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) |
| 2026-06-01 00:00 |
14:14:23.23 |
-15:37:20.8 |
HIP 69562 |
16.01 |
| 2026-06-01 12:00 |
14:14:12.66 |
-15:36:24.0 |
HIP 69455 |
14.48 |
| 2026-06-02 00:00 |
14:14:02.22 |
-15:35:27.8 |
HIP 69455 |
12.10 |
| 2026-06-02 12:00 |
14:13:51.93 |
-15:34:32.2 |
HIP 69455 |
9.90 |
| 2026-06-03 00:00 |
14:13:41.79 |
-15:33:37.2 |
HIP 69455 |
8.00 |
| 2026-06-03 12:00 |
14:13:31.79 |
-15:32:42.9 |
HIP 69455 |
6.62 |
| 2026-06-04 00:00 |
14:13:21.94 |
-15:31:49.1 |
HIP 69455 |
6.08 |
| 2026-06-04 12:00 |
14:13:12.24 |
-15:30:56.0 |
HIP 69455 |
6.54 |
| 2026-06-05 00:00 |
14:13:02.69 |
-15:30:03.5 |
HIP 69455 |
7.80 |
| 2026-06-05 12:00 |
14:12:53.28 |
-15:29:11.7 |
HIP 69455 |
9.51 |
| 2026-06-06 00:00 |
14:12:44.03 |
-15:28:20.5 |
HIP 69455 |
11.45 |
| 2026-06-06 12:00 |
14:12:34.93 |
-15:27:30.0 |
HIP 69455 |
13.50 |
| 2026-06-07 00:00 |
14:12:25.99 |
-15:26:40.2 |
HIP 69455 |
15.60 |
| 2026-06-07 12:00 |
14:12:17.19 |
-15:25:51.1 |
HIP 69455 |
17.71 |
| 2026-06-08 00:00 |
14:12:08.56 |
-15:25:02.6 |
HIP 69312 |
18.15 |
| 2026-06-08 12:00 |
14:12:00.08 |
-15:24:14.8 |
HIP 69312 |
16.14 |
| 2026-06-09 00:00 |
14:11:51.76 |
-15:23:27.8 |
HIP 69312 |
14.21 |
| 2026-06-09 12:00 |
14:11:43.60 |
-15:22:41.5 |
HIP 69312 |
12.39 |
| 2026-06-10 00:00 |
14:11:35.59 |
-15:21:55.8 |
HIP 69312 |
10.71 |
| 2026-06-10 12:00 |
14:11:27.75 |
-15:21:10.9 |
HIP 69312 |
9.21 |
| 2026-06-11 00:00 |
14:11:20.07 |
-15:20:26.8 |
HIP 69312 |
7.98 |
| 2026-06-11 12:00 |
14:11:12.55 |
-15:19:43.4 |
HIP 69312 |
7.11 |
| 2026-06-12 00:00 |
14:11:05.19 |
-15:19:00.7 |
HIP 69312 |
6.71 |
| 2026-06-12 12:00 |
14:10:58.00 |
-15:18:18.8 |
HIP 69273 |
6.80 |
| 2026-06-13 00:00 |
14:10:50.98 |
-15:17:37.7 |
HIP 69273 |
5.97 |
| 2026-06-13 12:00 |
14:10:44.12 |
-15:16:57.3 |
HIP 69273 |
5.64 |
| 2026-06-14 00:00 |
14:10:37.42 |
-15:16:17.7 |
HIP 69273 |
5.85 |
| 2026-06-14 12:00 |
14:10:30.90 |
-15:15:38.9 |
HIP 69273 |
6.51 |
| 2026-06-15 00:00 |
14:10:24.54 |
-15:15:00.9 |
HIP 69273 |
7.47 |
| 2026-06-15 12:00 |
14:10:18.35 |
-15:14:23.7 |
HIP 69273 |
8.62 |
| 2026-06-16 00:00 |
14:10:12.33 |
-15:13:47.3 |
HIP 69273 |
9.85 |
| 2026-06-16 12:00 |
14:10:06.48 |
-15:13:11.6 |
HIP 69273 |
11.14 |
| 2026-06-17 00:00 |
14:10:00.81 |
-15:12:36.8 |
HIP 69273 |
12.44 |
| 2026-06-17 12:00 |
14:09:55.30 |
-15:12:02.9 |
HIP 69273 |
13.74 |
| 2026-06-18 00:00 |
14:09:49.97 |
-15:11:29.7 |
HIP 69273 |
15.02 |
| 2026-06-18 12:00 |
14:09:44.80 |
-15:10:57.4 |
HIP 69273 |
16.28 |
| 2026-06-19 00:00 |
14:09:39.81 |
-15:10:25.8 |
HIP 69273 |
17.51 |
| 2026-06-19 12:00 |
14:09:35.00 |
-15:09:55.2 |
HIP 69273 |
18.71 |
| 2026-06-20 00:00 |
14:09:30.35 |
-15:09:25.3 |
HIP 69273 |
19.88 |
| 2026-06-20 12:00 |
14:09:25.88 |
-15:08:56.3 |
HIP 69273 |
21.01 |
| 2026-06-21 00:00 |
14:09:21.59 |
-15:08:28.2 |
HIP 69273 |
22.10 |
| 2026-06-21 12:00 |
14:09:17.46 |
-15:08:00.8 |
HIP 69273 |
23.15 |
| 2026-06-22 00:00 |
14:09:13.52 |
-15:07:34.4 |
HIP 69273 |
24.17 |