メタデータ
| 項目 |
値 |
| Designation |
C/1998 K1 (Mueller) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-09-01T00:55:41.113920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:53Z |
| Obs used |
171 |
| NEO |
- |
| M1 |
8.000 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1998-06-05.0000000 |
| e |
0.94515162 |
| q (au) |
3.416610 |
| a (au) |
62.291906 |
| i (deg) |
35.636035 |
| Ω (om, deg) |
18.256263 |
| ω (w, deg) |
165.250246 |
| M (ma, deg) |
359.823506 |
等級
散乱 + 全体線形
$$
M_a = (4.128 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
4.128 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| k |
1.000 |
| 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 |
23:35:25.91 |
-27:38:12.9 |
HIP 116371 |
9.01 |
| 2026-09-20 12:00 |
23:35:23.21 |
-27:38:24.1 |
HIP 116371 |
8.40 |
| 2026-09-21 00:00 |
23:35:20.51 |
-27:38:35.1 |
HIP 116371 |
7.80 |
| 2026-09-21 12:00 |
23:35:17.81 |
-27:38:46.0 |
HIP 116371 |
7.20 |
| 2026-09-22 00:00 |
23:35:15.11 |
-27:38:56.7 |
HIP 116371 |
6.60 |
| 2026-09-22 12:00 |
23:35:12.41 |
-27:39:07.3 |
HIP 116371 |
6.02 |
| 2026-09-23 00:00 |
23:35:09.72 |
-27:39:17.7 |
HIP 116371 |
5.44 |
| 2026-09-23 12:00 |
23:35:07.03 |
-27:39:27.9 |
HIP 116371 |
4.88 |
| 2026-09-24 00:00 |
23:35:04.35 |
-27:39:38.0 |
HIP 116371 |
4.34 |
| 2026-09-24 12:00 |
23:35:01.67 |
-27:39:47.9 |
HIP 116371 |
3.82 |
| 2026-09-25 00:00 |
23:34:58.99 |
-27:39:57.6 |
HIP 116371 |
3.34 |
| 2026-09-25 12:00 |
23:34:56.32 |
-27:40:07.2 |
HIP 116371 |
2.91 |
| 2026-09-26 00:00 |
23:34:53.65 |
-27:40:16.6 |
HIP 116371 |
2.57 |
| 2026-09-26 12:00 |
23:34:50.98 |
-27:40:25.8 |
HIP 116371 |
2.33 |
| 2026-09-27 00:00 |
23:34:48.32 |
-27:40:34.8 |
HIP 116371 |
2.25 |
| 2026-09-27 12:00 |
23:34:45.66 |
-27:40:43.7 |
HIP 116371 |
2.32 |
| 2026-09-28 00:00 |
23:34:43.01 |
-27:40:52.4 |
HIP 116371 |
2.55 |
| 2026-09-28 12:00 |
23:34:40.37 |
-27:41:00.9 |
HIP 116346 |
2.20 |
| 2026-09-29 00:00 |
23:34:37.72 |
-27:41:09.3 |
HIP 116346 |
1.60 |
| 2026-09-29 12:00 |
23:34:35.09 |
-27:41:17.5 |
HIP 116346 |
1.00 |
| 2026-09-30 00:00 |
23:34:32.46 |
-27:41:25.5 |
HIP 116346 |
0.41 |
| 2026-09-30 12:00 |
23:34:29.84 |
-27:41:33.3 |
HIP 116346 |
0.19 |
| 2026-10-01 00:00 |
23:34:27.22 |
-27:41:41.0 |
HIP 116346 |
0.78 |
| 2026-10-01 12:00 |
23:34:24.61 |
-27:41:48.4 |
HIP 116346 |
1.37 |
| 2026-10-02 00:00 |
23:34:22.00 |
-27:41:55.7 |
HIP 116346 |
1.96 |
| 2026-10-02 12:00 |
23:34:19.41 |
-27:42:02.8 |
HIP 116346 |
2.55 |
| 2026-10-03 00:00 |
23:34:16.82 |
-27:42:09.8 |
HIP 116346 |
3.13 |
| 2026-10-03 12:00 |
23:34:14.23 |
-27:42:16.5 |
HIP 116346 |
3.72 |
| 2026-10-04 00:00 |
23:34:11.66 |
-27:42:23.1 |
HIP 116346 |
4.30 |
| 2026-10-04 12:00 |
23:34:09.09 |
-27:42:29.5 |
HIP 116346 |
4.87 |
| 2026-10-05 00:00 |
23:34:06.53 |
-27:42:35.7 |
HIP 116346 |
5.45 |
| 2026-10-05 12:00 |
23:34:03.98 |
-27:42:41.7 |
HIP 116346 |
6.02 |
| 2026-10-06 00:00 |
23:34:01.43 |
-27:42:47.5 |
HIP 116346 |
6.59 |
| 2026-10-06 12:00 |
23:33:58.90 |
-27:42:53.2 |
HIP 116346 |
7.16 |
| 2026-10-07 00:00 |
23:33:56.37 |
-27:42:58.7 |
HIP 116346 |
7.73 |
| 2026-10-07 12:00 |
23:33:53.85 |
-27:43:03.9 |
HIP 116346 |
8.29 |
| 2026-10-08 00:00 |
23:33:51.35 |
-27:43:09.0 |
HIP 116346 |
8.85 |
| 2026-10-08 12:00 |
23:33:48.85 |
-27:43:13.9 |
HIP 116346 |
9.41 |
| 2026-10-09 00:00 |
23:33:46.36 |
-27:43:18.6 |
HIP 116346 |
9.97 |
| 2026-10-09 12:00 |
23:33:43.88 |
-27:43:23.1 |
HIP 116346 |
10.52 |
| 2026-10-10 00:00 |
23:33:41.41 |
-27:43:27.5 |
HIP 116346 |
11.07 |
| 2026-10-10 12:00 |
23:33:38.95 |
-27:43:31.6 |
HIP 116346 |
11.62 |
| 2026-10-11 00:00 |
23:33:36.50 |
-27:43:35.6 |
HIP 116346 |
12.16 |