C/2001 W2 (BATTERS)
メタデータ
| 項目 |
値 |
| Designation |
C/2001 W2 (BATTERS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-12-23T22:02:21.914880Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:11Z |
| Obs used |
350 |
| NEO |
Yes |
| M1 |
12.100 |
| K1 |
10.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2001-12-05.0000000 |
| e |
0.94137478 |
| q (au) |
1.051065 |
| a (au) |
17.928550 |
| i (deg) |
115.913079 |
| Ω (om, deg) |
113.355852 |
| ω (w, deg) |
142.085792 |
| M (ma, deg) |
359.754377 |
等級
散乱 + 全体線形
$$
M_a = (12.657 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.657 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2001-11-15 |
2001-12-22 |
+17.6512 |
-1.203 |
| 2001-12-24 |
2002-06-07 |
-7.8401 |
+3.188 |
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) |
| 2026-02-03 00:00 |
08:27:13.47 |
-22:09:06.8 |
HIP 41280 |
26.68 |
| 2026-02-03 12:00 |
08:27:09.40 |
-22:08:47.8 |
HIP 41280 |
25.73 |
| 2026-02-04 00:00 |
08:27:05.34 |
-22:08:28.5 |
HIP 41280 |
24.78 |
| 2026-02-04 12:00 |
08:27:01.28 |
-22:08:09.0 |
HIP 41280 |
23.85 |
| 2026-02-05 00:00 |
08:26:57.23 |
-22:07:49.0 |
HIP 41280 |
22.92 |
| 2026-02-05 12:00 |
08:26:53.18 |
-22:07:28.8 |
HIP 41280 |
21.99 |
| 2026-02-06 00:00 |
08:26:49.15 |
-22:07:08.3 |
HIP 41280 |
21.08 |
| 2026-02-06 12:00 |
08:26:45.12 |
-22:06:47.4 |
HIP 41280 |
20.17 |
| 2026-02-07 00:00 |
08:26:41.10 |
-22:06:26.3 |
HIP 41280 |
19.28 |
| 2026-02-07 12:00 |
08:26:37.09 |
-22:06:04.8 |
HIP 41280 |
18.39 |
| 2026-02-08 00:00 |
08:26:33.08 |
-22:05:43.0 |
HIP 41280 |
17.53 |
| 2026-02-08 12:00 |
08:26:29.09 |
-22:05:20.9 |
HIP 41280 |
16.68 |
| 2026-02-09 00:00 |
08:26:25.11 |
-22:04:58.5 |
HIP 41280 |
15.85 |
| 2026-02-09 12:00 |
08:26:21.13 |
-22:04:35.8 |
HIP 41280 |
15.05 |
| 2026-02-10 00:00 |
08:26:17.17 |
-22:04:12.8 |
HIP 41280 |
14.27 |
| 2026-02-10 12:00 |
08:26:13.22 |
-22:03:49.5 |
HIP 41280 |
13.52 |
| 2026-02-11 00:00 |
08:26:09.28 |
-22:03:25.9 |
HIP 41280 |
12.82 |
| 2026-02-11 12:00 |
08:26:05.35 |
-22:03:02.0 |
HIP 41280 |
12.16 |
| 2026-02-12 00:00 |
08:26:01.43 |
-22:02:37.8 |
HIP 41280 |
11.55 |
| 2026-02-12 12:00 |
08:25:57.52 |
-22:02:13.3 |
HIP 41280 |
11.00 |
| 2026-02-13 00:00 |
08:25:53.63 |
-22:01:48.5 |
HIP 41280 |
10.52 |
| 2026-02-13 12:00 |
08:25:49.75 |
-22:01:23.5 |
HIP 41280 |
10.12 |
| 2026-02-14 00:00 |
08:25:45.88 |
-22:00:58.1 |
HIP 41280 |
9.81 |
| 2026-02-14 12:00 |
08:25:42.02 |
-22:00:32.5 |
HIP 41280 |
9.61 |
| 2026-02-15 00:00 |
08:25:38.18 |
-22:00:06.6 |
HIP 41280 |
9.50 |
| 2026-02-15 12:00 |
08:25:34.35 |
-21:59:40.4 |
HIP 41280 |
9.50 |
| 2026-02-16 00:00 |
08:25:30.54 |
-21:59:13.9 |
HIP 41280 |
9.62 |
| 2026-02-16 12:00 |
08:25:26.74 |
-21:58:47.1 |
HIP 41280 |
9.83 |
| 2026-02-17 00:00 |
08:25:22.96 |
-21:58:20.1 |
HIP 41280 |
10.14 |
| 2026-02-17 12:00 |
08:25:19.19 |
-21:57:52.8 |
HIP 41280 |
10.54 |
| 2026-02-18 00:00 |
08:25:15.44 |
-21:57:25.2 |
HIP 41280 |
11.02 |
| 2026-02-18 12:00 |
08:25:11.70 |
-21:56:57.4 |
HIP 41280 |
11.57 |
| 2026-02-19 00:00 |
08:25:07.98 |
-21:56:29.3 |
HIP 41280 |
12.17 |
| 2026-02-19 12:00 |
08:25:04.27 |
-21:56:00.9 |
HIP 41280 |
12.82 |
| 2026-02-20 00:00 |
08:25:00.59 |
-21:55:32.3 |
HIP 41280 |
13.52 |
| 2026-02-20 12:00 |
08:24:56.92 |
-21:55:03.4 |
HIP 41280 |
14.25 |
| 2026-02-21 00:00 |
08:24:53.26 |
-21:54:34.3 |
HIP 41280 |
15.02 |
| 2026-02-21 12:00 |
08:24:49.63 |
-21:54:04.9 |
HIP 41280 |
15.80 |
| 2026-02-22 00:00 |
08:24:46.01 |
-21:53:35.2 |
HIP 41280 |
16.61 |
| 2026-02-22 12:00 |
08:24:42.41 |
-21:53:05.3 |
HIP 41280 |
17.44 |
| 2026-02-23 00:00 |
08:24:38.83 |
-21:52:35.2 |
HIP 41280 |
18.29 |
| 2026-02-23 12:00 |
08:24:35.27 |
-21:52:04.9 |
HIP 41280 |
19.14 |
| 2026-02-24 00:00 |
08:24:31.73 |
-21:51:34.3 |
HIP 41280 |
20.01 |