メタデータ
| 項目 |
値 |
| Designation |
C/2000 O1 (Koehn) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-01-27T17:38:15.144000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:05Z |
| Obs used |
64 |
| NEO |
- |
| M1 |
5.100 |
| K1 |
11.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-05-14.0000000 |
| e |
1.00000217 |
| q (au) |
5.921780 |
| a (au) |
-2729545.221721 |
| i (deg) |
148.104189 |
| Ω (om, deg) |
88.882672 |
| ω (w, deg) |
55.164253 |
| M (ma, deg) |
0.000000 |
等級
散乱 + 全体線形
$$
M_a = (2.023 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
2.023 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
17:07:20.69 |
-29:37:33.9 |
HIP 83871 |
26.40 |
| 2026-06-01 12:00 |
17:07:17.44 |
-29:37:32.4 |
HIP 83871 |
26.84 |
| 2026-06-02 00:00 |
17:07:14.18 |
-29:37:30.7 |
HIP 83871 |
27.29 |
| 2026-06-02 12:00 |
17:07:10.92 |
-29:37:29.1 |
HIP 83871 |
27.75 |
| 2026-06-03 00:00 |
17:07:07.66 |
-29:37:27.4 |
HIP 83592 |
27.44 |
| 2026-06-03 12:00 |
17:07:04.39 |
-29:37:25.6 |
HIP 83592 |
26.76 |
| 2026-06-04 00:00 |
17:07:01.13 |
-29:37:23.8 |
HIP 83592 |
26.07 |
| 2026-06-04 12:00 |
17:06:57.86 |
-29:37:21.9 |
HIP 83592 |
25.39 |
| 2026-06-05 00:00 |
17:06:54.59 |
-29:37:20.0 |
HIP 83592 |
24.70 |
| 2026-06-05 12:00 |
17:06:51.32 |
-29:37:18.1 |
HIP 83592 |
24.02 |
| 2026-06-06 00:00 |
17:06:48.04 |
-29:37:16.1 |
HIP 83592 |
23.34 |
| 2026-06-06 12:00 |
17:06:44.77 |
-29:37:14.1 |
HIP 83592 |
22.66 |
| 2026-06-07 00:00 |
17:06:41.49 |
-29:37:12.0 |
HIP 83592 |
21.99 |
| 2026-06-07 12:00 |
17:06:38.22 |
-29:37:09.8 |
HIP 83592 |
21.31 |
| 2026-06-08 00:00 |
17:06:34.94 |
-29:37:07.7 |
HIP 83592 |
20.64 |
| 2026-06-08 12:00 |
17:06:31.66 |
-29:37:05.4 |
HIP 83592 |
19.98 |
| 2026-06-09 00:00 |
17:06:28.38 |
-29:37:03.2 |
HIP 83592 |
19.31 |
| 2026-06-09 12:00 |
17:06:25.11 |
-29:37:00.9 |
HIP 83592 |
18.65 |
| 2026-06-10 00:00 |
17:06:21.83 |
-29:36:58.5 |
HIP 83592 |
18.00 |
| 2026-06-10 12:00 |
17:06:18.55 |
-29:36:56.1 |
HIP 83592 |
17.34 |
| 2026-06-11 00:00 |
17:06:15.28 |
-29:36:53.7 |
HIP 83592 |
16.70 |
| 2026-06-11 12:00 |
17:06:12.00 |
-29:36:51.2 |
HIP 83592 |
16.06 |
| 2026-06-12 00:00 |
17:06:08.73 |
-29:36:48.6 |
HIP 83592 |
15.43 |
| 2026-06-12 12:00 |
17:06:05.46 |
-29:36:46.1 |
HIP 83592 |
14.80 |
| 2026-06-13 00:00 |
17:06:02.19 |
-29:36:43.4 |
HIP 83592 |
14.19 |
| 2026-06-13 12:00 |
17:05:58.93 |
-29:36:40.8 |
HIP 83592 |
13.58 |
| 2026-06-14 00:00 |
17:05:55.66 |
-29:36:38.1 |
HIP 83592 |
12.99 |
| 2026-06-14 12:00 |
17:05:52.40 |
-29:36:35.3 |
HIP 83592 |
12.40 |
| 2026-06-15 00:00 |
17:05:49.14 |
-29:36:32.5 |
HIP 83592 |
11.84 |
| 2026-06-15 12:00 |
17:05:45.88 |
-29:36:29.7 |
HIP 83592 |
11.29 |
| 2026-06-16 00:00 |
17:05:42.63 |
-29:36:26.8 |
HIP 83592 |
10.76 |
| 2026-06-16 12:00 |
17:05:39.38 |
-29:36:23.9 |
HIP 83592 |
10.25 |
| 2026-06-17 00:00 |
17:05:36.14 |
-29:36:21.0 |
HIP 83592 |
9.77 |
| 2026-06-17 12:00 |
17:05:32.90 |
-29:36:18.0 |
HIP 83592 |
9.32 |
| 2026-06-18 00:00 |
17:05:29.66 |
-29:36:15.0 |
HIP 83592 |
8.91 |
| 2026-06-18 12:00 |
17:05:26.43 |
-29:36:11.9 |
HIP 83592 |
8.53 |
| 2026-06-19 00:00 |
17:05:23.20 |
-29:36:08.8 |
HIP 83592 |
8.19 |
| 2026-06-19 12:00 |
17:05:19.98 |
-29:36:05.7 |
HIP 83592 |
7.91 |
| 2026-06-20 00:00 |
17:05:16.76 |
-29:36:02.5 |
HIP 83592 |
7.68 |
| 2026-06-20 12:00 |
17:05:13.55 |
-29:35:59.3 |
HIP 83592 |
7.51 |
| 2026-06-21 00:00 |
17:05:10.35 |
-29:35:56.0 |
HIP 83592 |
7.41 |
| 2026-06-21 12:00 |
17:05:07.15 |
-29:35:52.7 |
HIP 83592 |
7.37 |
| 2026-06-22 00:00 |
17:05:03.96 |
-29:35:49.4 |
HIP 83592 |
7.39 |