C/2012 B3 (La Sagra)
メタデータ
| 項目 |
値 |
| Designation |
C/2012 B3 (La Sagra) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-12-06T20:01:59.358720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:00Z |
| Obs used |
295 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-04-01.0000000 |
| e |
1.00118336 |
| q (au) |
3.536536 |
| a (au) |
-2988.542542 |
| i (deg) |
106.932915 |
| Ω (om, deg) |
252.999494 |
| ω (w, deg) |
50.733261 |
| M (ma, deg) |
0.000701 |
等級
散乱 + 全体線形
$$
M_a = (16.433 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.433 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
9.991 |
| 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) |
| 2026-02-03 00:00 |
04:32:08.34 |
+11:39:45.6 |
HIP 21091 |
28.76 |
| 2026-02-03 12:00 |
04:32:06.50 |
+11:39:46.2 |
HIP 21091 |
28.55 |
| 2026-02-04 00:00 |
04:32:04.70 |
+11:39:46.9 |
HIP 21091 |
28.35 |
| 2026-02-04 12:00 |
04:32:02.92 |
+11:39:47.7 |
HIP 21091 |
28.16 |
| 2026-02-05 00:00 |
04:32:01.18 |
+11:39:48.6 |
HIP 21091 |
27.99 |
| 2026-02-05 12:00 |
04:31:59.47 |
+11:39:49.6 |
HIP 21091 |
27.82 |
| 2026-02-06 00:00 |
04:31:57.80 |
+11:39:50.8 |
HIP 21091 |
27.67 |
| 2026-02-06 12:00 |
04:31:56.16 |
+11:39:52.0 |
HIP 21091 |
27.52 |
| 2026-02-07 00:00 |
04:31:54.56 |
+11:39:53.4 |
HIP 21091 |
27.39 |
| 2026-02-07 12:00 |
04:31:52.99 |
+11:39:54.8 |
HIP 21091 |
27.26 |
| 2026-02-08 00:00 |
04:31:51.45 |
+11:39:56.4 |
HIP 21091 |
27.15 |
| 2026-02-08 12:00 |
04:31:49.95 |
+11:39:58.0 |
HIP 21091 |
27.04 |
| 2026-02-09 00:00 |
04:31:48.48 |
+11:39:59.8 |
HIP 21091 |
26.94 |
| 2026-02-09 12:00 |
04:31:47.05 |
+11:40:01.7 |
HIP 21091 |
26.85 |
| 2026-02-10 00:00 |
04:31:45.65 |
+11:40:03.7 |
HIP 21091 |
26.78 |
| 2026-02-10 12:00 |
04:31:44.29 |
+11:40:05.7 |
HIP 21091 |
26.70 |
| 2026-02-11 00:00 |
04:31:42.96 |
+11:40:07.9 |
HIP 21091 |
26.64 |
| 2026-02-11 12:00 |
04:31:41.67 |
+11:40:10.2 |
HIP 21091 |
26.59 |
| 2026-02-12 00:00 |
04:31:40.41 |
+11:40:12.6 |
HIP 21091 |
26.54 |
| 2026-02-12 12:00 |
04:31:39.18 |
+11:40:15.1 |
HIP 21091 |
26.50 |
| 2026-02-13 00:00 |
04:31:38.00 |
+11:40:17.7 |
HIP 21091 |
26.47 |
| 2026-02-13 12:00 |
04:31:36.84 |
+11:40:20.3 |
HIP 21091 |
26.44 |
| 2026-02-14 00:00 |
04:31:35.73 |
+11:40:23.1 |
HIP 21091 |
26.42 |
| 2026-02-14 12:00 |
04:31:34.64 |
+11:40:26.0 |
HIP 21091 |
26.41 |
| 2026-02-15 00:00 |
04:31:33.60 |
+11:40:29.0 |
HIP 21091 |
26.40 |
| 2026-02-15 12:00 |
04:31:32.58 |
+11:40:32.0 |
HIP 21091 |
26.40 |
| 2026-02-16 00:00 |
04:31:31.61 |
+11:40:35.2 |
HIP 21091 |
26.41 |
| 2026-02-16 12:00 |
04:31:30.67 |
+11:40:38.5 |
HIP 21091 |
26.42 |
| 2026-02-17 00:00 |
04:31:29.76 |
+11:40:41.8 |
HIP 21091 |
26.43 |
| 2026-02-17 12:00 |
04:31:28.89 |
+11:40:45.3 |
HIP 21091 |
26.46 |
| 2026-02-18 00:00 |
04:31:28.06 |
+11:40:48.8 |
HIP 21091 |
26.48 |
| 2026-02-18 12:00 |
04:31:27.26 |
+11:40:52.5 |
HIP 21091 |
26.51 |
| 2026-02-19 00:00 |
04:31:26.50 |
+11:40:56.2 |
HIP 21091 |
26.54 |
| 2026-02-19 12:00 |
04:31:25.77 |
+11:41:00.0 |
HIP 21091 |
26.58 |
| 2026-02-20 00:00 |
04:31:25.08 |
+11:41:03.9 |
HIP 21091 |
26.62 |
| 2026-02-20 12:00 |
04:31:24.42 |
+11:41:07.9 |
HIP 21091 |
26.67 |
| 2026-02-21 00:00 |
04:31:23.80 |
+11:41:12.0 |
HIP 21091 |
26.72 |
| 2026-02-21 12:00 |
04:31:23.22 |
+11:41:16.1 |
HIP 21091 |
26.77 |
| 2026-02-22 00:00 |
04:31:22.67 |
+11:41:20.4 |
HIP 21091 |
26.83 |
| 2026-02-22 12:00 |
04:31:22.16 |
+11:41:24.7 |
HIP 21091 |
26.89 |
| 2026-02-23 00:00 |
04:31:21.68 |
+11:41:29.1 |
HIP 21091 |
26.95 |
| 2026-02-23 12:00 |
04:31:21.24 |
+11:41:33.6 |
HIP 21091 |
27.01 |
| 2026-02-24 00:00 |
04:31:20.83 |
+11:41:38.2 |
HIP 21091 |
27.08 |