メタデータ
| 項目 |
値 |
| Designation |
227P/Catalina-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-03-15T05:19:57.423360Z |
| Orbit solution date (soln_date, UTC) |
2025-01-10T09:12:26Z |
| Obs used |
1235 |
| NEO |
- |
| M1 |
12.100 |
| K1 |
18.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-03-27.0000000 |
| e |
0.51043355 |
| q (au) |
1.742453 |
| a (au) |
3.559175 |
| i (deg) |
6.512508 |
| Ω (om, deg) |
48.592710 |
| ω (w, deg) |
90.858601 |
| M (ma, deg) |
200.853061 |
等級
散乱 + 全体線形
$$
M_a = (11.892 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.892 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
| 2023-10-09 |
2023-12-06 |
+3.9053 |
+0.883 |
| 2023-12-06 |
2024-03-15 |
+40.6801 |
-8.847 |
| 2024-03-15 |
2024-07-23 |
-1.7736 |
-0.021 |
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) |
| 2026-07-29 00:00 |
20:41:31.59 |
-28:00:36.2 |
HIP 102108 |
0.99 |
| 2026-07-29 12:00 |
20:41:09.92 |
-28:01:51.7 |
HIP 102108 |
5.61 |
| 2026-07-30 00:00 |
20:40:48.25 |
-28:03:06.4 |
HIP 102108 |
10.52 |
| 2026-07-30 12:00 |
20:40:26.58 |
-28:04:20.2 |
HIP 102108 |
15.45 |
| 2026-07-31 00:00 |
20:40:04.90 |
-28:05:33.2 |
HIP 102108 |
20.37 |
| 2026-07-31 12:00 |
20:39:43.23 |
-28:06:45.3 |
HIP 101904 |
20.80 |
| 2026-08-01 00:00 |
20:39:21.57 |
-28:07:56.5 |
HIP 101904 |
18.07 |
| 2026-08-01 12:00 |
20:38:59.91 |
-28:09:06.8 |
HIP 101904 |
16.42 |
| 2026-08-02 00:00 |
20:38:38.28 |
-28:10:16.3 |
HIP 101904 |
16.17 |
| 2026-08-02 12:00 |
20:38:16.66 |
-28:11:24.8 |
HIP 101904 |
17.36 |
| 2026-08-03 00:00 |
20:37:55.06 |
-28:12:32.4 |
HIP 101904 |
19.74 |
| 2026-08-03 12:00 |
20:37:33.48 |
-28:13:39.1 |
HIP 101904 |
22.92 |
| 2026-08-04 00:00 |
20:37:11.93 |
-28:14:44.8 |
HIP 101904 |
26.63 |
| 2026-08-04 12:00 |
20:36:50.41 |
-28:15:49.6 |
HIP 101610 |
23.99 |
| 2026-08-05 00:00 |
20:36:28.93 |
-28:16:53.4 |
HIP 101610 |
21.77 |
| 2026-08-05 12:00 |
20:36:07.49 |
-28:17:56.3 |
HIP 101610 |
20.46 |
| 2026-08-06 00:00 |
20:35:46.09 |
-28:18:58.2 |
HIP 101610 |
20.25 |
| 2026-08-06 12:00 |
20:35:24.73 |
-28:19:59.1 |
HIP 101610 |
21.15 |
| 2026-08-07 00:00 |
20:35:03.42 |
-28:20:59.1 |
HIP 101610 |
23.02 |
| 2026-08-07 12:00 |
20:34:42.16 |
-28:21:58.0 |
HIP 101610 |
25.64 |
| 2026-08-08 00:00 |
20:34:20.96 |
-28:22:55.9 |
HIP 101367 |
25.16 |
| 2026-08-08 12:00 |
20:33:59.82 |
-28:23:52.8 |
HIP 101367 |
20.73 |
| 2026-08-09 00:00 |
20:33:38.74 |
-28:24:48.8 |
HIP 101367 |
16.50 |
| 2026-08-09 12:00 |
20:33:17.72 |
-28:25:43.6 |
HIP 101367 |
12.66 |
| 2026-08-10 00:00 |
20:32:56.78 |
-28:26:37.5 |
HIP 101367 |
9.63 |
| 2026-08-10 12:00 |
20:32:35.91 |
-28:27:30.3 |
HIP 101367 |
8.34 |
| 2026-08-11 00:00 |
20:32:15.12 |
-28:28:22.0 |
HIP 101340 |
7.88 |
| 2026-08-11 12:00 |
20:31:54.40 |
-28:29:12.8 |
HIP 101242 |
8.96 |
| 2026-08-12 00:00 |
20:31:33.77 |
-28:30:02.4 |
HIP 101242 |
5.75 |
| 2026-08-12 12:00 |
20:31:13.23 |
-28:30:51.0 |
HIP 101242 |
5.31 |
| 2026-08-13 00:00 |
20:30:52.78 |
-28:31:38.5 |
HIP 101242 |
8.06 |
| 2026-08-13 12:00 |
20:30:32.42 |
-28:32:25.0 |
HIP 101242 |
11.94 |
| 2026-08-14 00:00 |
20:30:12.16 |
-28:33:10.3 |
HIP 101242 |
16.15 |
| 2026-08-14 12:00 |
20:29:52.00 |
-28:33:54.6 |
HIP 101242 |
20.45 |
| 2026-08-15 00:00 |
20:29:31.95 |
-28:34:37.8 |
HIP 101242 |
24.80 |
| 2026-08-15 12:00 |
20:29:12.00 |
-28:35:20.0 |
HIP 100893 |
23.90 |
| 2026-08-16 00:00 |
20:28:52.16 |
-28:36:01.0 |
HIP 100893 |
19.87 |
| 2026-08-16 12:00 |
20:28:32.44 |
-28:36:40.9 |
HIP 100893 |
16.07 |
| 2026-08-17 00:00 |
20:28:12.83 |
-28:37:19.8 |
HIP 100893 |
12.66 |
| 2026-08-17 12:00 |
20:27:53.35 |
-28:37:57.5 |
HIP 100893 |
10.02 |
| 2026-08-18 00:00 |
20:27:33.98 |
-28:38:34.2 |
HIP 100893 |
8.80 |
| 2026-08-18 12:00 |
20:27:14.75 |
-28:39:09.8 |
HIP 100893 |
9.54 |
| 2026-08-19 00:00 |
20:26:55.64 |
-28:39:44.2 |
HIP 100897 |
11.62 |