メタデータ
| 項目 |
値 |
| Designation |
266P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-04-19T20:13:28.701120Z |
| Orbit solution date (soln_date, UTC) |
2021-05-04T16:40:00Z |
| Obs used |
520 |
| NEO |
- |
| M1 |
11.000 |
| K1 |
16.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-06-27.0000000 |
| e |
0.33964561 |
| q (au) |
2.332338 |
| a (au) |
3.531948 |
| i (deg) |
3.427133 |
| Ω (om, deg) |
5.003630 |
| ω (w, deg) |
98.009686 |
| M (ma, deg) |
207.380781 |
等級
散乱 + 全体線形
$$
M_a = (14.179 + 5.199\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.179 |
| n |
5.199 |
| gf |
0.870 |
| gb |
-0.500 |
| k |
0.913 |
| δ90 |
1.531 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
05:12:59.11 |
+25:19:56.6 |
HIP 24385 |
29.18 |
| 2026-07-29 12:00 |
05:13:58.29 |
+25:21:25.7 |
HIP 24550 |
27.25 |
| 2026-07-30 00:00 |
05:14:57.47 |
+25:22:53.5 |
HIP 24550 |
13.95 |
| 2026-07-30 12:00 |
05:15:56.64 |
+25:24:20.0 |
HIP 24550 |
2.84 |
| 2026-07-31 00:00 |
05:16:55.80 |
+25:25:45.2 |
HIP 24550 |
13.52 |
| 2026-07-31 12:00 |
05:17:54.95 |
+25:27:09.1 |
HIP 24705 |
23.27 |
| 2026-08-01 00:00 |
05:18:54.09 |
+25:28:31.7 |
HIP 24905 |
26.32 |
| 2026-08-01 12:00 |
05:19:53.22 |
+25:29:53.0 |
HIP 24905 |
20.40 |
| 2026-08-02 00:00 |
05:20:52.34 |
+25:31:13.0 |
HIP 24905 |
22.34 |
| 2026-08-02 12:00 |
05:21:51.44 |
+25:32:31.7 |
HIP 24905 |
30.68 |
| 2026-08-03 00:00 |
05:22:50.53 |
+25:33:49.1 |
HIP 25089 |
38.05 |
| 2026-08-03 12:00 |
05:23:49.60 |
+25:35:05.3 |
HIP 25400 |
31.55 |
| 2026-08-04 00:00 |
05:24:48.65 |
+25:36:20.1 |
HIP 25400 |
18.87 |
| 2026-08-04 12:00 |
05:25:47.69 |
+25:37:33.6 |
HIP 25400 |
8.62 |
| 2026-08-05 00:00 |
05:26:46.71 |
+25:38:45.8 |
HIP 25400 |
12.23 |
| 2026-08-05 12:00 |
05:27:45.71 |
+25:39:56.8 |
HIP 25400 |
24.11 |
| 2026-08-06 00:00 |
05:28:44.69 |
+25:41:06.4 |
HIP 25556 |
30.26 |
| 2026-08-06 12:00 |
05:29:43.65 |
+25:42:14.8 |
HIP 25792 |
21.97 |
| 2026-08-07 00:00 |
05:30:42.58 |
+25:43:21.8 |
HIP 25792 |
18.88 |
| 2026-08-07 12:00 |
05:31:41.49 |
+25:44:27.6 |
HIP 25792 |
24.18 |
| 2026-08-08 00:00 |
05:32:40.37 |
+25:45:32.1 |
HIP 26177 |
30.36 |
| 2026-08-08 12:00 |
05:33:39.22 |
+25:46:35.3 |
HIP 26177 |
17.42 |
| 2026-08-09 00:00 |
05:34:38.05 |
+25:47:37.2 |
HIP 26177 |
6.18 |
| 2026-08-09 12:00 |
05:35:36.85 |
+25:48:37.9 |
HIP 26225 |
4.55 |
| 2026-08-10 00:00 |
05:36:35.61 |
+25:49:37.2 |
HIP 26332 |
6.89 |
| 2026-08-10 12:00 |
05:37:34.34 |
+25:50:35.3 |
HIP 26332 |
15.56 |
| 2026-08-11 00:00 |
05:38:33.04 |
+25:51:32.1 |
HIP 26640 |
16.17 |
| 2026-08-11 12:00 |
05:39:31.71 |
+25:52:27.7 |
HIP 26640 |
3.12 |
| 2026-08-12 00:00 |
05:40:30.33 |
+25:53:22.0 |
HIP 26640 |
10.39 |
| 2026-08-12 12:00 |
05:41:28.92 |
+25:54:15.0 |
HIP 26759 |
14.54 |
| 2026-08-13 00:00 |
05:42:27.47 |
+25:55:06.7 |
HIP 26832 |
21.88 |
| 2026-08-13 12:00 |
05:43:25.97 |
+25:55:57.2 |
HIP 26832 |
28.71 |
| 2026-08-14 00:00 |
05:44:24.44 |
+25:56:46.4 |
HIP 27173 |
20.10 |
| 2026-08-14 12:00 |
05:45:22.86 |
+25:57:34.4 |
HIP 27173 |
13.88 |
| 2026-08-15 00:00 |
05:46:21.23 |
+25:58:21.2 |
HIP 27173 |
18.09 |
| 2026-08-15 12:00 |
05:47:19.57 |
+25:59:06.6 |
HIP 27353 |
25.22 |
| 2026-08-16 00:00 |
05:48:17.85 |
+25:59:50.9 |
HIP 27478 |
23.56 |
| 2026-08-16 12:00 |
05:49:16.08 |
+26:00:33.9 |
HIP 27612 |
20.77 |
| 2026-08-17 00:00 |
05:50:14.27 |
+26:01:15.7 |
HIP 27612 |
7.79 |
| 2026-08-17 12:00 |
05:51:12.41 |
+26:01:56.2 |
HIP 27612 |
5.69 |
| 2026-08-18 00:00 |
05:52:10.49 |
+26:02:35.5 |
HIP 27742 |
15.09 |
| 2026-08-18 12:00 |
05:53:08.52 |
+26:03:13.6 |
HIP 27742 |
18.65 |
| 2026-08-19 00:00 |
05:54:06.50 |
+26:03:50.5 |
HIP 27850 |
20.88 |