197P/LINEAR
メタデータ
| 項目 |
値 |
| Designation |
197P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-05-18T23:56:01.968000Z |
| Orbit solution date (soln_date, UTC) |
2023-10-20T22:43:21Z |
| Obs used |
325 |
| NEO |
Yes |
| M1 |
18.200 |
| K1 |
5.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-09-26.0000000 |
| e |
0.62994097 |
| q (au) |
1.061109 |
| a (au) |
2.867406 |
| i (deg) |
25.556064 |
| Ω (om, deg) |
66.395886 |
| ω (w, deg) |
188.752044 |
| M (ma, deg) |
238.004767 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 3.342\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
3.342 |
| gf |
0.971 |
| gb |
-1.000 |
| k |
0.969 |
| δ90 |
4.109 |
| 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 |
05:06:23.25 |
+35:14:34.6 |
HIP 23765 |
19.22 |
| 2026-02-03 12:00 |
05:06:10.64 |
+35:13:59.1 |
HIP 23765 |
20.15 |
| 2026-02-04 00:00 |
05:05:58.35 |
+35:13:23.4 |
HIP 23765 |
21.35 |
| 2026-02-04 12:00 |
05:05:46.37 |
+35:12:47.6 |
HIP 23765 |
22.75 |
| 2026-02-05 00:00 |
05:05:34.70 |
+35:12:11.7 |
HIP 23765 |
24.31 |
| 2026-02-05 12:00 |
05:05:23.35 |
+35:11:35.7 |
HIP 23765 |
25.97 |
| 2026-02-06 00:00 |
05:05:12.31 |
+35:10:59.6 |
HIP 23765 |
27.71 |
| 2026-02-06 12:00 |
05:05:01.59 |
+35:10:23.4 |
HIP 23765 |
29.49 |
| 2026-02-07 00:00 |
05:04:51.18 |
+35:09:47.1 |
HIP 23765 |
31.29 |
| 2026-02-07 12:00 |
05:04:41.09 |
+35:09:10.8 |
HIP 23765 |
33.10 |
| 2026-02-08 00:00 |
05:04:31.32 |
+35:08:34.5 |
HIP 23765 |
34.90 |
| 2026-02-08 12:00 |
05:04:21.86 |
+35:07:58.1 |
HIP 23765 |
36.69 |
| 2026-02-09 00:00 |
05:04:12.72 |
+35:07:21.8 |
HIP 23765 |
38.45 |
| 2026-02-09 12:00 |
05:04:03.89 |
+35:06:45.4 |
HIP 23584 |
39.18 |
| 2026-02-10 00:00 |
05:03:55.38 |
+35:06:09.1 |
HIP 23584 |
38.72 |
| 2026-02-10 12:00 |
05:03:47.19 |
+35:05:32.8 |
HIP 23584 |
38.34 |
| 2026-02-11 00:00 |
05:03:39.32 |
+35:04:56.6 |
HIP 23584 |
38.02 |
| 2026-02-11 12:00 |
05:03:31.76 |
+35:04:20.4 |
HIP 23584 |
37.77 |
| 2026-02-12 00:00 |
05:03:24.51 |
+35:03:44.3 |
HIP 23584 |
37.57 |
| 2026-02-12 12:00 |
05:03:17.58 |
+35:03:08.3 |
HIP 23584 |
37.42 |
| 2026-02-13 00:00 |
05:03:10.97 |
+35:02:32.4 |
HIP 23584 |
37.32 |
| 2026-02-13 12:00 |
05:03:04.68 |
+35:01:56.5 |
HIP 23584 |
37.24 |
| 2026-02-14 00:00 |
05:02:58.70 |
+35:01:20.9 |
HIP 23584 |
37.20 |
| 2026-02-14 12:00 |
05:02:53.03 |
+35:00:45.3 |
HIP 23337 |
36.87 |
| 2026-02-15 00:00 |
05:02:47.68 |
+35:00:09.9 |
HIP 23337 |
35.76 |
| 2026-02-15 12:00 |
05:02:42.64 |
+34:59:34.6 |
HIP 23337 |
34.70 |
| 2026-02-16 00:00 |
05:02:37.92 |
+34:58:59.5 |
HIP 23337 |
33.69 |
| 2026-02-16 12:00 |
05:02:33.51 |
+34:58:24.6 |
HIP 23337 |
32.72 |
| 2026-02-17 00:00 |
05:02:29.41 |
+34:57:49.8 |
HIP 23337 |
31.79 |
| 2026-02-17 12:00 |
05:02:25.63 |
+34:57:15.3 |
HIP 23337 |
30.90 |
| 2026-02-18 00:00 |
05:02:22.16 |
+34:56:40.9 |
HIP 23337 |
30.05 |
| 2026-02-18 12:00 |
05:02:19.00 |
+34:56:06.8 |
HIP 23337 |
29.24 |
| 2026-02-19 00:00 |
05:02:16.14 |
+34:55:32.8 |
HIP 23337 |
28.47 |
| 2026-02-19 12:00 |
05:02:13.60 |
+34:54:59.2 |
HIP 23337 |
27.73 |
| 2026-02-20 00:00 |
05:02:11.37 |
+34:54:25.7 |
HIP 23337 |
27.02 |
| 2026-02-20 12:00 |
05:02:09.44 |
+34:53:52.5 |
HIP 23337 |
26.35 |
| 2026-02-21 00:00 |
05:02:07.82 |
+34:53:19.6 |
HIP 23337 |
25.71 |
| 2026-02-21 12:00 |
05:02:06.50 |
+34:52:46.9 |
HIP 23337 |
25.10 |
| 2026-02-22 00:00 |
05:02:05.49 |
+34:52:14.5 |
HIP 23337 |
24.52 |
| 2026-02-22 12:00 |
05:02:04.79 |
+34:51:42.4 |
HIP 23337 |
23.98 |
| 2026-02-23 00:00 |
05:02:04.38 |
+34:51:10.5 |
HIP 23337 |
23.47 |
| 2026-02-23 12:00 |
05:02:04.28 |
+34:50:39.0 |
HIP 23337 |
23.00 |
| 2026-02-24 00:00 |
05:02:04.48 |
+34:50:07.7 |
HIP 23337 |
22.56 |