メタデータ
| 項目 |
値 |
| Designation |
418P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-04-19T02:07:15.358080Z |
| Orbit solution date (soln_date, UTC) |
2022-10-07T00:44:00Z |
| Obs used |
775 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-12-23T11:39:09.792000Z |
| Discovery magnitude (MPC) |
21.70 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-02-05.0000000 |
| e |
0.66371734 |
| q (au) |
1.715751 |
| a (au) |
5.102109 |
| i (deg) |
5.780390 |
| Ω (om, deg) |
277.862905 |
| ω (w, deg) |
306.887500 |
| M (ma, deg) |
56.180600 |
等級
散乱 + 全体線形
$$
M_a = (10.828 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.828 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.850 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
02:39:03.85 |
+20:44:13.6 |
HIP 12238 |
23.09 |
| 2026-07-29 12:00 |
02:39:08.19 |
+20:44:49.4 |
HIP 12238 |
24.26 |
| 2026-07-30 00:00 |
02:39:12.42 |
+20:45:24.7 |
HIP 12238 |
25.41 |
| 2026-07-30 12:00 |
02:39:16.54 |
+20:45:59.6 |
HIP 12238 |
26.53 |
| 2026-07-31 00:00 |
02:39:20.55 |
+20:46:34.1 |
HIP 12238 |
27.62 |
| 2026-07-31 12:00 |
02:39:24.45 |
+20:47:08.0 |
HIP 12238 |
28.69 |
| 2026-08-01 00:00 |
02:39:28.23 |
+20:47:41.5 |
HIP 12468 |
27.84 |
| 2026-08-01 12:00 |
02:39:31.90 |
+20:48:14.6 |
HIP 12468 |
26.93 |
| 2026-08-02 00:00 |
02:39:35.46 |
+20:48:47.1 |
HIP 12468 |
26.03 |
| 2026-08-02 12:00 |
02:39:38.91 |
+20:49:19.2 |
HIP 12468 |
25.17 |
| 2026-08-03 00:00 |
02:39:42.24 |
+20:49:50.9 |
HIP 12468 |
24.33 |
| 2026-08-03 12:00 |
02:39:45.46 |
+20:50:22.0 |
HIP 12468 |
23.52 |
| 2026-08-04 00:00 |
02:39:48.57 |
+20:50:52.7 |
HIP 12468 |
22.74 |
| 2026-08-04 12:00 |
02:39:51.56 |
+20:51:22.8 |
HIP 12468 |
21.98 |
| 2026-08-05 00:00 |
02:39:54.44 |
+20:51:52.5 |
HIP 12468 |
21.25 |
| 2026-08-05 12:00 |
02:39:57.20 |
+20:52:21.7 |
HIP 12468 |
20.55 |
| 2026-08-06 00:00 |
02:39:59.84 |
+20:52:50.5 |
HIP 12468 |
19.87 |
| 2026-08-06 12:00 |
02:40:02.37 |
+20:53:18.7 |
HIP 12468 |
19.22 |
| 2026-08-07 00:00 |
02:40:04.77 |
+20:53:46.4 |
HIP 12468 |
18.59 |
| 2026-08-07 12:00 |
02:40:07.07 |
+20:54:13.6 |
HIP 12468 |
17.98 |
| 2026-08-08 00:00 |
02:40:09.24 |
+20:54:40.3 |
HIP 12468 |
17.40 |
| 2026-08-08 12:00 |
02:40:11.30 |
+20:55:06.5 |
HIP 12468 |
16.85 |
| 2026-08-09 00:00 |
02:40:13.23 |
+20:55:32.2 |
HIP 12468 |
16.31 |
| 2026-08-09 12:00 |
02:40:15.05 |
+20:55:57.4 |
HIP 12468 |
15.80 |
| 2026-08-10 00:00 |
02:40:16.75 |
+20:56:22.1 |
HIP 12468 |
15.30 |
| 2026-08-10 12:00 |
02:40:18.33 |
+20:56:46.3 |
HIP 12468 |
14.83 |
| 2026-08-11 00:00 |
02:40:19.79 |
+20:57:09.9 |
HIP 12468 |
14.38 |
| 2026-08-11 12:00 |
02:40:21.12 |
+20:57:33.0 |
HIP 12468 |
13.94 |
| 2026-08-12 00:00 |
02:40:22.34 |
+20:57:55.6 |
HIP 12468 |
13.52 |
| 2026-08-12 12:00 |
02:40:23.43 |
+20:58:17.7 |
HIP 12468 |
13.12 |
| 2026-08-13 00:00 |
02:40:24.41 |
+20:58:39.2 |
HIP 12468 |
12.73 |
| 2026-08-13 12:00 |
02:40:25.26 |
+20:59:00.2 |
HIP 12468 |
12.36 |
| 2026-08-14 00:00 |
02:40:25.99 |
+20:59:20.6 |
HIP 12468 |
12.00 |
| 2026-08-14 12:00 |
02:40:26.60 |
+20:59:40.6 |
HIP 12468 |
11.65 |
| 2026-08-15 00:00 |
02:40:27.08 |
+21:00:00.0 |
HIP 12468 |
11.32 |
| 2026-08-15 12:00 |
02:40:27.44 |
+21:00:18.8 |
HIP 12468 |
11.00 |
| 2026-08-16 00:00 |
02:40:27.69 |
+21:00:37.1 |
HIP 12468 |
10.69 |
| 2026-08-16 12:00 |
02:40:27.80 |
+21:00:54.9 |
HIP 12468 |
10.39 |
| 2026-08-17 00:00 |
02:40:27.80 |
+21:01:12.1 |
HIP 12468 |
10.11 |
| 2026-08-17 12:00 |
02:40:27.67 |
+21:01:28.8 |
HIP 12468 |
9.83 |
| 2026-08-18 00:00 |
02:40:27.42 |
+21:01:44.9 |
HIP 12468 |
9.57 |
| 2026-08-18 12:00 |
02:40:27.04 |
+21:02:00.4 |
HIP 12468 |
9.32 |
| 2026-08-19 00:00 |
02:40:26.54 |
+21:02:15.4 |
HIP 12468 |
9.09 |