メタデータ
| 項目 |
値 |
| Designation |
215P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-10-02T18:27:25.634880Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:41Z |
| Obs used |
1054 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
12.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-01-15.0000000 |
| e |
0.19537942 |
| q (au) |
3.497206 |
| a (au) |
4.346404 |
| i (deg) |
10.055609 |
| Ω (om, deg) |
61.305636 |
| ω (w, deg) |
255.302311 |
| M (ma, deg) |
212.424286 |
等級
散乱 + 全体線形
$$
M_a = (11.686 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.686 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.793 |
| k |
0.800 |
| 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 |
13:05:58.31 |
-01:47:53.1 |
HIP 64000 |
15.24 |
| 2026-07-29 12:00 |
13:06:14.70 |
-01:50:33.3 |
HIP 64000 |
10.42 |
| 2026-07-30 00:00 |
13:06:31.22 |
-01:53:14.0 |
HIP 64000 |
5.70 |
| 2026-07-30 12:00 |
13:06:47.88 |
-01:55:55.4 |
HIP 64000 |
2.19 |
| 2026-07-31 00:00 |
13:07:04.67 |
-01:58:37.3 |
HIP 64000 |
5.14 |
| 2026-07-31 12:00 |
13:07:21.60 |
-02:01:19.8 |
HIP 64000 |
9.92 |
| 2026-08-01 00:00 |
13:07:38.66 |
-02:04:02.8 |
HIP 64000 |
14.89 |
| 2026-08-01 12:00 |
13:07:55.85 |
-02:06:46.4 |
HIP 64000 |
19.94 |
| 2026-08-02 00:00 |
13:08:13.18 |
-02:09:30.5 |
HIP 64000 |
25.03 |
| 2026-08-02 12:00 |
13:08:30.63 |
-02:12:15.2 |
HIP 64120 |
28.49 |
| 2026-08-03 00:00 |
13:08:48.22 |
-02:15:00.4 |
HIP 64120 |
26.14 |
| 2026-08-03 12:00 |
13:09:05.94 |
-02:17:46.1 |
HIP 64120 |
24.67 |
| 2026-08-04 00:00 |
13:09:23.78 |
-02:20:32.4 |
HIP 64120 |
24.27 |
| 2026-08-04 12:00 |
13:09:41.76 |
-02:23:19.2 |
HIP 64120 |
25.01 |
| 2026-08-05 00:00 |
13:09:59.86 |
-02:26:06.5 |
HIP 64318 |
22.81 |
| 2026-08-05 12:00 |
13:10:18.09 |
-02:28:54.3 |
HIP 64318 |
17.84 |
| 2026-08-06 00:00 |
13:10:36.45 |
-02:31:42.6 |
HIP 64318 |
13.16 |
| 2026-08-06 12:00 |
13:10:54.94 |
-02:34:31.4 |
HIP 64318 |
9.24 |
| 2026-08-07 00:00 |
13:11:13.54 |
-02:37:20.7 |
HIP 64318 |
7.51 |
| 2026-08-07 12:00 |
13:11:32.28 |
-02:40:10.5 |
HIP 64318 |
9.32 |
| 2026-08-08 00:00 |
13:11:51.14 |
-02:43:00.8 |
HIP 64318 |
13.34 |
| 2026-08-08 12:00 |
13:12:10.12 |
-02:45:51.5 |
HIP 64318 |
18.19 |
| 2026-08-09 00:00 |
13:12:29.23 |
-02:48:42.8 |
HIP 64498 |
18.98 |
| 2026-08-09 12:00 |
13:12:48.45 |
-02:51:34.5 |
HIP 64569 |
19.23 |
| 2026-08-10 00:00 |
13:13:07.80 |
-02:54:26.7 |
HIP 64569 |
15.36 |
| 2026-08-10 12:00 |
13:13:27.27 |
-02:57:19.3 |
HIP 64569 |
12.85 |
| 2026-08-11 00:00 |
13:13:46.86 |
-03:00:12.4 |
HIP 64569 |
12.57 |
| 2026-08-11 12:00 |
13:14:06.58 |
-03:03:05.9 |
HIP 64569 |
14.69 |
| 2026-08-12 00:00 |
13:14:26.40 |
-03:05:59.9 |
HIP 64569 |
18.42 |
| 2026-08-12 12:00 |
13:14:46.35 |
-03:08:54.3 |
HIP 64721 |
17.90 |
| 2026-08-13 00:00 |
13:15:06.42 |
-03:11:49.1 |
HIP 64721 |
13.73 |
| 2026-08-13 12:00 |
13:15:26.60 |
-03:14:44.4 |
HIP 64721 |
11.11 |
| 2026-08-14 00:00 |
13:15:46.89 |
-03:17:40.1 |
HIP 64721 |
11.23 |
| 2026-08-14 12:00 |
13:16:07.30 |
-03:20:36.1 |
HIP 64721 |
14.06 |
| 2026-08-15 00:00 |
13:16:27.83 |
-03:23:32.6 |
HIP 64721 |
18.41 |
| 2026-08-15 12:00 |
13:16:48.47 |
-03:26:29.5 |
HIP 64721 |
23.47 |
| 2026-08-16 00:00 |
13:17:09.22 |
-03:29:26.8 |
HIP 64721 |
28.89 |
| 2026-08-16 12:00 |
13:17:30.08 |
-03:32:24.4 |
HIP 64731 |
30.89 |
| 2026-08-17 00:00 |
13:17:51.05 |
-03:35:22.5 |
HIP 64731 |
32.98 |
| 2026-08-17 12:00 |
13:18:12.14 |
-03:38:20.9 |
HIP 64965 |
35.87 |
| 2026-08-18 00:00 |
13:18:33.33 |
-03:41:19.6 |
HIP 64965 |
37.52 |
| 2026-08-18 12:00 |
13:18:54.63 |
-03:44:18.8 |
HIP 64965 |
40.04 |
| 2026-08-19 00:00 |
13:19:16.04 |
-03:47:18.3 |
HIP 64965 |
43.28 |