メタデータ
| 項目 |
値 |
| Designation |
286P/Christensen |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-05-13T11:04:06.790080Z |
| Orbit solution date (soln_date, UTC) |
2024-06-14T15:42:22Z |
| Obs used |
470 |
| NEO |
- |
| M1 |
16.000 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-04-23.0000000 |
| e |
0.42417674 |
| q (au) |
2.369655 |
| a (au) |
4.115246 |
| i (deg) |
17.038782 |
| Ω (om, deg) |
283.947999 |
| ω (w, deg) |
24.688564 |
| M (ma, deg) |
185.095652 |
等級
散乱 + 全体線形
$$
M_a = (17.621 + 2.108\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.621 |
| n |
2.108 |
| gf |
1.000 |
| gb |
-0.682 |
| k |
0.800 |
| 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
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 |
08:34:36.90 |
+12:13:04.2 |
HIP 42222 |
41.67 |
| 2026-07-29 12:00 |
08:34:58.55 |
+12:11:21.1 |
HIP 42222 |
36.94 |
| 2026-07-30 00:00 |
08:35:20.19 |
+12:09:37.7 |
HIP 42222 |
32.48 |
| 2026-07-30 12:00 |
08:35:41.83 |
+12:07:54.0 |
HIP 42222 |
28.40 |
| 2026-07-31 00:00 |
08:36:03.47 |
+12:06:09.9 |
HIP 42222 |
24.91 |
| 2026-07-31 12:00 |
08:36:25.10 |
+12:04:25.5 |
HIP 42222 |
22.26 |
| 2026-08-01 00:00 |
08:36:46.72 |
+12:02:40.7 |
HIP 42222 |
20.80 |
| 2026-08-01 12:00 |
08:37:08.33 |
+12:00:55.6 |
HIP 42222 |
20.78 |
| 2026-08-02 00:00 |
08:37:29.94 |
+11:59:10.1 |
HIP 42222 |
22.20 |
| 2026-08-02 12:00 |
08:37:51.54 |
+11:57:24.3 |
HIP 42222 |
24.81 |
| 2026-08-03 00:00 |
08:38:13.13 |
+11:55:38.2 |
HIP 42222 |
28.28 |
| 2026-08-03 12:00 |
08:38:34.71 |
+11:53:51.8 |
HIP 42346 |
28.25 |
| 2026-08-04 00:00 |
08:38:56.28 |
+11:52:05.0 |
HIP 42499 |
24.60 |
| 2026-08-04 12:00 |
08:39:17.84 |
+11:50:17.9 |
HIP 42499 |
20.52 |
| 2026-08-05 00:00 |
08:39:39.38 |
+11:48:30.5 |
HIP 42499 |
17.30 |
| 2026-08-05 12:00 |
08:40:00.92 |
+11:46:42.7 |
HIP 42499 |
15.48 |
| 2026-08-06 00:00 |
08:40:22.45 |
+11:44:54.6 |
HIP 42499 |
15.54 |
| 2026-08-06 12:00 |
08:40:43.96 |
+11:43:06.2 |
HIP 42499 |
17.47 |
| 2026-08-07 00:00 |
08:41:05.46 |
+11:41:17.5 |
HIP 42499 |
20.76 |
| 2026-08-07 12:00 |
08:41:26.94 |
+11:39:28.5 |
HIP 42499 |
24.87 |
| 2026-08-08 00:00 |
08:41:48.41 |
+11:37:39.1 |
HIP 42499 |
29.45 |
| 2026-08-08 12:00 |
08:42:09.86 |
+11:35:49.5 |
HIP 42839 |
30.56 |
| 2026-08-09 00:00 |
08:42:31.30 |
+11:33:59.5 |
HIP 42839 |
25.48 |
| 2026-08-09 12:00 |
08:42:52.72 |
+11:32:09.2 |
HIP 42839 |
20.65 |
| 2026-08-10 00:00 |
08:43:14.12 |
+11:30:18.6 |
HIP 42839 |
16.29 |
| 2026-08-10 12:00 |
08:43:35.51 |
+11:28:27.7 |
HIP 42839 |
12.89 |
| 2026-08-11 00:00 |
08:43:56.87 |
+11:26:36.5 |
HIP 42839 |
11.33 |
| 2026-08-11 12:00 |
08:44:18.22 |
+11:24:45.0 |
HIP 42839 |
12.34 |
| 2026-08-12 00:00 |
08:44:39.55 |
+11:22:53.2 |
HIP 42839 |
15.41 |
| 2026-08-12 12:00 |
08:45:00.85 |
+11:21:01.2 |
HIP 42839 |
19.60 |
| 2026-08-13 00:00 |
08:45:22.13 |
+11:19:08.8 |
HIP 42839 |
24.33 |
| 2026-08-13 12:00 |
08:45:43.39 |
+11:17:16.2 |
HIP 43130 |
22.16 |
| 2026-08-14 00:00 |
08:46:04.63 |
+11:15:23.2 |
HIP 43137 |
17.19 |
| 2026-08-14 12:00 |
08:46:25.84 |
+11:13:30.0 |
HIP 43137 |
11.66 |
| 2026-08-15 00:00 |
08:46:47.03 |
+11:11:36.6 |
HIP 43137 |
6.14 |
| 2026-08-15 12:00 |
08:47:08.20 |
+11:09:42.8 |
HIP 43137 |
0.67 |
| 2026-08-16 00:00 |
08:47:29.33 |
+11:07:48.8 |
HIP 43138 |
4.83 |
| 2026-08-16 12:00 |
08:47:50.44 |
+11:05:54.5 |
HIP 43138 |
10.34 |
| 2026-08-17 00:00 |
08:48:11.53 |
+11:04:00.0 |
HIP 43138 |
15.86 |
| 2026-08-17 12:00 |
08:48:32.58 |
+11:02:05.1 |
HIP 43138 |
21.37 |
| 2026-08-18 00:00 |
08:48:53.61 |
+11:00:10.0 |
HIP 43138 |
26.87 |
| 2026-08-18 12:00 |
08:49:14.60 |
+10:58:14.7 |
HIP 43387 |
30.57 |
| 2026-08-19 00:00 |
08:49:35.57 |
+10:56:19.1 |
HIP 43387 |
30.07 |