メタデータ
| 項目 |
値 |
| Designation |
244P/Scotti |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-01-20T23:08:24.253440Z |
| Orbit solution date (soln_date, UTC) |
2024-06-06T23:12:46Z |
| Obs used |
1834 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
14.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-02-26.0000000 |
| e |
0.19863567 |
| q (au) |
3.920521 |
| a (au) |
4.892308 |
| i (deg) |
2.259254 |
| Ω (om, deg) |
354.132300 |
| ω (w, deg) |
92.754137 |
| M (ma, deg) |
69.863291 |
等級
散乱 + 全体線形
$$
M_a = (5.865 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.865 |
| 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 |
| 2020-08-18 |
2024-05-27 |
+26.0623 |
-16.089 |
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 |
14:12:16.79 |
-15:14:50.4 |
HIP 69312 |
15.39 |
| 2026-07-29 12:00 |
14:12:25.38 |
-15:15:27.5 |
HIP 69312 |
17.53 |
| 2026-07-30 00:00 |
14:12:34.13 |
-15:16:05.4 |
HIP 69312 |
19.72 |
| 2026-07-30 12:00 |
14:12:43.02 |
-15:16:44.1 |
HIP 69455 |
21.94 |
| 2026-07-31 00:00 |
14:12:52.05 |
-15:17:23.5 |
HIP 69455 |
20.69 |
| 2026-07-31 12:00 |
14:13:01.24 |
-15:18:03.7 |
HIP 69455 |
19.61 |
| 2026-08-01 00:00 |
14:13:10.57 |
-15:18:44.6 |
HIP 69562 |
17.29 |
| 2026-08-01 12:00 |
14:13:20.05 |
-15:19:26.2 |
HIP 69562 |
14.93 |
| 2026-08-02 00:00 |
14:13:29.67 |
-15:20:08.6 |
HIP 69562 |
12.55 |
| 2026-08-02 12:00 |
14:13:39.44 |
-15:20:51.7 |
HIP 69562 |
10.15 |
| 2026-08-03 00:00 |
14:13:49.35 |
-15:21:35.5 |
HIP 69562 |
7.75 |
| 2026-08-03 12:00 |
14:13:59.41 |
-15:22:20.0 |
HIP 69562 |
5.41 |
| 2026-08-04 00:00 |
14:14:09.61 |
-15:23:05.3 |
HIP 69562 |
3.36 |
| 2026-08-04 12:00 |
14:14:19.95 |
-15:23:51.3 |
HIP 69562 |
2.54 |
| 2026-08-05 00:00 |
14:14:30.43 |
-15:24:38.0 |
HIP 69562 |
3.94 |
| 2026-08-05 12:00 |
14:14:41.06 |
-15:25:25.4 |
HIP 69562 |
6.24 |
| 2026-08-06 00:00 |
14:14:51.82 |
-15:26:13.5 |
HIP 69562 |
8.80 |
| 2026-08-06 12:00 |
14:15:02.73 |
-15:27:02.4 |
HIP 69562 |
11.46 |
| 2026-08-07 00:00 |
14:15:13.77 |
-15:27:51.9 |
HIP 69562 |
14.19 |
| 2026-08-07 12:00 |
14:15:24.96 |
-15:28:42.1 |
HIP 69562 |
16.98 |
| 2026-08-08 00:00 |
14:15:36.28 |
-15:29:33.0 |
HIP 69562 |
19.81 |
| 2026-08-08 12:00 |
14:15:47.75 |
-15:30:24.6 |
HIP 69562 |
22.68 |
| 2026-08-09 00:00 |
14:15:59.35 |
-15:31:16.9 |
HIP 69681 |
24.83 |
| 2026-08-09 12:00 |
14:16:11.08 |
-15:32:09.8 |
HIP 69681 |
26.12 |
| 2026-08-10 00:00 |
14:16:22.96 |
-15:33:03.5 |
HIP 69681 |
27.70 |
| 2026-08-10 12:00 |
14:16:34.96 |
-15:33:57.8 |
HIP 69681 |
29.51 |
| 2026-08-11 00:00 |
14:16:47.11 |
-15:34:52.7 |
HIP 69861 |
30.56 |
| 2026-08-11 12:00 |
14:16:59.39 |
-15:35:48.4 |
HIP 69861 |
28.39 |
| 2026-08-12 00:00 |
14:17:11.80 |
-15:36:44.6 |
HIP 69861 |
26.38 |
| 2026-08-12 12:00 |
14:17:24.34 |
-15:37:41.6 |
HIP 69861 |
24.59 |
| 2026-08-13 00:00 |
14:17:37.02 |
-15:38:39.1 |
HIP 69861 |
23.08 |
| 2026-08-13 12:00 |
14:17:49.83 |
-15:39:37.4 |
HIP 69861 |
21.93 |
| 2026-08-14 00:00 |
14:18:02.77 |
-15:40:36.2 |
HIP 69861 |
21.20 |
| 2026-08-14 12:00 |
14:18:15.84 |
-15:41:35.7 |
HIP 69861 |
20.96 |
| 2026-08-15 00:00 |
14:18:29.04 |
-15:42:35.8 |
HIP 69861 |
21.24 |
| 2026-08-15 12:00 |
14:18:42.37 |
-15:43:36.6 |
HIP 69861 |
22.04 |
| 2026-08-16 00:00 |
14:18:55.83 |
-15:44:37.9 |
HIP 69861 |
23.31 |
| 2026-08-16 12:00 |
14:19:09.41 |
-15:45:39.9 |
HIP 69861 |
24.99 |
| 2026-08-17 00:00 |
14:19:23.12 |
-15:46:42.4 |
HIP 69861 |
27.03 |
| 2026-08-17 12:00 |
14:19:36.95 |
-15:47:45.6 |
HIP 69861 |
29.36 |
| 2026-08-18 00:00 |
14:19:50.91 |
-15:48:49.3 |
HIP 69861 |
31.92 |
| 2026-08-18 12:00 |
14:20:05.00 |
-15:49:53.7 |
HIP 70186 |
33.23 |
| 2026-08-19 00:00 |
14:20:19.21 |
-15:50:58.6 |
HIP 70186 |
30.25 |