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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
08:21:02.50 |
-20:15:07.7 |
HIP 40944 |
11.28 |
| 2026-05-12 12:00 |
08:21:03.60 |
-20:14:34.6 |
HIP 40944 |
10.67 |
| 2026-05-13 00:00 |
08:21:04.74 |
-20:14:01.7 |
HIP 40944 |
10.06 |
| 2026-05-13 12:00 |
08:21:05.90 |
-20:13:28.9 |
HIP 40944 |
9.45 |
| 2026-05-14 00:00 |
08:21:07.10 |
-20:12:56.4 |
HIP 40944 |
8.84 |
| 2026-05-14 12:00 |
08:21:08.32 |
-20:12:24.0 |
HIP 40944 |
8.24 |
| 2026-05-15 00:00 |
08:21:09.58 |
-20:11:51.9 |
HIP 40944 |
7.63 |
| 2026-05-15 12:00 |
08:21:10.86 |
-20:11:19.9 |
HIP 40944 |
7.03 |
| 2026-05-16 00:00 |
08:21:12.18 |
-20:10:48.1 |
HIP 40944 |
6.42 |
| 2026-05-16 12:00 |
08:21:13.52 |
-20:10:16.6 |
HIP 40944 |
5.82 |
| 2026-05-17 00:00 |
08:21:14.89 |
-20:09:45.2 |
HIP 40944 |
5.23 |
| 2026-05-17 12:00 |
08:21:16.30 |
-20:09:14.1 |
HIP 40944 |
4.64 |
| 2026-05-18 00:00 |
08:21:17.73 |
-20:08:43.1 |
HIP 40944 |
4.06 |
| 2026-05-18 12:00 |
08:21:19.19 |
-20:08:12.4 |
HIP 40944 |
3.50 |
| 2026-05-19 00:00 |
08:21:20.68 |
-20:07:41.9 |
HIP 40944 |
2.96 |
| 2026-05-19 12:00 |
08:21:22.20 |
-20:07:11.6 |
HIP 40944 |
2.46 |
| 2026-05-20 00:00 |
08:21:23.74 |
-20:06:41.5 |
HIP 40944 |
2.04 |
| 2026-05-20 12:00 |
08:21:25.32 |
-20:06:11.6 |
HIP 40944 |
1.74 |
| 2026-05-21 00:00 |
08:21:26.92 |
-20:05:42.0 |
HIP 40944 |
1.65 |
| 2026-05-21 12:00 |
08:21:28.55 |
-20:05:12.6 |
HIP 40944 |
1.78 |
| 2026-05-22 00:00 |
08:21:30.21 |
-20:04:43.4 |
HIP 40944 |
2.11 |
| 2026-05-22 12:00 |
08:21:31.89 |
-20:04:14.4 |
HIP 40944 |
2.56 |
| 2026-05-23 00:00 |
08:21:33.61 |
-20:03:45.6 |
HIP 40944 |
3.07 |
| 2026-05-23 12:00 |
08:21:35.35 |
-20:03:17.1 |
HIP 40944 |
3.62 |
| 2026-05-24 00:00 |
08:21:37.12 |
-20:02:48.8 |
HIP 40944 |
4.20 |
| 2026-05-24 12:00 |
08:21:38.91 |
-20:02:20.7 |
HIP 40944 |
4.79 |
| 2026-05-25 00:00 |
08:21:40.73 |
-20:01:52.9 |
HIP 40944 |
5.40 |
| 2026-05-25 12:00 |
08:21:42.58 |
-20:01:25.3 |
HIP 40944 |
6.01 |
| 2026-05-26 00:00 |
08:21:44.46 |
-20:00:57.9 |
HIP 40944 |
6.64 |
| 2026-05-26 12:00 |
08:21:46.36 |
-20:00:30.7 |
HIP 40944 |
7.26 |
| 2026-05-27 00:00 |
08:21:48.28 |
-20:00:03.8 |
HIP 40944 |
7.89 |
| 2026-05-27 12:00 |
08:21:50.24 |
-19:59:37.2 |
HIP 40944 |
8.52 |
| 2026-05-28 00:00 |
08:21:52.21 |
-19:59:10.7 |
HIP 40944 |
9.16 |
| 2026-05-28 12:00 |
08:21:54.22 |
-19:58:44.6 |
HIP 40944 |
9.80 |
| 2026-05-29 00:00 |
08:21:56.25 |
-19:58:18.6 |
HIP 40944 |
10.44 |
| 2026-05-29 12:00 |
08:21:58.30 |
-19:57:52.9 |
HIP 40944 |
11.09 |
| 2026-05-30 00:00 |
08:22:00.38 |
-19:57:27.4 |
HIP 40944 |
11.73 |
| 2026-05-30 12:00 |
08:22:02.49 |
-19:57:02.2 |
HIP 40944 |
12.38 |
| 2026-05-31 00:00 |
08:22:04.62 |
-19:56:37.2 |
HIP 40944 |
13.03 |
| 2026-05-31 12:00 |
08:22:06.77 |
-19:56:12.5 |
HIP 40944 |
13.69 |
| 2026-06-01 00:00 |
08:22:08.95 |
-19:55:48.0 |
HIP 40944 |
14.34 |
| 2026-06-01 12:00 |
08:22:11.15 |
-19:55:23.8 |
HIP 40944 |
15.00 |
| 2026-06-02 00:00 |
08:22:13.38 |
-19:54:59.8 |
HIP 40944 |
15.65 |