メタデータ
| 項目 |
値 |
| Designation |
202P/Scotti |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-02-07T04:49:05.456640Z |
| Orbit solution date (soln_date, UTC) |
2025-03-06T13:42:30Z |
| Obs used |
449 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-11-13.0000000 |
| e |
0.33043947 |
| q (au) |
2.526852 |
| a (au) |
3.773896 |
| i (deg) |
2.185340 |
| Ω (om, deg) |
194.588240 |
| ω (w, deg) |
255.594450 |
| M (ma, deg) |
299.207436 |
等級
散乱 + 全体線形
$$
M_a = (16.098 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.098 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.975 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
13:37:18.05 |
-08:56:03.3 |
HIP 66535 |
17.94 |
| 2026-03-26 12:00 |
13:37:01.91 |
-08:54:17.4 |
HIP 66535 |
22.26 |
| 2026-03-27 00:00 |
13:36:45.65 |
-08:52:30.9 |
HIP 66535 |
26.63 |
| 2026-03-27 12:00 |
13:36:29.28 |
-08:50:43.7 |
HIP 66266 |
26.15 |
| 2026-03-28 00:00 |
13:36:12.80 |
-08:48:55.9 |
HIP 66266 |
23.54 |
| 2026-03-28 12:00 |
13:35:56.21 |
-08:47:07.6 |
HIP 66266 |
21.53 |
| 2026-03-29 00:00 |
13:35:39.52 |
-08:45:18.6 |
HIP 66266 |
20.33 |
| 2026-03-29 12:00 |
13:35:22.73 |
-08:43:29.1 |
HIP 66266 |
20.08 |
| 2026-03-30 00:00 |
13:35:05.84 |
-08:41:39.1 |
HIP 66266 |
20.84 |
| 2026-03-30 12:00 |
13:34:48.86 |
-08:39:48.5 |
HIP 66252 |
19.35 |
| 2026-03-31 00:00 |
13:34:31.79 |
-08:37:57.5 |
HIP 66252 |
17.68 |
| 2026-03-31 12:00 |
13:34:14.63 |
-08:36:05.9 |
HIP 66137 |
15.32 |
| 2026-04-01 00:00 |
13:33:57.39 |
-08:34:13.9 |
HIP 66137 |
10.95 |
| 2026-04-01 12:00 |
13:33:40.06 |
-08:32:21.5 |
HIP 66137 |
6.94 |
| 2026-04-02 00:00 |
13:33:22.67 |
-08:30:28.6 |
HIP 66137 |
4.49 |
| 2026-04-02 12:00 |
13:33:05.20 |
-08:28:35.4 |
HIP 66115 |
2.51 |
| 2026-04-03 00:00 |
13:32:47.66 |
-08:26:41.7 |
HIP 66115 |
5.89 |
| 2026-04-03 12:00 |
13:32:30.05 |
-08:24:47.8 |
HIP 66115 |
10.40 |
| 2026-04-04 00:00 |
13:32:12.38 |
-08:22:53.4 |
HIP 66115 |
15.08 |
| 2026-04-04 12:00 |
13:31:54.65 |
-08:20:58.8 |
HIP 66115 |
19.81 |
| 2026-04-05 00:00 |
13:31:36.87 |
-08:19:03.8 |
HIP 65963 |
18.75 |
| 2026-04-05 12:00 |
13:31:19.03 |
-08:17:08.6 |
HIP 65963 |
16.89 |
| 2026-04-06 00:00 |
13:31:01.15 |
-08:15:13.2 |
HIP 65963 |
16.30 |
| 2026-04-06 12:00 |
13:30:43.22 |
-08:13:17.5 |
HIP 65963 |
17.12 |
| 2026-04-07 00:00 |
13:30:25.25 |
-08:11:21.6 |
HIP 65963 |
19.16 |
| 2026-04-07 12:00 |
13:30:07.25 |
-08:09:25.5 |
HIP 65928 |
21.08 |
| 2026-04-08 00:00 |
13:29:49.20 |
-08:07:29.2 |
HIP 65928 |
22.43 |
| 2026-04-08 12:00 |
13:29:31.13 |
-08:05:32.8 |
HIP 65928 |
24.69 |
| 2026-04-09 00:00 |
13:29:13.04 |
-08:03:36.3 |
HIP 65712 |
27.03 |
| 2026-04-09 12:00 |
13:28:54.92 |
-08:01:39.7 |
HIP 65712 |
23.35 |
| 2026-04-10 00:00 |
13:28:36.78 |
-07:59:43.0 |
HIP 65712 |
20.19 |
| 2026-04-10 12:00 |
13:28:18.62 |
-07:57:46.3 |
HIP 65712 |
17.84 |
| 2026-04-11 00:00 |
13:28:00.46 |
-07:55:49.5 |
HIP 65712 |
16.63 |
| 2026-04-11 12:00 |
13:27:42.28 |
-07:53:52.7 |
HIP 65712 |
16.82 |
| 2026-04-12 00:00 |
13:27:24.11 |
-07:51:56.0 |
HIP 65712 |
18.38 |
| 2026-04-12 12:00 |
13:27:05.93 |
-07:49:59.3 |
HIP 65712 |
20.99 |
| 2026-04-13 00:00 |
13:26:47.75 |
-07:48:02.6 |
HIP 65712 |
24.32 |
| 2026-04-13 12:00 |
13:26:29.59 |
-07:46:06.1 |
HIP 65491 |
20.27 |
| 2026-04-14 00:00 |
13:26:11.43 |
-07:44:09.6 |
HIP 65491 |
15.46 |
| 2026-04-14 12:00 |
13:25:53.29 |
-07:42:13.3 |
HIP 65491 |
10.74 |
| 2026-04-15 00:00 |
13:25:35.17 |
-07:40:17.2 |
HIP 65491 |
6.31 |
| 2026-04-15 12:00 |
13:25:17.07 |
-07:38:21.2 |
HIP 65491 |
3.45 |
| 2026-04-16 00:00 |
13:24:59.00 |
-07:36:25.4 |
HIP 65491 |
5.63 |