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
$$
M_a = (13.477 + 4.164\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.477 |
| n |
4.164 |
| gf |
1.000 |
| gb |
-0.503 |
| 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) |
| 2026-03-26 00:00 |
12:03:54.78 |
+02:22:34.9 |
HIP 58944 |
22.24 |
| 2026-03-26 12:00 |
12:03:37.00 |
+02:23:59.1 |
HIP 58944 |
26.79 |
| 2026-03-27 00:00 |
12:03:19.25 |
+02:25:22.8 |
HIP 58643 |
27.67 |
| 2026-03-27 12:00 |
12:03:01.56 |
+02:26:46.1 |
HIP 58643 |
23.55 |
| 2026-03-28 00:00 |
12:02:43.92 |
+02:28:08.9 |
HIP 58643 |
19.67 |
| 2026-03-28 12:00 |
12:02:26.33 |
+02:29:31.3 |
HIP 58643 |
16.19 |
| 2026-03-29 00:00 |
12:02:08.79 |
+02:30:53.1 |
HIP 58643 |
13.42 |
| 2026-03-29 12:00 |
12:01:51.31 |
+02:32:14.4 |
HIP 58643 |
11.83 |
| 2026-03-30 00:00 |
12:01:33.90 |
+02:33:35.2 |
HIP 58643 |
11.89 |
| 2026-03-30 12:00 |
12:01:16.55 |
+02:34:55.5 |
HIP 58643 |
13.56 |
| 2026-03-31 00:00 |
12:00:59.26 |
+02:36:15.2 |
HIP 58643 |
16.35 |
| 2026-03-31 12:00 |
12:00:42.04 |
+02:37:34.4 |
HIP 58643 |
19.76 |
| 2026-04-01 00:00 |
12:00:24.89 |
+02:38:53.0 |
HIP 58472 |
20.28 |
| 2026-04-01 12:00 |
12:00:07.81 |
+02:40:11.0 |
HIP 58472 |
16.50 |
| 2026-04-02 00:00 |
11:59:50.81 |
+02:41:28.4 |
HIP 58472 |
13.17 |
| 2026-04-02 12:00 |
11:59:33.89 |
+02:42:45.2 |
HIP 58472 |
10.69 |
| 2026-04-03 00:00 |
11:59:17.05 |
+02:44:01.3 |
HIP 58472 |
9.71 |
| 2026-04-03 12:00 |
11:59:00.29 |
+02:45:16.9 |
HIP 58472 |
10.61 |
| 2026-04-04 00:00 |
11:58:43.61 |
+02:46:31.7 |
HIP 58472 |
12.99 |
| 2026-04-04 12:00 |
11:58:27.02 |
+02:47:45.9 |
HIP 58472 |
16.20 |
| 2026-04-05 00:00 |
11:58:10.52 |
+02:48:59.5 |
HIP 58472 |
19.81 |
| 2026-04-05 12:00 |
11:57:54.11 |
+02:50:12.3 |
HIP 58472 |
23.64 |
| 2026-04-06 00:00 |
11:57:37.79 |
+02:51:24.5 |
HIP 58472 |
27.57 |
| 2026-04-06 12:00 |
11:57:21.57 |
+02:52:35.9 |
HIP 58267 |
28.46 |
| 2026-04-07 00:00 |
11:57:05.44 |
+02:53:46.6 |
HIP 58267 |
29.10 |
| 2026-04-07 12:00 |
11:56:49.42 |
+02:54:56.6 |
HIP 58267 |
30.29 |
| 2026-04-08 00:00 |
11:56:33.50 |
+02:56:05.9 |
HIP 58113 |
27.46 |
| 2026-04-08 12:00 |
11:56:17.68 |
+02:57:14.4 |
HIP 58113 |
23.71 |
| 2026-04-09 00:00 |
11:56:01.96 |
+02:58:22.1 |
HIP 58113 |
20.12 |
| 2026-04-09 12:00 |
11:55:46.36 |
+02:59:29.0 |
HIP 58113 |
16.78 |
| 2026-04-10 00:00 |
11:55:30.87 |
+03:00:35.2 |
HIP 58113 |
13.86 |
| 2026-04-10 12:00 |
11:55:15.48 |
+03:01:40.5 |
HIP 58083 |
10.70 |
| 2026-04-11 00:00 |
11:55:00.22 |
+03:02:45.1 |
HIP 58083 |
7.29 |
| 2026-04-11 12:00 |
11:54:45.07 |
+03:03:48.8 |
HIP 58083 |
4.82 |
| 2026-04-12 00:00 |
11:54:30.03 |
+03:04:51.7 |
HIP 58083 |
4.92 |
| 2026-04-12 12:00 |
11:54:15.12 |
+03:05:53.8 |
HIP 58083 |
7.43 |
| 2026-04-13 00:00 |
11:54:00.33 |
+03:06:55.0 |
HIP 58083 |
10.75 |
| 2026-04-13 12:00 |
11:53:45.66 |
+03:07:55.4 |
HIP 58083 |
14.29 |
| 2026-04-14 00:00 |
11:53:31.12 |
+03:08:54.9 |
HIP 57902 |
13.94 |
| 2026-04-14 12:00 |
11:53:16.70 |
+03:09:53.5 |
HIP 57902 |
10.37 |
| 2026-04-15 00:00 |
11:53:02.42 |
+03:10:51.2 |
HIP 57902 |
6.99 |
| 2026-04-15 12:00 |
11:52:48.27 |
+03:11:48.0 |
HIP 57902 |
4.20 |
| 2026-04-16 00:00 |
11:52:34.25 |
+03:12:43.9 |
HIP 57902 |
3.62 |