メタデータ
| 項目 |
値 |
| Designation |
252P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-03-15T06:19:30.322560Z |
| Orbit solution date (soln_date, UTC) |
2021-09-07T14:01:25Z |
| Obs used |
122 |
| NEO |
Yes |
| M1 |
16.400 |
| K1 |
16.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-06-13.0000000 |
| e |
0.67308502 |
| q (au) |
0.996046 |
| a (au) |
3.046804 |
| i (deg) |
10.422196 |
| Ω (om, deg) |
190.948496 |
| ω (w, deg) |
343.310475 |
| M (ma, deg) |
16.630534 |
等級
散乱 + 全体線形
$$
M_a = (12.317 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.317 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.500 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-25 00:00 |
10:03:38.86 |
+05:40:01.2 |
HIP 49342 |
23.43 |
| 2026-09-25 12:00 |
10:05:38.30 |
+05:30:41.3 |
HIP 49530 |
18.22 |
| 2026-09-26 00:00 |
10:07:37.99 |
+05:21:18.3 |
HIP 49530 |
19.87 |
| 2026-09-26 12:00 |
10:09:37.93 |
+05:11:52.2 |
HIP 49880 |
22.20 |
| 2026-09-27 00:00 |
10:11:38.11 |
+05:02:23.1 |
HIP 49880 |
15.03 |
| 2026-09-27 12:00 |
10:13:38.54 |
+04:52:50.9 |
HIP 50027 |
20.27 |
| 2026-09-28 00:00 |
10:15:39.21 |
+04:43:15.8 |
HIP 50193 |
28.83 |
| 2026-09-28 12:00 |
10:17:40.13 |
+04:33:37.9 |
HIP 50429 |
4.08 |
| 2026-09-29 00:00 |
10:19:41.29 |
+04:23:57.0 |
HIP 50656 |
21.25 |
| 2026-09-29 12:00 |
10:21:42.68 |
+04:14:13.4 |
HIP 50749 |
3.80 |
| 2026-09-30 00:00 |
10:23:44.32 |
+04:04:27.1 |
HIP 50865 |
26.68 |
| 2026-09-30 12:00 |
10:25:46.19 |
+03:54:38.1 |
HIP 51072 |
5.41 |
| 2026-10-01 00:00 |
10:27:48.30 |
+03:44:46.5 |
HIP 51190 |
8.61 |
| 2026-10-01 12:00 |
10:29:50.64 |
+03:34:52.3 |
HIP 51436 |
6.74 |
| 2026-10-02 00:00 |
10:31:53.21 |
+03:24:55.6 |
HIP 51436 |
25.43 |
| 2026-10-02 12:00 |
10:33:56.02 |
+03:14:56.5 |
HIP 51712 |
16.95 |
| 2026-10-03 00:00 |
10:35:59.05 |
+03:04:55.0 |
HIP 51882 |
20.08 |
| 2026-10-03 12:00 |
10:38:02.30 |
+02:54:51.2 |
HIP 52086 |
20.95 |
| 2026-10-04 00:00 |
10:40:05.78 |
+02:44:45.1 |
HIP 52201 |
14.67 |
| 2026-10-04 12:00 |
10:42:09.48 |
+02:34:36.9 |
HIP 52368 |
13.21 |
| 2026-10-05 00:00 |
10:44:13.40 |
+02:24:26.6 |
HIP 52584 |
14.82 |
| 2026-10-05 12:00 |
10:46:17.54 |
+02:14:14.3 |
HIP 52584 |
22.70 |
| 2026-10-06 00:00 |
10:48:21.89 |
+02:04:00.0 |
HIP 52856 |
19.42 |
| 2026-10-06 12:00 |
10:50:26.46 |
+01:53:43.7 |
HIP 53185 |
35.69 |
| 2026-10-07 00:00 |
10:52:31.23 |
+01:43:25.7 |
HIP 53185 |
3.52 |
| 2026-10-07 12:00 |
10:54:36.21 |
+01:33:05.9 |
HIP 53185 |
30.18 |
| 2026-10-08 00:00 |
10:56:41.40 |
+01:22:44.5 |
HIP 53666 |
37.93 |
| 2026-10-08 12:00 |
10:58:46.79 |
+01:12:21.5 |
HIP 53745 |
17.01 |
| 2026-10-09 00:00 |
11:00:52.38 |
+01:01:56.9 |
HIP 53745 |
16.43 |
| 2026-10-09 12:00 |
11:02:58.17 |
+00:51:31.0 |
HIP 53994 |
23.47 |
| 2026-10-10 00:00 |
11:05:04.15 |
+00:41:03.6 |
HIP 54246 |
12.73 |
| 2026-10-10 12:00 |
11:07:10.32 |
+00:30:35.0 |
HIP 54246 |
20.53 |
| 2026-10-11 00:00 |
11:09:16.68 |
+00:20:05.2 |
HIP 54292 |
49.95 |
| 2026-10-11 12:00 |
11:11:23.23 |
+00:09:34.3 |
HIP 54766 |
23.40 |
| 2026-10-12 00:00 |
11:13:29.97 |
-00:00:57.6 |
HIP 54849 |
5.05 |
| 2026-10-12 12:00 |
11:15:36.88 |
-00:11:30.5 |
HIP 55023 |
6.98 |
| 2026-10-13 00:00 |
11:17:43.97 |
-00:22:04.2 |
HIP 55304 |
29.29 |
| 2026-10-13 12:00 |
11:19:51.24 |
-00:32:38.7 |
HIP 55438 |
20.13 |
| 2026-10-14 00:00 |
11:21:58.68 |
-00:43:13.9 |
HIP 55438 |
13.53 |
| 2026-10-14 12:00 |
11:24:06.30 |
-00:53:49.7 |
HIP 55800 |
30.30 |
| 2026-10-15 00:00 |
11:26:14.07 |
-01:04:26.1 |
HIP 55800 |
3.67 |
| 2026-10-15 12:00 |
11:28:22.02 |
-01:15:02.9 |
HIP 55960 |
21.68 |
| 2026-10-16 00:00 |
11:30:30.12 |
-01:25:40.0 |
HIP 56263 |
30.91 |