256P/LINEAR
メタデータ
| 項目 |
値 |
| Designation |
256P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-03-17T12:37:58.005120Z |
| Orbit solution date (soln_date, UTC) |
2024-05-30T01:12:33Z |
| Obs used |
270 |
| NEO |
- |
| M1 |
12.000 |
| K1 |
13.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-02-12.0000000 |
| e |
0.41935612 |
| q (au) |
2.689114 |
| a (au) |
4.631263 |
| i (deg) |
27.631658 |
| Ω (om, deg) |
81.436538 |
| ω (w, deg) |
124.120383 |
| M (ma, deg) |
68.874689 |
等級
散乱 + 全体線形
$$
M_a = (10.702 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.702 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-02-03 00:00 |
23:35:50.04 |
-29:01:57.8 |
HIP 116408 |
18.82 |
| 2026-02-03 12:00 |
23:36:11.77 |
-28:58:49.5 |
HIP 116408 |
18.29 |
| 2026-02-04 00:00 |
23:36:33.55 |
-28:55:41.7 |
HIP 116408 |
19.50 |
| 2026-02-04 12:00 |
23:36:55.39 |
-28:52:34.1 |
HIP 116625 |
16.44 |
| 2026-02-05 00:00 |
23:37:17.27 |
-28:49:27.0 |
HIP 116625 |
10.81 |
| 2026-02-05 12:00 |
23:37:39.21 |
-28:46:20.1 |
HIP 116625 |
5.35 |
| 2026-02-06 00:00 |
23:38:01.20 |
-28:43:13.6 |
HIP 116625 |
2.44 |
| 2026-02-06 12:00 |
23:38:23.24 |
-28:40:07.5 |
HIP 116625 |
7.00 |
| 2026-02-07 00:00 |
23:38:45.32 |
-28:37:01.8 |
HIP 116625 |
12.58 |
| 2026-02-07 12:00 |
23:39:07.46 |
-28:33:56.4 |
HIP 116747 |
11.04 |
| 2026-02-08 00:00 |
23:39:29.64 |
-28:30:51.3 |
HIP 116747 |
11.78 |
| 2026-02-08 12:00 |
23:39:51.87 |
-28:27:46.7 |
HIP 116791 |
7.87 |
| 2026-02-09 00:00 |
23:40:14.14 |
-28:24:42.4 |
HIP 116791 |
3.17 |
| 2026-02-09 12:00 |
23:40:36.46 |
-28:21:38.5 |
HIP 116791 |
5.02 |
| 2026-02-10 00:00 |
23:40:58.82 |
-28:18:35.0 |
HIP 116791 |
10.37 |
| 2026-02-10 12:00 |
23:41:21.23 |
-28:15:31.9 |
HIP 116791 |
16.04 |
| 2026-02-11 00:00 |
23:41:43.68 |
-28:12:29.2 |
HIP 116964 |
11.41 |
| 2026-02-11 12:00 |
23:42:06.17 |
-28:09:26.9 |
HIP 116964 |
6.50 |
| 2026-02-12 00:00 |
23:42:28.71 |
-28:06:25.0 |
HIP 116964 |
4.66 |
| 2026-02-12 12:00 |
23:42:51.29 |
-28:03:23.6 |
HIP 116964 |
8.30 |
| 2026-02-13 00:00 |
23:43:13.90 |
-28:00:22.5 |
HIP 117064 |
9.81 |
| 2026-02-13 12:00 |
23:43:36.56 |
-27:57:21.9 |
HIP 117064 |
6.97 |
| 2026-02-14 00:00 |
23:43:59.25 |
-27:54:21.6 |
HIP 117064 |
8.31 |
| 2026-02-14 12:00 |
23:44:21.98 |
-27:51:21.9 |
HIP 117064 |
12.56 |
| 2026-02-15 00:00 |
23:44:44.75 |
-27:48:22.5 |
HIP 117064 |
17.74 |
| 2026-02-15 12:00 |
23:45:07.56 |
-27:45:23.6 |
HIP 117189 |
15.81 |
| 2026-02-16 00:00 |
23:45:30.40 |
-27:42:25.2 |
HIP 117189 |
11.39 |
| 2026-02-16 12:00 |
23:45:53.28 |
-27:39:27.2 |
HIP 117189 |
8.88 |
| 2026-02-17 00:00 |
23:46:16.19 |
-27:36:29.6 |
HIP 117189 |
9.86 |
| 2026-02-17 12:00 |
23:46:39.13 |
-27:33:32.5 |
HIP 117189 |
13.60 |
| 2026-02-18 00:00 |
23:47:02.11 |
-27:30:35.9 |
HIP 117189 |
18.50 |
| 2026-02-18 12:00 |
23:47:25.12 |
-27:27:39.8 |
HIP 117440 |
18.74 |
| 2026-02-19 00:00 |
23:47:48.16 |
-27:24:44.1 |
HIP 117440 |
15.27 |
| 2026-02-19 12:00 |
23:48:11.23 |
-27:21:48.9 |
HIP 117440 |
13.56 |
| 2026-02-20 00:00 |
23:48:34.33 |
-27:18:54.3 |
HIP 117440 |
14.28 |
| 2026-02-20 12:00 |
23:48:57.46 |
-27:16:00.1 |
HIP 117440 |
17.12 |
| 2026-02-21 00:00 |
23:49:20.61 |
-27:13:06.4 |
HIP 117532 |
12.07 |
| 2026-02-21 12:00 |
23:49:43.80 |
-27:10:13.2 |
HIP 117532 |
6.18 |
| 2026-02-22 00:00 |
23:50:07.01 |
-27:07:20.5 |
HIP 117532 |
0.66 |
| 2026-02-22 12:00 |
23:50:30.24 |
-27:04:28.3 |
HIP 117532 |
5.71 |
| 2026-02-23 00:00 |
23:50:53.50 |
-27:01:36.7 |
HIP 117532 |
11.61 |
| 2026-02-23 12:00 |
23:51:16.79 |
-26:58:45.5 |
HIP 117532 |
17.52 |
| 2026-02-24 00:00 |
23:51:40.10 |
-26:55:54.9 |
HIP 117532 |
23.44 |