メタデータ
| 項目 |
値 |
| Designation |
312P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-09-24T19:35:29.054400Z |
| Orbit solution date (soln_date, UTC) |
2025-04-09T13:44:31Z |
| Obs used |
161 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
7.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-08-05.0000000 |
| e |
0.43012991 |
| q (au) |
1.971316 |
| a (au) |
3.459237 |
| i (deg) |
19.791956 |
| Ω (om, deg) |
144.887861 |
| ω (w, deg) |
207.686469 |
| M (ma, deg) |
184.317953 |
等級
散乱 + 全体線形
$$
M_a = (14.152 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.152 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.890 |
| 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
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) |
| 2026-05-12 00:00 |
18:06:07.16 |
+01:45:06.7 |
HIP 88681 |
10.25 |
| 2026-05-12 12:00 |
18:05:59.15 |
+01:47:27.3 |
HIP 88681 |
12.96 |
| 2026-05-13 00:00 |
18:05:50.80 |
+01:49:46.5 |
HIP 88681 |
15.82 |
| 2026-05-13 12:00 |
18:05:42.12 |
+01:52:04.3 |
HIP 88522 |
16.47 |
| 2026-05-14 00:00 |
18:05:33.11 |
+01:54:20.5 |
HIP 88522 |
13.95 |
| 2026-05-14 12:00 |
18:05:23.77 |
+01:56:35.3 |
HIP 88522 |
11.69 |
| 2026-05-15 00:00 |
18:05:14.09 |
+01:58:48.5 |
HIP 88522 |
9.88 |
| 2026-05-15 12:00 |
18:05:04.09 |
+02:01:00.1 |
HIP 88522 |
8.89 |
| 2026-05-16 00:00 |
18:04:53.76 |
+02:03:10.1 |
HIP 88522 |
9.01 |
| 2026-05-16 12:00 |
18:04:43.10 |
+02:05:18.4 |
HIP 88522 |
10.27 |
| 2026-05-17 00:00 |
18:04:32.12 |
+02:07:25.0 |
HIP 88522 |
12.35 |
| 2026-05-17 12:00 |
18:04:20.81 |
+02:09:29.9 |
HIP 88522 |
14.94 |
| 2026-05-18 00:00 |
18:04:09.18 |
+02:11:33.0 |
HIP 88522 |
17.86 |
| 2026-05-18 12:00 |
18:03:57.23 |
+02:13:34.2 |
HIP 88445 |
18.95 |
| 2026-05-19 00:00 |
18:03:44.95 |
+02:15:33.6 |
HIP 88445 |
16.01 |
| 2026-05-19 12:00 |
18:03:32.37 |
+02:17:31.1 |
HIP 88445 |
13.44 |
| 2026-05-20 00:00 |
18:03:19.46 |
+02:19:26.7 |
HIP 88445 |
11.56 |
| 2026-05-20 12:00 |
18:03:06.25 |
+02:21:20.3 |
HIP 88445 |
10.78 |
| 2026-05-21 00:00 |
18:02:52.72 |
+02:23:11.9 |
HIP 88445 |
11.38 |
| 2026-05-21 12:00 |
18:02:38.89 |
+02:25:01.5 |
HIP 88445 |
13.22 |
| 2026-05-22 00:00 |
18:02:24.75 |
+02:26:49.0 |
HIP 88445 |
15.91 |
| 2026-05-22 12:00 |
18:02:10.30 |
+02:28:34.3 |
HIP 88445 |
19.13 |
| 2026-05-23 00:00 |
18:01:55.56 |
+02:30:17.6 |
HIP 88445 |
22.68 |
| 2026-05-23 12:00 |
18:01:40.51 |
+02:31:58.6 |
HIP 88445 |
26.46 |
| 2026-05-24 00:00 |
18:01:25.17 |
+02:33:37.5 |
HIP 88192 |
25.11 |
| 2026-05-24 12:00 |
18:01:09.54 |
+02:35:14.1 |
HIP 88192 |
22.05 |
| 2026-05-25 00:00 |
18:00:53.61 |
+02:36:48.4 |
HIP 88192 |
19.45 |
| 2026-05-25 12:00 |
18:00:37.40 |
+02:38:20.4 |
HIP 88192 |
17.56 |
| 2026-05-26 00:00 |
18:00:20.90 |
+02:39:50.1 |
HIP 88192 |
16.67 |
| 2026-05-26 12:00 |
18:00:04.12 |
+02:41:17.4 |
HIP 88192 |
16.97 |
| 2026-05-27 00:00 |
17:59:47.06 |
+02:42:42.2 |
HIP 88192 |
18.45 |
| 2026-05-27 12:00 |
17:59:29.72 |
+02:44:04.6 |
HIP 88192 |
20.89 |
| 2026-05-28 00:00 |
17:59:12.11 |
+02:45:24.6 |
HIP 87954 |
17.35 |
| 2026-05-28 12:00 |
17:58:54.22 |
+02:46:42.0 |
HIP 87954 |
13.22 |
| 2026-05-29 00:00 |
17:58:36.07 |
+02:47:56.9 |
HIP 87954 |
9.49 |
| 2026-05-29 12:00 |
17:58:17.66 |
+02:49:09.2 |
HIP 87954 |
6.97 |
| 2026-05-30 00:00 |
17:57:58.98 |
+02:50:18.9 |
HIP 87932 |
4.16 |
| 2026-05-30 12:00 |
17:57:40.05 |
+02:51:26.0 |
HIP 87932 |
1.96 |
| 2026-05-31 00:00 |
17:57:20.86 |
+02:52:30.3 |
HIP 87932 |
6.20 |
| 2026-05-31 12:00 |
17:57:01.42 |
+02:53:32.0 |
HIP 87932 |
11.07 |
| 2026-06-01 00:00 |
17:56:41.73 |
+02:54:30.9 |
HIP 87811 |
7.78 |
| 2026-06-01 12:00 |
17:56:21.80 |
+02:55:27.1 |
HIP 87811 |
3.91 |
| 2026-06-02 00:00 |
17:56:01.63 |
+02:56:20.4 |
HIP 87811 |
4.70 |