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
$$
M_a = (14.294 + 5.175\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.294 |
| n |
5.175 |
| gf |
0.862 |
| gb |
-0.500 |
| k |
0.898 |
| δ90 |
1.451 |
| 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) |
| 2026-05-12 00:00 |
02:44:52.78 |
+17:30:18.2 |
HIP 12784 |
17.49 |
| 2026-05-12 12:00 |
02:45:45.62 |
+17:34:31.0 |
HIP 12784 |
23.52 |
| 2026-05-13 00:00 |
02:46:38.53 |
+17:38:43.2 |
HIP 13014 |
23.84 |
| 2026-05-13 12:00 |
02:47:31.51 |
+17:42:54.7 |
HIP 13092 |
16.87 |
| 2026-05-14 00:00 |
02:48:24.56 |
+17:47:05.6 |
HIP 13092 |
16.57 |
| 2026-05-14 12:00 |
02:49:17.68 |
+17:51:15.9 |
HIP 13165 |
23.40 |
| 2026-05-15 00:00 |
02:50:10.86 |
+17:55:25.5 |
HIP 13165 |
30.35 |
| 2026-05-15 12:00 |
02:51:04.12 |
+17:59:34.4 |
HIP 13108 |
40.12 |
| 2026-05-16 00:00 |
02:51:57.44 |
+18:03:42.6 |
HIP 13496 |
43.04 |
| 2026-05-16 12:00 |
02:52:50.83 |
+18:07:50.2 |
HIP 13496 |
33.00 |
| 2026-05-17 00:00 |
02:53:44.28 |
+18:11:57.1 |
HIP 13496 |
26.11 |
| 2026-05-17 12:00 |
02:54:37.81 |
+18:16:03.3 |
HIP 13654 |
17.22 |
| 2026-05-18 00:00 |
02:55:31.40 |
+18:20:08.8 |
HIP 13654 |
4.07 |
| 2026-05-18 12:00 |
02:56:25.05 |
+18:24:13.6 |
HIP 13654 |
9.69 |
| 2026-05-19 00:00 |
02:57:18.77 |
+18:28:17.6 |
HIP 13654 |
23.00 |
| 2026-05-19 12:00 |
02:58:12.56 |
+18:32:21.0 |
HIP 13654 |
36.36 |
| 2026-05-20 00:00 |
02:59:06.41 |
+18:36:23.6 |
HIP 13855 |
38.71 |
| 2026-05-20 12:00 |
03:00:00.32 |
+18:40:25.5 |
HIP 14141 |
35.87 |
| 2026-05-21 00:00 |
03:00:54.30 |
+18:44:26.6 |
HIP 14141 |
27.02 |
| 2026-05-21 12:00 |
03:01:48.35 |
+18:48:27.0 |
HIP 14140 |
18.26 |
| 2026-05-22 00:00 |
03:02:42.45 |
+18:52:26.6 |
HIP 14140 |
13.78 |
| 2026-05-22 12:00 |
03:03:36.62 |
+18:56:25.5 |
HIP 14140 |
20.15 |
| 2026-05-23 00:00 |
03:04:30.86 |
+19:00:23.6 |
HIP 14391 |
24.91 |
| 2026-05-23 12:00 |
03:05:25.15 |
+19:04:20.9 |
HIP 14391 |
23.08 |
| 2026-05-24 00:00 |
03:06:19.51 |
+19:08:17.4 |
HIP 14493 |
18.10 |
| 2026-05-24 12:00 |
03:07:13.93 |
+19:12:13.2 |
HIP 14493 |
9.67 |
| 2026-05-25 00:00 |
03:08:08.42 |
+19:16:08.2 |
HIP 14493 |
14.84 |
| 2026-05-25 12:00 |
03:09:02.96 |
+19:20:02.3 |
HIP 14672 |
7.97 |
| 2026-05-26 00:00 |
03:09:57.57 |
+19:23:55.7 |
HIP 14672 |
5.52 |
| 2026-05-26 12:00 |
03:10:52.24 |
+19:27:48.3 |
HIP 14672 |
18.96 |
| 2026-05-27 00:00 |
03:11:46.98 |
+19:31:40.0 |
HIP 14838 |
12.13 |
| 2026-05-27 12:00 |
03:12:41.77 |
+19:35:30.9 |
HIP 14838 |
17.12 |
| 2026-05-28 00:00 |
03:13:36.63 |
+19:39:21.0 |
HIP 14838 |
28.32 |
| 2026-05-28 12:00 |
03:14:31.55 |
+19:43:10.3 |
HIP 15227 |
34.21 |
| 2026-05-29 00:00 |
03:15:26.53 |
+19:46:58.7 |
HIP 15227 |
29.47 |
| 2026-05-29 12:00 |
03:16:21.57 |
+19:50:46.3 |
HIP 15227 |
30.51 |
| 2026-05-30 00:00 |
03:17:16.67 |
+19:54:33.1 |
HIP 15227 |
36.84 |
| 2026-05-30 12:00 |
03:18:11.84 |
+19:58:19.0 |
HIP 15509 |
29.84 |
| 2026-05-31 00:00 |
03:19:07.06 |
+20:02:04.0 |
HIP 15509 |
18.01 |
| 2026-05-31 12:00 |
03:20:02.35 |
+20:05:48.2 |
HIP 15509 |
11.09 |
| 2026-06-01 00:00 |
03:20:57.69 |
+20:09:31.5 |
HIP 15509 |
16.93 |
| 2026-06-01 12:00 |
03:21:53.10 |
+20:13:13.9 |
HIP 15597 |
22.57 |
| 2026-06-02 00:00 |
03:22:48.57 |
+20:16:55.4 |
HIP 15737 |
27.61 |