メタデータ
| 項目 |
値 |
| Designation |
29P/Schwassmann-Wachmann 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-04-16T10:13:18.243840Z |
| Orbit solution date (soln_date, UTC) |
2025-04-14T15:28:00Z |
| Obs used |
739 |
| NEO |
- |
| M1 |
10.100 |
| 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) |
2022-10-14.0000000 |
| e |
0.04479814 |
| q (au) |
5.775128 |
| a (au) |
6.045977 |
| i (deg) |
9.364771 |
| Ω (om, deg) |
312.390917 |
| ω (w, deg) |
50.662700 |
| M (ma, deg) |
84.635081 |
等級
散乱 + 全体線形
$$
M_a = (10.969 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.969 |
| n |
2.000 |
| gf |
0.965 |
| gb |
-0.719 |
| k |
0.800 |
| δ90 |
9.953 |
| 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) |
| 2026-06-01 00:00 |
11:00:33.27 |
-00:53:27.6 |
HIP 53865 |
13.39 |
| 2026-06-01 12:00 |
11:00:38.44 |
-00:53:41.0 |
HIP 53865 |
12.35 |
| 2026-06-02 00:00 |
11:00:43.74 |
-00:53:55.4 |
HIP 53865 |
11.33 |
| 2026-06-02 12:00 |
11:00:49.17 |
-00:54:10.6 |
HIP 53865 |
10.36 |
| 2026-06-03 00:00 |
11:00:54.74 |
-00:54:26.6 |
HIP 53865 |
9.46 |
| 2026-06-03 12:00 |
11:01:00.44 |
-00:54:43.5 |
HIP 53865 |
8.68 |
| 2026-06-04 00:00 |
11:01:06.27 |
-00:55:01.3 |
HIP 53865 |
8.07 |
| 2026-06-04 12:00 |
11:01:12.24 |
-00:55:19.9 |
HIP 53865 |
7.68 |
| 2026-06-05 00:00 |
11:01:18.33 |
-00:55:39.4 |
HIP 53865 |
7.58 |
| 2026-06-05 12:00 |
11:01:24.56 |
-00:55:59.7 |
HIP 53865 |
7.80 |
| 2026-06-06 00:00 |
11:01:30.92 |
-00:56:20.9 |
HIP 53865 |
8.33 |
| 2026-06-06 12:00 |
11:01:37.40 |
-00:56:42.9 |
HIP 53865 |
9.14 |
| 2026-06-07 00:00 |
11:01:44.02 |
-00:57:05.8 |
HIP 53865 |
10.18 |
| 2026-06-07 12:00 |
11:01:50.76 |
-00:57:29.6 |
HIP 53865 |
11.39 |
| 2026-06-08 00:00 |
11:01:57.63 |
-00:57:54.2 |
HIP 53865 |
12.76 |
| 2026-06-08 12:00 |
11:02:04.63 |
-00:58:19.6 |
HIP 53865 |
14.23 |
| 2026-06-09 00:00 |
11:02:11.76 |
-00:58:45.9 |
HIP 53865 |
15.80 |
| 2026-06-09 12:00 |
11:02:19.02 |
-00:59:13.0 |
HIP 53865 |
17.45 |
| 2026-06-10 00:00 |
11:02:26.40 |
-00:59:41.0 |
HIP 54027 |
18.89 |
| 2026-06-10 12:00 |
11:02:33.91 |
-01:00:09.9 |
HIP 54027 |
18.15 |
| 2026-06-11 00:00 |
11:02:41.54 |
-01:00:39.6 |
HIP 54027 |
17.59 |
| 2026-06-11 12:00 |
11:02:49.30 |
-01:01:10.1 |
HIP 54027 |
17.24 |
| 2026-06-12 00:00 |
11:02:57.18 |
-01:01:41.5 |
HIP 54027 |
17.13 |
| 2026-06-12 12:00 |
11:03:05.19 |
-01:02:13.7 |
HIP 54027 |
17.26 |
| 2026-06-13 00:00 |
11:03:13.32 |
-01:02:46.8 |
HIP 54027 |
17.66 |
| 2026-06-13 12:00 |
11:03:21.57 |
-01:03:20.7 |
HIP 54027 |
18.31 |
| 2026-06-14 00:00 |
11:03:29.94 |
-01:03:55.5 |
HIP 54110 |
17.74 |
| 2026-06-14 12:00 |
11:03:38.44 |
-01:04:31.1 |
HIP 54110 |
15.88 |
| 2026-06-15 00:00 |
11:03:47.06 |
-01:05:07.5 |
HIP 54110 |
14.09 |
| 2026-06-15 12:00 |
11:03:55.80 |
-01:05:44.8 |
HIP 54110 |
12.41 |
| 2026-06-16 00:00 |
11:04:04.66 |
-01:06:22.9 |
HIP 54110 |
10.93 |
| 2026-06-16 12:00 |
11:04:13.64 |
-01:07:01.8 |
HIP 54110 |
9.76 |
| 2026-06-17 00:00 |
11:04:22.74 |
-01:07:41.6 |
HIP 54110 |
9.04 |
| 2026-06-17 12:00 |
11:04:31.95 |
-01:08:22.2 |
HIP 54110 |
8.91 |
| 2026-06-18 00:00 |
11:04:41.28 |
-01:09:03.6 |
HIP 54110 |
9.42 |
| 2026-06-18 12:00 |
11:04:50.73 |
-01:09:45.9 |
HIP 54110 |
10.49 |
| 2026-06-19 00:00 |
11:05:00.30 |
-01:10:28.9 |
HIP 54110 |
12.00 |
| 2026-06-19 12:00 |
11:05:09.98 |
-01:11:12.8 |
HIP 54110 |
13.82 |
| 2026-06-20 00:00 |
11:05:19.77 |
-01:11:57.5 |
HIP 54110 |
15.86 |
| 2026-06-20 12:00 |
11:05:29.68 |
-01:12:43.0 |
HIP 54110 |
18.05 |
| 2026-06-21 00:00 |
11:05:39.70 |
-01:13:29.4 |
HIP 54110 |
20.37 |
| 2026-06-21 12:00 |
11:05:49.84 |
-01:14:16.5 |
HIP 54110 |
22.78 |
| 2026-06-22 00:00 |
11:06:00.08 |
-01:15:04.4 |
HIP 54110 |
25.26 |