C/2013 US10 (Catalina)
メタデータ
| 項目 |
値 |
| Designation |
C/2013 US10 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-11-15T17:19:09.816960Z |
| Orbit solution date (soln_date, UTC) |
2024-12-12T17:11:30Z |
| Obs used |
4396 |
| NEO |
- |
| M1 |
8.500 |
| K1 |
6.250 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-11-23.0000000 |
| e |
1.00028015 |
| q (au) |
0.822969 |
| a (au) |
-2937.555193 |
| i (deg) |
148.878297 |
| Ω (om, deg) |
186.144580 |
| ω (w, deg) |
340.358755 |
| M (ma, deg) |
0.000045 |
等級
散乱 + 全体線形
$$
M_a = (5.881 + 3.463\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.881 |
| n |
3.463 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 2013-11-16 |
2014-09-02 |
+6.3535 |
-5.170 |
| 2014-09-02 |
2015-05-09 |
-1.8424 |
+1.073 |
| 2015-05-09 |
2015-07-22 |
+1.9702 |
-0.858 |
| 2015-07-22 |
2015-09-04 |
+7.2052 |
-2.688 |
| 2015-09-04 |
2015-10-16 |
-7.7652 |
+0.126 |
| 2015-11-22 |
2016-04-28 |
+0.5265 |
+0.141 |
| 2016-04-28 |
2016-08-20 |
+4.8620 |
-1.810 |
| 2016-08-20 |
2017-01-04 |
-0.1909 |
+1.072 |
| 2017-01-04 |
2017-10-24 |
-1.1431 |
+1.466 |
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 |
02:00:53.66 |
+33:06:38.1 |
HIP 9269 |
23.22 |
| 2026-02-03 12:00 |
02:00:54.53 |
+33:06:15.9 |
HIP 9269 |
23.50 |
| 2026-02-04 00:00 |
02:00:55.45 |
+33:05:54.0 |
HIP 9269 |
23.78 |
| 2026-02-04 12:00 |
02:00:56.42 |
+33:05:32.3 |
HIP 9269 |
24.08 |
| 2026-02-05 00:00 |
02:00:57.42 |
+33:05:10.8 |
HIP 9269 |
24.39 |
| 2026-02-05 12:00 |
02:00:58.47 |
+33:04:49.6 |
HIP 9269 |
24.71 |
| 2026-02-06 00:00 |
02:00:59.56 |
+33:04:28.7 |
HIP 9269 |
25.04 |
| 2026-02-06 12:00 |
02:01:00.70 |
+33:04:08.0 |
HIP 9269 |
25.38 |
| 2026-02-07 00:00 |
02:01:01.88 |
+33:03:47.6 |
HIP 9501 |
25.58 |
| 2026-02-07 12:00 |
02:01:03.10 |
+33:03:27.4 |
HIP 9501 |
25.70 |
| 2026-02-08 00:00 |
02:01:04.36 |
+33:03:07.5 |
HIP 9501 |
25.83 |
| 2026-02-08 12:00 |
02:01:05.66 |
+33:02:47.9 |
HIP 9501 |
25.95 |
| 2026-02-09 00:00 |
02:01:07.01 |
+33:02:28.5 |
HIP 9501 |
26.07 |
| 2026-02-09 12:00 |
02:01:08.40 |
+33:02:09.4 |
HIP 9501 |
26.19 |
| 2026-02-10 00:00 |
02:01:09.83 |
+33:01:50.6 |
HIP 9501 |
26.30 |
| 2026-02-10 12:00 |
02:01:11.30 |
+33:01:32.0 |
HIP 9501 |
26.42 |
| 2026-02-11 00:00 |
02:01:12.82 |
+33:01:13.7 |
HIP 9501 |
26.53 |
| 2026-02-11 12:00 |
02:01:14.37 |
+33:00:55.6 |
HIP 9501 |
26.65 |
| 2026-02-12 00:00 |
02:01:15.97 |
+33:00:37.9 |
HIP 9501 |
26.76 |
| 2026-02-12 12:00 |
02:01:17.60 |
+33:00:20.3 |
HIP 9570 |
26.84 |
| 2026-02-13 00:00 |
02:01:19.28 |
+33:00:03.1 |
HIP 9570 |
26.75 |
| 2026-02-13 12:00 |
02:01:21.00 |
+32:59:46.1 |
HIP 9570 |
26.66 |
| 2026-02-14 00:00 |
02:01:22.76 |
+32:59:29.4 |
HIP 9570 |
26.56 |
| 2026-02-14 12:00 |
02:01:24.56 |
+32:59:13.0 |
HIP 9570 |
26.46 |
| 2026-02-15 00:00 |
02:01:26.40 |
+32:58:56.9 |
HIP 9570 |
26.37 |
| 2026-02-15 12:00 |
02:01:28.27 |
+32:58:41.0 |
HIP 9570 |
26.27 |
| 2026-02-16 00:00 |
02:01:30.19 |
+32:58:25.4 |
HIP 9570 |
26.17 |
| 2026-02-16 12:00 |
02:01:32.15 |
+32:58:10.1 |
HIP 9570 |
26.06 |
| 2026-02-17 00:00 |
02:01:34.15 |
+32:57:55.0 |
HIP 9570 |
25.96 |
| 2026-02-17 12:00 |
02:01:36.18 |
+32:57:40.2 |
HIP 9570 |
25.86 |
| 2026-02-18 00:00 |
02:01:38.26 |
+32:57:25.7 |
HIP 9570 |
25.76 |
| 2026-02-18 12:00 |
02:01:40.37 |
+32:57:11.5 |
HIP 9570 |
25.66 |
| 2026-02-19 00:00 |
02:01:42.52 |
+32:56:57.6 |
HIP 9570 |
25.56 |
| 2026-02-19 12:00 |
02:01:44.71 |
+32:56:43.9 |
HIP 9570 |
25.46 |
| 2026-02-20 00:00 |
02:01:46.93 |
+32:56:30.5 |
HIP 9570 |
25.36 |
| 2026-02-20 12:00 |
02:01:49.20 |
+32:56:17.4 |
HIP 9570 |
25.27 |
| 2026-02-21 00:00 |
02:01:51.50 |
+32:56:04.5 |
HIP 9570 |
25.17 |
| 2026-02-21 12:00 |
02:01:53.84 |
+32:55:52.0 |
HIP 9570 |
25.08 |
| 2026-02-22 00:00 |
02:01:56.21 |
+32:55:39.7 |
HIP 9570 |
24.99 |
| 2026-02-22 12:00 |
02:01:58.62 |
+32:55:27.7 |
HIP 9570 |
24.91 |
| 2026-02-23 00:00 |
02:02:01.07 |
+32:55:16.0 |
HIP 9570 |
24.83 |
| 2026-02-23 12:00 |
02:02:03.55 |
+32:55:04.5 |
HIP 9570 |
24.75 |
| 2026-02-24 00:00 |
02:02:06.07 |
+32:54:53.3 |
HIP 9570 |
24.68 |