メタデータ
| 項目 |
値 |
| Designation |
C/1996 E1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-07-27T08:19:31.935360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:49Z |
| Obs used |
237 |
| NEO |
- |
| M1 |
12.500 |
| K1 |
8.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1996-05-17.0000000 |
| e |
1.00090859 |
| q (au) |
1.358954 |
| a (au) |
-1495.676752 |
| i (deg) |
114.475378 |
| Ω (om, deg) |
149.841392 |
| ω (w, deg) |
81.108042 |
| M (ma, deg) |
-0.001216 |
等級
散乱 + 全体線形
$$
M_a = (8.349 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.349 |
| n |
6.000 |
| gf |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
21:30:30.08 |
-73:23:33.6 |
HIP 105974 |
16.35 |
| 2026-05-12 12:00 |
21:30:29.98 |
-73:24:03.4 |
HIP 105974 |
16.70 |
| 2026-05-13 00:00 |
21:30:29.82 |
-73:24:33.2 |
HIP 105974 |
17.04 |
| 2026-05-13 12:00 |
21:30:29.59 |
-73:25:03.0 |
HIP 105974 |
17.39 |
| 2026-05-14 00:00 |
21:30:29.30 |
-73:25:32.9 |
HIP 105974 |
17.75 |
| 2026-05-14 12:00 |
21:30:28.94 |
-73:26:02.8 |
HIP 105974 |
18.11 |
| 2026-05-15 00:00 |
21:30:28.52 |
-73:26:32.8 |
HIP 105974 |
18.48 |
| 2026-05-15 12:00 |
21:30:28.04 |
-73:27:02.8 |
HIP 105974 |
18.84 |
| 2026-05-16 00:00 |
21:30:27.49 |
-73:27:32.8 |
HIP 105974 |
19.22 |
| 2026-05-16 12:00 |
21:30:26.88 |
-73:28:02.9 |
HIP 105974 |
19.59 |
| 2026-05-17 00:00 |
21:30:26.21 |
-73:28:33.0 |
HIP 105974 |
19.97 |
| 2026-05-17 12:00 |
21:30:25.47 |
-73:29:03.1 |
HIP 105974 |
20.35 |
| 2026-05-18 00:00 |
21:30:24.66 |
-73:29:33.2 |
HIP 105974 |
20.74 |
| 2026-05-18 12:00 |
21:30:23.79 |
-73:30:03.4 |
HIP 105974 |
21.13 |
| 2026-05-19 00:00 |
21:30:22.86 |
-73:30:33.5 |
HIP 105974 |
21.52 |
| 2026-05-19 12:00 |
21:30:21.86 |
-73:31:03.7 |
HIP 105974 |
21.91 |
| 2026-05-20 00:00 |
21:30:20.80 |
-73:31:33.9 |
HIP 105974 |
22.31 |
| 2026-05-20 12:00 |
21:30:19.68 |
-73:32:04.2 |
HIP 105974 |
22.71 |
| 2026-05-21 00:00 |
21:30:18.49 |
-73:32:34.4 |
HIP 106360 |
22.94 |
| 2026-05-21 12:00 |
21:30:17.23 |
-73:33:04.6 |
HIP 106360 |
22.52 |
| 2026-05-22 00:00 |
21:30:15.91 |
-73:33:34.9 |
HIP 106360 |
22.10 |
| 2026-05-22 12:00 |
21:30:14.53 |
-73:34:05.1 |
HIP 106360 |
21.68 |
| 2026-05-23 00:00 |
21:30:13.09 |
-73:34:35.3 |
HIP 106360 |
21.28 |
| 2026-05-23 12:00 |
21:30:11.57 |
-73:35:05.6 |
HIP 106360 |
20.88 |
| 2026-05-24 00:00 |
21:30:10.00 |
-73:35:35.8 |
HIP 106360 |
20.48 |
| 2026-05-24 12:00 |
21:30:08.36 |
-73:36:06.1 |
HIP 106360 |
20.10 |
| 2026-05-25 00:00 |
21:30:06.66 |
-73:36:36.3 |
HIP 106360 |
19.72 |
| 2026-05-25 12:00 |
21:30:04.89 |
-73:37:06.5 |
HIP 106360 |
19.35 |
| 2026-05-26 00:00 |
21:30:03.06 |
-73:37:36.7 |
HIP 106360 |
18.99 |
| 2026-05-26 12:00 |
21:30:01.17 |
-73:38:06.9 |
HIP 106360 |
18.64 |
| 2026-05-27 00:00 |
21:29:59.21 |
-73:38:37.0 |
HIP 106360 |
18.31 |
| 2026-05-27 12:00 |
21:29:57.19 |
-73:39:07.2 |
HIP 106360 |
17.98 |
| 2026-05-28 00:00 |
21:29:55.11 |
-73:39:37.3 |
HIP 106360 |
17.67 |
| 2026-05-28 12:00 |
21:29:52.96 |
-73:40:07.4 |
HIP 106360 |
17.37 |
| 2026-05-29 00:00 |
21:29:50.75 |
-73:40:37.5 |
HIP 106360 |
17.08 |
| 2026-05-29 12:00 |
21:29:48.47 |
-73:41:07.5 |
HIP 106360 |
16.81 |
| 2026-05-30 00:00 |
21:29:46.14 |
-73:41:37.5 |
HIP 106360 |
16.55 |
| 2026-05-30 12:00 |
21:29:43.74 |
-73:42:07.5 |
HIP 106360 |
16.31 |
| 2026-05-31 00:00 |
21:29:41.27 |
-73:42:37.5 |
HIP 106360 |
16.09 |
| 2026-05-31 12:00 |
21:29:38.75 |
-73:43:07.4 |
HIP 106360 |
15.88 |
| 2026-06-01 00:00 |
21:29:36.16 |
-73:43:37.3 |
HIP 106360 |
15.70 |
| 2026-06-01 12:00 |
21:29:33.51 |
-73:44:07.1 |
HIP 106360 |
15.53 |
| 2026-06-02 00:00 |
21:29:30.79 |
-73:44:36.9 |
HIP 106360 |
15.38 |