メタデータ
| 項目 |
値 |
| Designation |
492P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-10-19T14:24:35.294400Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:43:24Z |
| Obs used |
802 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
9.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-18T11:25:10.848000Z |
| Discovery magnitude (MPC) |
19.90 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-12-01.0000000 |
| e |
0.69164881 |
| q (au) |
1.771711 |
| a (au) |
5.745757 |
| i (deg) |
11.457418 |
| Ω (om, deg) |
11.488927 |
| ω (w, deg) |
41.023047 |
| M (ma, deg) |
81.466296 |
等級
散乱 + 全体線形
$$
M_a = (13.416 + 4.211\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.416 |
| n |
4.211 |
| gf |
0.999 |
| gb |
-1.000 |
| 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) |
| 2026-07-29 00:00 |
11:59:41.10 |
+00:46:36.9 |
HIP 58445 |
17.53 |
| 2026-07-29 12:00 |
11:59:55.91 |
+00:44:40.7 |
HIP 58445 |
18.37 |
| 2026-07-30 00:00 |
12:00:10.79 |
+00:42:44.1 |
HIP 58445 |
20.07 |
| 2026-07-30 12:00 |
12:00:25.75 |
+00:40:47.1 |
HIP 58445 |
22.45 |
| 2026-07-31 00:00 |
12:00:40.77 |
+00:38:49.7 |
HIP 58445 |
25.33 |
| 2026-07-31 12:00 |
12:00:55.86 |
+00:36:52.0 |
HIP 58700 |
21.57 |
| 2026-08-01 00:00 |
12:01:11.02 |
+00:34:53.8 |
HIP 58700 |
17.60 |
| 2026-08-01 12:00 |
12:01:26.25 |
+00:32:55.3 |
HIP 58700 |
13.79 |
| 2026-08-02 00:00 |
12:01:41.55 |
+00:30:56.4 |
HIP 58700 |
10.34 |
| 2026-08-02 12:00 |
12:01:56.91 |
+00:28:57.1 |
HIP 58700 |
7.80 |
| 2026-08-03 00:00 |
12:02:12.34 |
+00:26:57.5 |
HIP 58700 |
7.22 |
| 2026-08-03 12:00 |
12:02:27.84 |
+00:24:57.5 |
HIP 58700 |
9.01 |
| 2026-08-04 00:00 |
12:02:43.40 |
+00:22:57.1 |
HIP 58700 |
12.20 |
| 2026-08-04 12:00 |
12:02:59.02 |
+00:20:56.4 |
HIP 58700 |
15.97 |
| 2026-08-05 00:00 |
12:03:14.71 |
+00:18:55.3 |
HIP 58700 |
20.01 |
| 2026-08-05 12:00 |
12:03:30.46 |
+00:16:53.9 |
HIP 58700 |
24.20 |
| 2026-08-06 00:00 |
12:03:46.28 |
+00:14:52.1 |
HIP 58700 |
28.47 |
| 2026-08-06 12:00 |
12:04:02.16 |
+00:12:50.0 |
HIP 58908 |
28.80 |
| 2026-08-07 00:00 |
12:04:18.10 |
+00:10:47.5 |
HIP 58908 |
25.50 |
| 2026-08-07 12:00 |
12:04:34.10 |
+00:08:44.7 |
HIP 58908 |
22.61 |
| 2026-08-08 00:00 |
12:04:50.16 |
+00:06:41.6 |
HIP 58908 |
20.30 |
| 2026-08-08 12:00 |
12:05:06.28 |
+00:04:38.2 |
HIP 58908 |
18.80 |
| 2026-08-09 00:00 |
12:05:22.46 |
+00:02:34.4 |
HIP 58908 |
18.33 |
| 2026-08-09 12:00 |
12:05:38.69 |
+00:00:30.3 |
HIP 58908 |
18.98 |
| 2026-08-10 00:00 |
12:05:54.99 |
-00:01:34.1 |
HIP 58908 |
20.64 |
| 2026-08-10 12:00 |
12:06:11.34 |
-00:03:38.8 |
HIP 58908 |
23.11 |
| 2026-08-11 00:00 |
12:06:27.75 |
-00:05:43.8 |
HIP 58908 |
26.17 |
| 2026-08-11 12:00 |
12:06:44.22 |
-00:07:49.2 |
HIP 58908 |
29.65 |
| 2026-08-12 00:00 |
12:07:00.74 |
-00:09:54.8 |
HIP 59198 |
27.98 |
| 2026-08-12 12:00 |
12:07:17.31 |
-00:12:00.7 |
HIP 59198 |
23.55 |
| 2026-08-13 00:00 |
12:07:33.94 |
-00:14:06.9 |
HIP 59198 |
19.21 |
| 2026-08-13 12:00 |
12:07:50.62 |
-00:16:13.4 |
HIP 59198 |
15.05 |
| 2026-08-14 00:00 |
12:08:07.36 |
-00:18:20.2 |
HIP 59198 |
11.29 |
| 2026-08-14 12:00 |
12:08:24.14 |
-00:20:27.2 |
HIP 59208 |
7.47 |
| 2026-08-15 00:00 |
12:08:40.98 |
-00:22:34.6 |
HIP 59208 |
5.05 |
| 2026-08-15 12:00 |
12:08:57.87 |
-00:24:42.1 |
HIP 59208 |
6.30 |
| 2026-08-16 00:00 |
12:09:14.80 |
-00:26:50.0 |
HIP 59208 |
9.94 |
| 2026-08-16 12:00 |
12:09:31.78 |
-00:28:58.1 |
HIP 59208 |
14.26 |
| 2026-08-17 00:00 |
12:09:48.82 |
-00:31:06.4 |
HIP 59208 |
18.80 |
| 2026-08-17 12:00 |
12:10:05.90 |
-00:33:15.0 |
HIP 59208 |
23.44 |
| 2026-08-18 00:00 |
12:10:23.02 |
-00:35:23.9 |
HIP 59476 |
24.12 |
| 2026-08-18 12:00 |
12:10:40.19 |
-00:37:32.9 |
HIP 59476 |
20.79 |
| 2026-08-19 00:00 |
12:10:57.41 |
-00:39:42.3 |
HIP 59476 |
18.13 |