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
$$
M_a = (20.000 + 3.258\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
3.258 |
| gf |
0.933 |
| gb |
-1.000 |
| k |
0.972 |
| δ90 |
4.153 |
| 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) |
| 2026-06-01 00:00 |
06:09:52.80 |
+34:40:17.9 |
HIP 29308 |
26.89 |
| 2026-06-01 12:00 |
06:10:26.93 |
+34:40:25.1 |
HIP 29308 |
25.06 |
| 2026-06-02 00:00 |
06:11:01.12 |
+34:40:32.3 |
HIP 29308 |
25.14 |
| 2026-06-02 12:00 |
06:11:35.39 |
+34:40:39.4 |
HIP 29308 |
27.13 |
| 2026-06-03 00:00 |
06:12:09.73 |
+34:40:46.3 |
HIP 29308 |
30.66 |
| 2026-06-03 12:00 |
06:12:44.14 |
+34:40:53.2 |
HIP 29308 |
35.28 |
| 2026-06-04 00:00 |
06:13:18.62 |
+34:41:00.0 |
HIP 29504 |
40.12 |
| 2026-06-04 12:00 |
06:13:53.17 |
+34:41:06.6 |
HIP 29504 |
41.34 |
| 2026-06-05 00:00 |
06:14:27.79 |
+34:41:13.2 |
HIP 29835 |
40.58 |
| 2026-06-05 12:00 |
06:15:02.47 |
+34:41:19.6 |
HIP 29835 |
35.59 |
| 2026-06-06 00:00 |
06:15:37.22 |
+34:41:25.9 |
HIP 29835 |
31.44 |
| 2026-06-06 12:00 |
06:16:12.04 |
+34:41:32.2 |
HIP 29835 |
28.51 |
| 2026-06-07 00:00 |
06:16:46.92 |
+34:41:38.3 |
HIP 29835 |
27.20 |
| 2026-06-07 12:00 |
06:17:21.87 |
+34:41:44.3 |
HIP 30056 |
27.21 |
| 2026-06-08 00:00 |
06:17:56.88 |
+34:41:50.2 |
HIP 30056 |
20.10 |
| 2026-06-08 12:00 |
06:18:31.95 |
+34:41:56.0 |
HIP 30056 |
13.08 |
| 2026-06-09 00:00 |
06:19:07.09 |
+34:42:01.6 |
HIP 30056 |
6.48 |
| 2026-06-09 12:00 |
06:19:42.29 |
+34:42:07.2 |
HIP 30056 |
4.16 |
| 2026-06-10 00:00 |
06:20:17.55 |
+34:42:12.6 |
HIP 30056 |
9.88 |
| 2026-06-10 12:00 |
06:20:52.88 |
+34:42:17.9 |
HIP 30270 |
15.81 |
| 2026-06-11 00:00 |
06:21:28.26 |
+34:42:23.1 |
HIP 30270 |
9.69 |
| 2026-06-11 12:00 |
06:22:03.70 |
+34:42:28.2 |
HIP 30270 |
6.62 |
| 2026-06-12 00:00 |
06:22:39.21 |
+34:42:33.1 |
HIP 30270 |
10.01 |
| 2026-06-12 12:00 |
06:23:14.77 |
+34:42:38.0 |
HIP 30270 |
16.23 |
| 2026-06-13 00:00 |
06:23:50.38 |
+34:42:42.7 |
HIP 30270 |
23.11 |
| 2026-06-13 12:00 |
06:24:26.06 |
+34:42:47.3 |
HIP 30499 |
26.13 |
| 2026-06-14 00:00 |
06:25:01.79 |
+34:42:51.7 |
HIP 30499 |
26.15 |
| 2026-06-14 12:00 |
06:25:37.57 |
+34:42:56.0 |
HIP 30499 |
28.15 |
| 2026-06-15 00:00 |
06:26:13.41 |
+34:43:00.3 |
HIP 30818 |
30.96 |
| 2026-06-15 12:00 |
06:26:49.30 |
+34:43:04.3 |
HIP 30818 |
24.56 |
| 2026-06-16 00:00 |
06:27:25.24 |
+34:43:08.3 |
HIP 30850 |
18.15 |
| 2026-06-16 12:00 |
06:28:01.24 |
+34:43:12.1 |
HIP 30850 |
12.16 |
| 2026-06-17 00:00 |
06:28:37.28 |
+34:43:15.8 |
HIP 30850 |
8.69 |
| 2026-06-17 12:00 |
06:29:13.38 |
+34:43:19.4 |
HIP 30850 |
10.62 |
| 2026-06-18 00:00 |
06:29:49.52 |
+34:43:22.9 |
HIP 31049 |
14.82 |
| 2026-06-18 12:00 |
06:30:25.71 |
+34:43:26.2 |
HIP 31049 |
8.90 |
| 2026-06-19 00:00 |
06:31:01.95 |
+34:43:29.4 |
HIP 31049 |
7.02 |
| 2026-06-19 12:00 |
06:31:38.24 |
+34:43:32.4 |
HIP 31049 |
11.42 |
| 2026-06-20 00:00 |
06:32:14.57 |
+34:43:35.4 |
HIP 31142 |
12.35 |
| 2026-06-20 12:00 |
06:32:50.94 |
+34:43:38.2 |
HIP 31142 |
15.72 |
| 2026-06-21 00:00 |
06:33:27.36 |
+34:43:40.9 |
HIP 31142 |
21.31 |
| 2026-06-21 12:00 |
06:34:03.83 |
+34:43:43.4 |
HIP 31431 |
18.90 |
| 2026-06-22 00:00 |
06:34:40.33 |
+34:43:45.8 |
HIP 31431 |
14.51 |