メタデータ
| 項目 |
値 |
| Designation |
194P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2008-02-26T01:27:24.048000Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T15:48:58Z |
| Obs used |
152 |
| NEO |
- |
| M1 |
17.800 |
| K1 |
7.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-10-05.0000000 |
| e |
0.57432797 |
| q (au) |
1.705149 |
| a (au) |
4.005781 |
| i (deg) |
11.120766 |
| Ω (om, deg) |
352.049138 |
| ω (w, deg) |
130.540130 |
| M (ma, deg) |
161.897093 |
等級
散乱 + 全体線形
$$
M_a = (18.208 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.208 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.999 |
| 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) |
| 2026-03-26 00:00 |
18:25:40.31 |
-35:17:17.0 |
HIP 90332 |
11.10 |
| 2026-03-26 12:00 |
18:25:48.77 |
-35:18:17.3 |
HIP 90332 |
9.90 |
| 2026-03-27 00:00 |
18:25:57.01 |
-35:19:17.9 |
HIP 90332 |
8.96 |
| 2026-03-27 12:00 |
18:26:05.04 |
-35:20:18.6 |
HIP 90332 |
8.38 |
| 2026-03-28 00:00 |
18:26:12.85 |
-35:21:19.7 |
HIP 90332 |
8.18 |
| 2026-03-28 12:00 |
18:26:20.44 |
-35:22:20.9 |
HIP 90406 |
7.54 |
| 2026-03-29 00:00 |
18:26:27.81 |
-35:23:22.4 |
HIP 90406 |
7.29 |
| 2026-03-29 12:00 |
18:26:34.97 |
-35:24:24.2 |
HIP 90406 |
7.51 |
| 2026-03-30 00:00 |
18:26:41.90 |
-35:25:26.1 |
HIP 90406 |
8.13 |
| 2026-03-30 12:00 |
18:26:48.62 |
-35:26:28.3 |
HIP 90406 |
9.06 |
| 2026-03-31 00:00 |
18:26:55.11 |
-35:27:30.7 |
HIP 90406 |
10.20 |
| 2026-03-31 12:00 |
18:27:01.38 |
-35:28:33.4 |
HIP 90406 |
11.46 |
| 2026-04-01 00:00 |
18:27:07.43 |
-35:29:36.2 |
HIP 90406 |
12.80 |
| 2026-04-01 12:00 |
18:27:13.25 |
-35:30:39.3 |
HIP 90406 |
14.19 |
| 2026-04-02 00:00 |
18:27:18.85 |
-35:31:42.6 |
HIP 90406 |
15.59 |
| 2026-04-02 12:00 |
18:27:24.23 |
-35:32:46.1 |
HIP 90526 |
16.69 |
| 2026-04-03 00:00 |
18:27:29.38 |
-35:33:49.9 |
HIP 90526 |
16.84 |
| 2026-04-03 12:00 |
18:27:34.30 |
-35:34:53.8 |
HIP 90526 |
17.15 |
| 2026-04-04 00:00 |
18:27:39.00 |
-35:35:58.0 |
HIP 90526 |
17.60 |
| 2026-04-04 12:00 |
18:27:43.47 |
-35:37:02.3 |
HIP 90526 |
18.17 |
| 2026-04-05 00:00 |
18:27:47.71 |
-35:38:06.8 |
HIP 90526 |
18.85 |
| 2026-04-05 12:00 |
18:27:51.72 |
-35:39:11.6 |
HIP 90526 |
19.62 |
| 2026-04-06 00:00 |
18:27:55.50 |
-35:40:16.5 |
HIP 90526 |
20.47 |
| 2026-04-06 12:00 |
18:27:59.05 |
-35:41:21.6 |
HIP 90452 |
20.90 |
| 2026-04-07 00:00 |
18:28:02.37 |
-35:42:26.9 |
HIP 90452 |
20.14 |
| 2026-04-07 12:00 |
18:28:05.45 |
-35:43:32.4 |
HIP 90452 |
19.41 |
| 2026-04-08 00:00 |
18:28:08.30 |
-35:44:38.1 |
HIP 90452 |
18.70 |
| 2026-04-08 12:00 |
18:28:10.92 |
-35:45:43.9 |
HIP 90452 |
18.03 |
| 2026-04-09 00:00 |
18:28:13.31 |
-35:46:49.9 |
HIP 90452 |
17.39 |
| 2026-04-09 12:00 |
18:28:15.46 |
-35:47:56.1 |
HIP 90452 |
16.78 |
| 2026-04-10 00:00 |
18:28:17.37 |
-35:49:02.4 |
HIP 90452 |
16.19 |
| 2026-04-10 12:00 |
18:28:19.05 |
-35:50:08.9 |
HIP 90452 |
15.64 |
| 2026-04-11 00:00 |
18:28:20.49 |
-35:51:15.5 |
HIP 90452 |
15.12 |
| 2026-04-11 12:00 |
18:28:21.69 |
-35:52:22.3 |
HIP 90452 |
14.62 |
| 2026-04-12 00:00 |
18:28:22.66 |
-35:53:29.2 |
HIP 90452 |
14.16 |
| 2026-04-12 12:00 |
18:28:23.39 |
-35:54:36.2 |
HIP 90452 |
13.73 |
| 2026-04-13 00:00 |
18:28:23.87 |
-35:55:43.4 |
HIP 90452 |
13.34 |
| 2026-04-13 12:00 |
18:28:24.12 |
-35:56:50.6 |
HIP 90452 |
12.99 |
| 2026-04-14 00:00 |
18:28:24.13 |
-35:57:58.0 |
HIP 90452 |
12.68 |
| 2026-04-14 12:00 |
18:28:23.89 |
-35:59:05.5 |
HIP 90452 |
12.41 |
| 2026-04-15 00:00 |
18:28:23.42 |
-36:00:13.1 |
HIP 90452 |
12.20 |
| 2026-04-15 12:00 |
18:28:22.71 |
-36:01:20.8 |
HIP 90452 |
12.04 |
| 2026-04-16 00:00 |
18:28:21.75 |
-36:02:28.6 |
HIP 90543 |
11.47 |