04:40.2 |
HIP 16232 |
11.57 |
| 2026-08-10 00:00 |
03:30:06.81 |
-38:05:10.0 |
HIP 16232 |
11.80 |
| 2026-08-10 12:00 |
03:30:07.07 |
-38:05:40.0 |
HIP 16232 |
12.04 |
| 2026-08-11 00:00 |
03:30:07.30 |
-38:06:10.0 |
HIP 16232 |
12.30 |
| 2026-08-11 12:00 |
03:30:07.51 |
-38:06:40.0 |
HIP 16232 |
12.57 |
| 2026-08-12 00:00 |
03:30:07.70 |
-38:07:10.2 |
HIP 16232 |
12.84 |
| 2026-08-12 12:00 |
03:30:07.86 |
-38:07:40.4 |
HIP 16232 |
13.13 |
| 2026-08-13 00:00 |
03:30:07.99 |
-38:08:10.7 |
HIP 16232 |
13.43 |
| 2026-08-13 12:00 |
03:30:08.10 |
-38:08:41.0 |
HIP 16232 |
13.73 |
| 2026-08-14 00:00 |
03:30:08.19 |
-38:09:11.5 |
HIP 16232 |
14.05 |
| 2026-08-14 12:00 |
03:30:08.25 |
-38:09:41.9 |
HIP 16232 |
14.37 |
| 2026-08-15 00:00 |
03:30:08.29 |
-38:10:12.5 |
HIP 16232 |
14.70 |
| 2026-08-15 12:00 |
03:30:08.30 |
-38:10:43.1 |
HIP 16232 |
15.03 |
| 2026-08-16 00:00 |
03:30:08.29 |
-38:11:13.7 |
HIP 16232 |
15.38 |
| 2026-08-16 12:00 |
03:30:08.25 |
-38:11:44.4 |
HIP 16257 |
15.05 |
| 2026-08-17 00:00 |
03:30:08.19 |
-38:12:15.1 |
HIP 16257 |
14.59 |
| 2026-08-17 12:00 |
03:30:08.10 |
-38:12:45.9 |
HIP 16257 |
14.14 |
| 2026-08-18 00:00 |
03:30:07.99 |
-38:13:16.8 |
HIP 16257 |
13.68 |
| 2026-08-18 12:00 |
03:30:07.85 |
-38:13:47.6 |
HIP 16257 |
13.23 |
| 2026-08-19 00:00 |
03:30:07.69 |
-38:14:18.6 |
HIP 16257 |
12.78 |