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) |
| 2026-07-29 00:00 |
17:15:46.62 |
-01:16:47.7 |
HIP 84436 |
0.83 |
| 2026-07-29 12:00 |
17:15:37.46 |
-01:21:40.0 |
HIP 84436 |
4.57 |
| 2026-07-30 00:00 |
17:15:28.67 |
-01:26:33.9 |
HIP 84436 |
9.93 |
| 2026-07-30 12:00 |
17:15:20.27 |
-01:31:29.4 |
HIP 84353 |
13.95 |
| 2026-07-31 00:00 |
17:15:12.25 |
-01:36:26.4 |
HIP 84353 |
17.10 |
| 2026-07-31 12:00 |
17:15:04.60 |
-01:41:24.8 |
HIP 84353 |
21.20 |
| 2026-08-01 00:00 |
17:14:57.35 |
-01:46:24.7 |
HIP 84353 |
25.79 |
| 2026-08-01 12:00 |
17:14:50.48 |
-01:51:26.0 |
HIP 84353 |
30.64 |
| 2026-08-02 00:00 |
17:14:44.00 |
-01:56:28.6 |
HIP 84374 |
33.90 |
| 2026-08-02 12:00 |
17:14:37.90 |
-02:01:32.6 |
HIP 84374 |
29.09 |
| 2026-08-03 00:00 |
17:14:32.20 |
-02:06:37.9 |
HIP 84374 |
24.43 |
| 2026-08-03 12:00 |
17:14:26.89 |
-02:11:44.5 |
HIP 84374 |
20.03 |
| 2026-08-04 00:00 |
17:14:21.97 |
-02:16:52.2 |
HIP 84374 |
16.09 |
| 2026-08-04 12:00 |
17:14:17.45 |
-02:22:01.2 |
HIP 84374 |
13.03 |
| 2026-08-05 00:00 |
17:14:13.32 |
-02:27:11.4 |
HIP 84374 |
11.58 |
| 2026-08-05 12:00 |
17:14:09.59 |
-02:32:22.6 |
HIP 84374 |
12.31 |
| 2026-08-06 00:00 |
17:14:06.26 |
-02:37:35.0 |
HIP 84374 |
14.91 |
| 2026-08-06 12:00 |
17:14:03.33 |
-02:42:48.4 |
HIP 84374 |
18.61 |
| 2026-08-07 00:00 |
17:14:00.80 |
-02:48:02.9 |
HIP 84374 |
22.88 |
| 2026-08-07 12:00 |
17:13:58.67 |
-02:53:18.4 |
HIP 84374 |
27.47 |
| 2026-08-08 00:00 |
17:13:56.95 |
-02:58:34.8 |
HIP 84374 |
32.24 |
| 2026-08-08 12:00 |
17:13:55.63 |
-03:03:52.1 |
HIP 84116 |
36.03 |
| 2026-08-09 00:00 |
17:13:54.71 |
-03:09:10.3 |
HIP 84116 |
33.63 |
| 2026-08-09 12:00 |
17:13:54.20 |
-03:14:29.4 |
HIP 84116 |
32.03 |
| 2026-08-10 00:00 |
17:13:54.10 |
-03:19:49.3 |
HIP 84116 |
31.38 |
| 2026-08-10 12:00 |
17:13:54.41 |
-03:25:10.0 |
HIP 84116 |
31.72 |
| 2026-08-11 00:00 |
17:13:55.12 |
-03:30:31.5 |
HIP 84116 |
33.04 |
| 2026-08-11 12:00 |
17:13:56.24 |
-03:35:53.7 |
HIP 84328 |
34.49 |
| 2026-08-12 00:00 |
17:13:57.78 |
-03:41:16.5 |
HIP 84328 |
29.14 |
| 2026-08-12 12:00 |
17:13:59.72 |
-03:46:40.0 |
HIP 84328 |
23.79 |
| 2026-08-13 00:00 |
17:14:02.07 |
-03:52:04.2 |
HIP 84328 |
18.42 |
| 2026-08-13 12:00 |
17:14:04.84 |
-03:57:28.9 |
HIP 84328 |
13.07 |
| 2026-08-14 00:00 |
17:14:08.01 |
-04:02:54.1 |
HIP 84328 |
7.80 |
| 2026-08-14 12:00 |
17:14:11.60 |
-04:08:19.9 |
HIP 84328 |
3.22 |
| 2026-08-15 00:00 |
17:14:15.60 |
-04:13:46.2 |
HIP 84328 |
4.48 |
| 2026-08-15 12:00 |
17:14:20.01 |
-04:19:12.9 |
HIP 84328 |
9.53 |
| 2026-08-16 00:00 |
17:14:24.83 |
-04:24:40.0 |
HIP 84328 |
14.95 |
| 2026-08-16 12:00 |
17:14:30.05 |
-04:30:07.6 |
HIP 84328 |
20.48 |
| 2026-08-17 00:00 |
17:14:35.69 |
-04:35:35.4 |
HIP 84328 |
26.06 |
| 2026-08-17 12:00 |
17:14:41.74 |
-04:41:03.6 |
HIP 84328 |
31.68 |
| 2026-08-18 00:00 |
17:14:48.20 |
-04:46:32.1 |
HIP 84212 |
35.86 |
| 2026-08-18 12:00 |
17:14:55.06 |
-04:52:00.8 |
HIP 84212 |
34.49 |
| 2026-08-19 00:00 |
17:15:02.33 |
-04:57:29.8 |
HIP 84212 |
34.14 |