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) |
| 2026-09-20 00:00 |
06:53:07.98 |
+26:05:27.1 |
HIP 33027 |
19.83 |
| 2026-09-20 12:00 |
06:53:59.60 |
+26:04:59.0 |
HIP 33027 |
24.11 |
| 2026-09-21 00:00 |
06:54:51.07 |
+26:04:30.2 |
HIP 33356 |
20.27 |
| 2026-09-21 12:00 |
06:55:42.39 |
+26:04:00.7 |
HIP 33356 |
9.89 |
| 2026-09-22 00:00 |
06:56:33.56 |
+26:03:30.5 |
HIP 33356 |
7.13 |
| 2026-09-22 12:00 |
06:57:24.57 |
+26:02:59.7 |
HIP 33356 |
16.35 |
| 2026-09-23 00:00 |
06:58:15.43 |
+26:02:28.2 |
HIP 33595 |
7.59 |
| 2026-09-23 12:00 |
06:59:06.14 |
+26:01:56.1 |
HIP 33595 |
5.10 |
| 2026-09-24 00:00 |
06:59:56.68 |
+26:01:23.3 |
HIP 33650 |
9.19 |
| 2026-09-24 12:00 |
07:00:47.07 |
+26:00:50.0 |
HIP 33793 |
13.57 |
| 2026-09-25 00:00 |
07:01:37.29 |
+26:00:16.0 |
HIP 33793 |
15.90 |
| 2026-09-25 12:00 |
07:02:27.36 |
+25:59:41.5 |
HIP 33831 |
22.95 |
| 2026-09-26 00:00 |
07:03:17.25 |
+25:59:06.4 |
HIP 33831 |
31.50 |
| 2026-09-26 12:00 |
07:04:06.98 |
+25:58:30.7 |
HIP 34061 |
33.45 |
| 2026-09-27 00:00 |
07:04:56.55 |
+25:57:54.5 |
HIP 34061 |
35.58 |
| 2026-09-27 12:00 |
07:05:45.94 |
+25:57:17.7 |
HIP 34061 |
40.75 |
| 2026-09-28 00:00 |
07:06:35.16 |
+25:56:40.5 |
HIP 34567 |
42.58 |
| 2026-09-28 12:00 |
07:07:24.21 |
+25:56:02.7 |
HIP 34567 |
31.99 |
| 2026-09-29 00:00 |
07:08:13.08 |
+25:55:24.4 |
HIP 34567 |
21.90 |
| 2026-09-29 12:00 |
07:09:01.78 |
+25:54:45.6 |
HIP 34567 |
13.37 |
| 2026-09-30 00:00 |
07:09:50.30 |
+25:54:06.4 |
HIP 34582 |
10.11 |
| 2026-09-30 12:00 |
07:10:38.63 |
+25:53:26.7 |
HIP 34582 |
15.41 |
| 2026-10-01 00:00 |
07:11:26.78 |
+25:52:46.6 |
HIP 34861 |
20.18 |
| 2026-10-01 12:00 |
07:12:14.75 |
+25:52:06.1 |
HIP 34861 |
10.60 |
| 2026-10-02 00:00 |
07:13:02.53 |
+25:51:25.1 |
HIP 34861 |
7.14 |
| 2026-10-02 12:00 |
07:13:50.12 |
+25:50:43.8 |
HIP 34861 |
14.85 |
| 2026-10-03 00:00 |
07:14:37.51 |
+25:50:02.0 |
HIP 35070 |
7.40 |
| 2026-10-03 12:00 |
07:15:24.71 |
+25:49:19.9 |
HIP 35070 |
5.14 |
| 2026-10-04 00:00 |
07:16:11.72 |
+25:48:37.5 |
HIP 35070 |
14.95 |
| 2026-10-04 12:00 |
07:16:58.52 |
+25:47:54.7 |
HIP 35070 |
25.36 |
| 2026-10-05 00:00 |
07:17:45.13 |
+25:47:11.6 |
HIP 35435 |
18.24 |
| 2026-10-05 12:00 |
07:18:31.53 |
+25:46:28.3 |
HIP 35435 |
11.31 |
| 2026-10-06 00:00 |
07:19:17.72 |
+25:45:44.6 |
HIP 35435 |
11.91 |
| 2026-10-06 12:00 |
07:20:03.70 |
+25:45:00.6 |
HIP 35624 |
14.29 |
| 2026-10-07 00:00 |
07:20:49.48 |
+25:44:16.5 |
HIP 35624 |
5.18 |
| 2026-10-07 12:00 |
07:21:35.04 |
+25:43:32.0 |
HIP 35624 |
7.92 |
| 2026-10-08 00:00 |
07:22:20.38 |
+25:42:47.4 |
HIP 35624 |
17.57 |
| 2026-10-08 12:00 |
07:23:05.51 |
+25:42:02.6 |
HIP 35624 |
27.60 |
| 2026-10-09 00:00 |
07:23:50.41 |
+25:41:17.5 |
HIP 36110 |
36.92 |
| 2026-10-09 12:00 |
07:24:35.10 |
+25:40:32.3 |
HIP 36110 |
28.63 |
| 2026-10-10 00:00 |
07:25:19.55 |
+25:39:47.0 |
HIP 36110 |
21.93 |
| 2026-10-10 12:00 |
07:26:03.79 |
+25:39:01.5 |
HIP 36110 |
18.54 |
| 2026-10-11 00:00 |
07:26:47.79 |
+25:38:15.9 |
HIP 36110 |
20.13 |