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) |
| 2026-09-20 00:00 |
03:29:06.53 |
-38:47:02.4 |
HIP 16279 |
16.22 |
| 2026-09-20 12:00 |
03:29:04.81 |
-38:47:31.3 |
HIP 16279 |
16.81 |
| 2026-09-21 00:00 |
03:29:03.06 |
-38:48:00.0 |
HIP 16279 |
17.39 |
| 2026-09-21 12:00 |
03:29:01.30 |
-38:48:28.7 |
HIP 16279 |
17.98 |
| 2026-09-22 00:00 |
03:28:59.51 |
-38:48:57.2 |
HIP 16279 |
18.57 |
| 2026-09-22 12:00 |
03:28:57.71 |
-38:49:25.6 |
HIP 16279 |
19.16 |
| 2026-09-23 00:00 |
03:28:55.88 |
-38:49:53.9 |
HIP 16254 |
19.06 |
| 2026-09-23 12:00 |
03:28:54.03 |
-38:50:22.1 |
HIP 16254 |
18.74 |
| 2026-09-24 00:00 |
03:28:52.16 |
-38:50:50.1 |
HIP 16254 |
18.43 |
| 2026-09-24 12:00 |
03:28:50.27 |
-38:51:18.0 |
HIP 16254 |
18.14 |
| 2026-09-25 00:00 |
03:28:48.36 |
-38:51:45.9 |
HIP 16254 |
17.88 |
| 2026-09-25 12:00 |
03:28:46.43 |
-38:52:13.5 |
HIP 16254 |
17.63 |
| 2026-09-26 00:00 |
03:28:44.47 |
-38:52:41.1 |
HIP 16254 |
17.40 |
| 2026-09-26 12:00 |
03:28:42.50 |
-38:53:08.5 |
HIP 16254 |
17.19 |
| 2026-09-27 00:00 |
03:28:40.51 |
-38:53:35.8 |
HIP 16254 |
17.00 |
| 2026-09-27 12:00 |
03:28:38.49 |
-38:54:03.0 |
HIP 16254 |
16.84 |
| 2026-09-28 00:00 |
03:28:36.46 |
-38:54:30.0 |
HIP 16254 |
16.70 |
| 2026-09-28 12:00 |
03:28:34.40 |
-38:54:56.9 |
HIP 16254 |
16.59 |
| 2026-09-29 00:00 |
03:28:32.33 |
-38:55:23.7 |
HIP 16254 |
16.50 |
| 2026-09-29 12:00 |
03:28:30.24 |
-38:55:50.3 |
HIP 16254 |
16.44 |
| 2026-09-30 00:00 |
03:28:28.12 |
-38:56:16.8 |
HIP 16254 |
16.40 |
| 2026-09-30 12:00 |
03:28:25.99 |
-38:56:43.1 |
HIP 16254 |
16.39 |
| 2026-10-01 00:00 |
03:28:23.84 |
-38:57:09.3 |
HIP 16254 |
16.41 |
| 2026-10-01 12:00 |
03:28:21.67 |
-38:57:35.3 |
HIP 16254 |
16.45 |
| 2026-10-02 00:00 |
03:28:19.48 |
-38:58:01.2 |
HIP 16254 |
16.52 |
| 2026-10-02 12:00 |
03:28:17.27 |
-38:58:27.0 |
HIP 16254 |
16.62 |
| 2026-10-03 00:00 |
03:28:15.04 |
-38:58:52.5 |
HIP 16254 |
16.74 |
| 2026-10-03 12:00 |
03:28:12.79 |
-38:59:18.0 |
HIP 16254 |
16.89 |
| 2026-10-04 00:00 |
03:28:10.53 |
-38:59:43.2 |
HIP 16254 |
17.06 |
| 2026-10-04 12:00 |
03:28:08.25 |
-39:00:08.3 |
HIP 16254 |
17.26 |
| 2026-10-05 00:00 |
03:28:05.95 |
-39:00:33.3 |
HIP 16254 |
17.48 |
| 2026-10-05 12:00 |
03:28:03.63 |
-39:00:58.0 |
HIP 16254 |
17.72 |
| 2026-10-06 00:00 |
03:28:01.29 |
-39:01:22.6 |
HIP 16254 |
17.98 |
| 2026-10-06 12:00 |
03:27:58.93 |
-39:01:47.1 |
HIP 16254 |
18.27 |
| 2026-10-07 00:00 |
03:27:56.56 |
-39:02:11.3 |
HIP 16254 |
18.57 |
| 2026-10-07 12:00 |
03:27:54.17 |
-39:02:35.4 |
HIP 16254 |
18.89 |
| 2026-10-08 00:00 |
03:27:51.76 |
-39:02:59.3 |
HIP 16254 |
19.23 |
| 2026-10-08 12:00 |
03:27:49.34 |
-39:03:23.1 |
HIP 16254 |
19.59 |
| 2026-10-09 00:00 |
03:27:46.90 |
-39:03:46.6 |
HIP 16254 |
19.97 |
| 2026-10-09 12:00 |
03:27:44.44 |
-39:04:10.0 |
HIP 16254 |
20.36 |
| 2026-10-10 00:00 |
03:27:41.96 |
-39:04:33.2 |
HIP 16254 |
20.76 |
| 2026-10-10 12:00 |
03:27:39.47 |
-39:04:56.2 |
HIP 16254 |
21.18 |
| 2026-10-11 00:00 |
03:27:36.96 |
-39:05:19.0 |
HIP 16254 |
21.61 |