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) |
| 2026-05-12 00:00 |
04:57:12.19 |
+00:33:24.3 |
HIP 23105 |
17.35 |
| 2026-05-12 12:00 |
04:57:14.19 |
+00:33:31.8 |
HIP 23105 |
16.93 |
| 2026-05-13 00:00 |
04:57:16.21 |
+00:33:39.3 |
HIP 23105 |
16.51 |
| 2026-05-13 12:00 |
04:57:18.22 |
+00:33:46.7 |
HIP 23105 |
16.10 |
| 2026-05-14 00:00 |
04:57:20.25 |
+00:33:54.0 |
HIP 23105 |
15.69 |
| 2026-05-14 12:00 |
04:57:22.28 |
+00:34:01.2 |
HIP 23105 |
15.29 |
| 2026-05-15 00:00 |
04:57:24.32 |
+00:34:08.3 |
HIP 23105 |
14.88 |
| 2026-05-15 12:00 |
04:57:26.36 |
+00:34:15.4 |
HIP 23105 |
14.49 |
| 2026-05-16 00:00 |
04:57:28.42 |
+00:34:22.3 |
HIP 23105 |
14.10 |
| 2026-05-16 12:00 |
04:57:30.47 |
+00:34:29.2 |
HIP 23105 |
13.72 |
| 2026-05-17 00:00 |
04:57:32.54 |
+00:34:35.9 |
HIP 23105 |
13.35 |
| 2026-05-17 12:00 |
04:57:34.61 |
+00:34:42.6 |
HIP 23105 |
12.98 |
| 2026-05-18 00:00 |
04:57:36.68 |
+00:34:49.2 |
HIP 23105 |
12.63 |
| 2026-05-18 12:00 |
04:57:38.77 |
+00:34:55.7 |
HIP 23105 |
12.28 |
| 2026-05-19 00:00 |
04:57:40.85 |
+00:35:02.1 |
HIP 23105 |
11.95 |
| 2026-05-19 12:00 |
04:57:42.95 |
+00:35:08.4 |
HIP 23105 |
11.63 |
| 2026-05-20 00:00 |
04:57:45.04 |
+00:35:14.6 |
HIP 23105 |
11.32 |
| 2026-05-20 12:00 |
04:57:47.15 |
+00:35:20.8 |
HIP 23105 |
11.03 |
| 2026-05-21 00:00 |
04:57:49.25 |
+00:35:26.8 |
HIP 23105 |
10.76 |
| 2026-05-21 12:00 |
04:57:51.36 |
+00:35:32.7 |
HIP 23105 |
10.50 |
| 2026-05-22 00:00 |
04:57:53.48 |
+00:35:38.6 |
HIP 23105 |
10.27 |
| 2026-05-22 12:00 |
04:57:55.60 |
+00:35:44.3 |
HIP 23105 |
10.05 |
| 2026-05-23 00:00 |
04:57:57.73 |
+00:35:50.0 |
HIP 23105 |
9.86 |
| 2026-05-23 12:00 |
04:57:59.86 |
+00:35:55.5 |
HIP 23105 |
9.69 |
| 2026-05-24 00:00 |
04:58:01.99 |
+00:36:01.0 |
HIP 23105 |
9.55 |
| 2026-05-24 12:00 |
04:58:04.13 |
+00:36:06.4 |
HIP 23105 |
9.44 |
| 2026-05-25 00:00 |
04:58:06.27 |
+00:36:11.7 |
HIP 23105 |
9.35 |
| 2026-05-25 12:00 |
04:58:08.41 |
+00:36:16.8 |
HIP 23105 |
9.30 |
| 2026-05-26 00:00 |
04:58:10.56 |
+00:36:21.9 |
HIP 23105 |
9.27 |
| 2026-05-26 12:00 |
04:58:12.71 |
+00:36:26.9 |
HIP 23105 |
9.27 |
| 2026-05-27 00:00 |
04:58:14.87 |
+00:36:31.8 |
HIP 23105 |
9.31 |
| 2026-05-27 12:00 |
04:58:17.02 |
+00:36:36.6 |
HIP 23105 |
9.37 |
| 2026-05-28 00:00 |
04:58:19.18 |
+00:36:41.3 |
HIP 23105 |
9.46 |
| 2026-05-28 12:00 |
04:58:21.35 |
+00:36:45.9 |
HIP 23105 |
9.58 |
| 2026-05-29 00:00 |
04:58:23.51 |
+00:36:50.4 |
HIP 23105 |
9.73 |
| 2026-05-29 12:00 |
04:58:25.68 |
+00:36:54.8 |
HIP 23105 |
9.91 |
| 2026-05-30 00:00 |
04:58:27.85 |
+00:36:59.1 |
HIP 23105 |
10.11 |
| 2026-05-30 12:00 |
04:58:30.02 |
+00:37:03.3 |
HIP 23105 |
10.33 |
| 2026-05-31 00:00 |
04:58:32.20 |
+00:37:07.4 |
HIP 23105 |
10.58 |
| 2026-05-31 12:00 |
04:58:34.37 |
+00:37:11.4 |
HIP 23105 |
10.85 |
| 2026-06-01 00:00 |
04:58:36.55 |
+00:37:15.3 |
HIP 23105 |
11.14 |
| 2026-06-01 12:00 |
04:58:38.73 |
+00:37:19.1 |
HIP 23105 |
11.44 |
| 2026-06-02 00:00 |
04:58:40.91 |
+00:37:22.8 |
HIP 23105 |
11.76 |