メタデータ
| 項目 |
値 |
| Designation |
C/1996 N1 (Brewington) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1996-08-03T10:10:19.309440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:50Z |
| Obs used |
303 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
16.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1996-08-09.0000000 |
| e |
1.00056420 |
| q (au) |
0.925821 |
| a (au) |
-1640.935799 |
| i (deg) |
52.147950 |
| Ω (om, deg) |
234.900362 |
| ω (w, deg) |
43.969685 |
| M (ma, deg) |
0.000083 |
等級
散乱 + 全体線形
$$
M_a = (8.902 + 5.315\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.902 |
| n |
5.315 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.800 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1996-07-05 |
1996-08-02 |
+5.1066 |
+1.494 |
| 1996-08-03 |
1996-09-01 |
-15.3196 |
-0.453 |
| 1996-09-01 |
1996-09-24 |
+16.0071 |
-1.174 |
| 1996-09-24 |
1996-11-09 |
+1.3962 |
+0.718 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
05:03:25.75 |
+00:12:44.3 |
HIP 23515 |
13.05 |
| 2026-09-20 12:00 |
05:03:25.36 |
+00:12:30.6 |
HIP 23515 |
12.81 |
| 2026-09-21 00:00 |
05:03:24.96 |
+00:12:16.9 |
HIP 23515 |
12.58 |
| 2026-09-21 12:00 |
05:03:24.55 |
+00:12:03.3 |
HIP 23515 |
12.35 |
| 2026-09-22 00:00 |
05:03:24.11 |
+00:11:49.6 |
HIP 23515 |
12.11 |
| 2026-09-22 12:00 |
05:03:23.65 |
+00:11:35.9 |
HIP 23515 |
11.88 |
| 2026-09-23 00:00 |
05:03:23.18 |
+00:11:22.2 |
HIP 23515 |
11.65 |
| 2026-09-23 12:00 |
05:03:22.68 |
+00:11:08.5 |
HIP 23515 |
11.41 |
| 2026-09-24 00:00 |
05:03:22.17 |
+00:10:54.8 |
HIP 23515 |
11.18 |
| 2026-09-24 12:00 |
05:03:21.64 |
+00:10:41.1 |
HIP 23515 |
10.96 |
| 2026-09-25 00:00 |
05:03:21.09 |
+00:10:27.4 |
HIP 23515 |
10.73 |
| 2026-09-25 12:00 |
05:03:20.53 |
+00:10:13.7 |
HIP 23515 |
10.50 |
| 2026-09-26 00:00 |
05:03:19.94 |
+00:10:00.0 |
HIP 23515 |
10.28 |
| 2026-09-26 12:00 |
05:03:19.34 |
+00:09:46.3 |
HIP 23515 |
10.06 |
| 2026-09-27 00:00 |
05:03:18.72 |
+00:09:32.6 |
HIP 23515 |
9.84 |
| 2026-09-27 12:00 |
05:03:18.08 |
+00:09:18.9 |
HIP 23515 |
9.63 |
| 2026-09-28 00:00 |
05:03:17.42 |
+00:09:05.2 |
HIP 23515 |
9.42 |
| 2026-09-28 12:00 |
05:03:16.74 |
+00:08:51.6 |
HIP 23515 |
9.21 |
| 2026-09-29 00:00 |
05:03:16.05 |
+00:08:37.9 |
HIP 23515 |
9.01 |
| 2026-09-29 12:00 |
05:03:15.34 |
+00:08:24.2 |
HIP 23515 |
8.82 |
| 2026-09-30 00:00 |
05:03:14.61 |
+00:08:10.6 |
HIP 23515 |
8.63 |
| 2026-09-30 12:00 |
05:03:13.86 |
+00:07:56.9 |
HIP 23515 |
8.45 |
| 2026-10-01 00:00 |
05:03:13.09 |
+00:07:43.3 |
HIP 23515 |
8.27 |
| 2026-10-01 12:00 |
05:03:12.31 |
+00:07:29.6 |
HIP 23515 |
8.11 |
| 2026-10-02 00:00 |
05:03:11.51 |
+00:07:16.0 |
HIP 23515 |
7.96 |
| 2026-10-02 12:00 |
05:03:10.69 |
+00:07:02.4 |
HIP 23515 |
7.81 |
| 2026-10-03 00:00 |
05:03:09.85 |
+00:06:48.8 |
HIP 23515 |
7.68 |
| 2026-10-03 12:00 |
05:03:08.99 |
+00:06:35.2 |
HIP 23515 |
7.56 |
| 2026-10-04 00:00 |
05:03:08.12 |
+00:06:21.7 |
HIP 23515 |
7.45 |
| 2026-10-04 12:00 |
05:03:07.23 |
+00:06:08.1 |
HIP 23515 |
7.36 |
| 2026-10-05 00:00 |
05:03:06.32 |
+00:05:54.6 |
HIP 23515 |
7.28 |
| 2026-10-05 12:00 |
05:03:05.39 |
+00:05:41.1 |
HIP 23515 |
7.21 |
| 2026-10-06 00:00 |
05:03:04.45 |
+00:05:27.6 |
HIP 23515 |
7.17 |
| 2026-10-06 12:00 |
05:03:03.49 |
+00:05:14.2 |
HIP 23515 |
7.14 |
| 2026-10-07 00:00 |
05:03:02.51 |
+00:05:00.7 |
HIP 23515 |
7.13 |
| 2026-10-07 12:00 |
05:03:01.51 |
+00:04:47.3 |
HIP 23515 |
7.14 |
| 2026-10-08 00:00 |
05:03:00.50 |
+00:04:33.9 |
HIP 23515 |
7.17 |
| 2026-10-08 12:00 |
05:02:59.47 |
+00:04:20.5 |
HIP 23515 |
7.22 |
| 2026-10-09 00:00 |
05:02:58.42 |
+00:04:07.2 |
HIP 23515 |
7.29 |
| 2026-10-09 12:00 |
05:02:57.35 |
+00:03:53.9 |
HIP 23515 |
7.37 |
| 2026-10-10 00:00 |
05:02:56.27 |
+00:03:40.6 |
HIP 23515 |
7.48 |
| 2026-10-10 12:00 |
05:02:55.17 |
+00:03:27.3 |
HIP 23515 |
7.60 |
| 2026-10-11 00:00 |
05:02:54.05 |
+00:03:14.1 |
HIP 23515 |
7.75 |