メタデータ
| 項目 |
値 |
| Designation |
P/2007 T2 (Kowalski) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-09-19T00:32:30.549120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:12Z |
| Obs used |
50 |
| NEO |
Yes |
| M1 |
18.500 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-11-07.0000000 |
| e |
0.77500898 |
| q (au) |
0.695817 |
| a (au) |
3.092645 |
| i (deg) |
9.896422 |
| Ω (om, deg) |
3.997657 |
| ω (w, deg) |
358.553636 |
| M (ma, deg) |
8.875747 |
等級
散乱 + 全体線形
$$
M_a = (18.609 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.609 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.952 |
| δ90 |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
11:52:14.79 |
+01:51:58.9 |
HIP 57757 |
24.14 |
| 2026-03-26 12:00 |
11:51:54.74 |
+01:53:53.4 |
HIP 57757 |
20.01 |
| 2026-03-27 00:00 |
11:51:34.73 |
+01:55:47.6 |
HIP 57757 |
16.60 |
| 2026-03-27 12:00 |
11:51:14.76 |
+01:57:41.3 |
HIP 57757 |
14.44 |
| 2026-03-28 00:00 |
11:50:54.84 |
+01:59:34.7 |
HIP 57757 |
14.07 |
| 2026-03-28 12:00 |
11:50:34.97 |
+02:01:27.8 |
HIP 57757 |
15.62 |
| 2026-03-29 00:00 |
11:50:15.15 |
+02:03:20.4 |
HIP 57681 |
12.73 |
| 2026-03-29 12:00 |
11:49:55.39 |
+02:05:12.5 |
HIP 57681 |
8.97 |
| 2026-03-30 00:00 |
11:49:35.69 |
+02:07:04.2 |
HIP 57681 |
7.38 |
| 2026-03-30 12:00 |
11:49:16.05 |
+02:08:55.5 |
HIP 57681 |
9.15 |
| 2026-03-31 00:00 |
11:48:56.47 |
+02:10:46.3 |
HIP 57681 |
12.95 |
| 2026-03-31 12:00 |
11:48:36.96 |
+02:12:36.6 |
HIP 57681 |
17.48 |
| 2026-04-01 00:00 |
11:48:17.52 |
+02:14:26.4 |
HIP 57525 |
18.81 |
| 2026-04-01 12:00 |
11:47:58.15 |
+02:16:15.6 |
HIP 57525 |
17.46 |
| 2026-04-02 00:00 |
11:47:38.85 |
+02:18:04.4 |
HIP 57525 |
17.59 |
| 2026-04-02 12:00 |
11:47:19.63 |
+02:19:52.5 |
HIP 57525 |
19.14 |
| 2026-04-03 00:00 |
11:47:00.49 |
+02:21:40.2 |
HIP 57525 |
21.80 |
| 2026-04-03 12:00 |
11:46:41.42 |
+02:23:27.2 |
HIP 57305 |
25.10 |
| 2026-04-04 00:00 |
11:46:22.45 |
+02:25:13.6 |
HIP 57305 |
20.65 |
| 2026-04-04 12:00 |
11:46:03.56 |
+02:26:59.4 |
HIP 57305 |
16.58 |
| 2026-04-05 00:00 |
11:45:44.75 |
+02:28:44.6 |
HIP 57305 |
13.20 |
| 2026-04-05 12:00 |
11:45:26.04 |
+02:30:29.2 |
HIP 57305 |
11.14 |
| 2026-04-06 00:00 |
11:45:07.42 |
+02:32:13.1 |
HIP 57305 |
11.11 |
| 2026-04-06 12:00 |
11:44:48.90 |
+02:33:56.3 |
HIP 57305 |
13.10 |
| 2026-04-07 00:00 |
11:44:30.48 |
+02:35:38.9 |
HIP 57305 |
16.36 |
| 2026-04-07 12:00 |
11:44:12.15 |
+02:37:20.8 |
HIP 57305 |
20.28 |
| 2026-04-08 00:00 |
11:43:53.93 |
+02:39:01.9 |
HIP 57305 |
24.51 |
| 2026-04-08 12:00 |
11:43:35.81 |
+02:40:42.3 |
HIP 57084 |
24.75 |
| 2026-04-09 00:00 |
11:43:17.80 |
+02:42:22.0 |
HIP 57084 |
20.02 |
| 2026-04-09 12:00 |
11:42:59.90 |
+02:44:01.0 |
HIP 57084 |
15.37 |
| 2026-04-10 00:00 |
11:42:42.11 |
+02:45:39.2 |
HIP 57084 |
10.84 |
| 2026-04-10 12:00 |
11:42:24.43 |
+02:47:16.6 |
HIP 57084 |
6.64 |
| 2026-04-11 00:00 |
11:42:06.87 |
+02:48:53.2 |
HIP 57084 |
3.86 |
| 2026-04-11 12:00 |
11:41:49.43 |
+02:50:29.0 |
HIP 57084 |
5.40 |
| 2026-04-12 00:00 |
11:41:32.11 |
+02:52:04.0 |
HIP 57084 |
9.27 |
| 2026-04-12 12:00 |
11:41:14.91 |
+02:53:38.2 |
HIP 57084 |
13.57 |
| 2026-04-13 00:00 |
11:40:57.84 |
+02:55:11.5 |
HIP 57084 |
17.97 |
| 2026-04-13 12:00 |
11:40:40.89 |
+02:56:44.0 |
HIP 56859 |
19.01 |
| 2026-04-14 00:00 |
11:40:24.07 |
+02:58:15.6 |
HIP 56859 |
15.75 |
| 2026-04-14 12:00 |
11:40:07.38 |
+02:59:46.4 |
HIP 56859 |
13.22 |
| 2026-04-15 00:00 |
11:39:50.82 |
+03:01:16.2 |
HIP 56859 |
11.87 |
| 2026-04-15 12:00 |
11:39:34.40 |
+03:02:45.2 |
HIP 56859 |
12.06 |
| 2026-04-16 00:00 |
11:39:18.11 |
+03:04:13.2 |
HIP 56859 |
13.69 |