メタデータ
| 項目 |
値 |
| Designation |
322P/SOHO |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-09-04T01:32:14.300160Z |
| Orbit solution date (soln_date, UTC) |
2016-10-27T11:29:40Z |
| Obs used |
318 |
| NEO |
Yes |
| M1 |
19.000 |
| 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) |
2015-06-06.0000000 |
| e |
0.97867648 |
| q (au) |
0.053656 |
| a (au) |
2.516261 |
| i (deg) |
12.589236 |
| Ω (om, deg) |
359.524488 |
| ω (w, deg) |
49.049477 |
| M (ma, deg) |
337.760659 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 4.648\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
4.648 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
14:10:32.47 |
-24:20:36.3 |
HIP 69398 |
25.56 |
| 2026-07-29 12:00 |
14:10:33.26 |
-24:19:21.6 |
HIP 69398 |
25.47 |
| 2026-07-30 00:00 |
14:10:34.30 |
-24:18:08.3 |
HIP 69398 |
25.38 |
| 2026-07-30 12:00 |
14:10:35.58 |
-24:16:56.4 |
HIP 69398 |
25.30 |
| 2026-07-31 00:00 |
14:10:37.10 |
-24:15:45.9 |
HIP 69398 |
25.21 |
| 2026-07-31 12:00 |
14:10:38.86 |
-24:14:36.8 |
HIP 69398 |
25.13 |
| 2026-08-01 00:00 |
14:10:40.87 |
-24:13:29.1 |
HIP 69398 |
25.05 |
| 2026-08-01 12:00 |
14:10:43.11 |
-24:12:22.8 |
HIP 69398 |
24.96 |
| 2026-08-02 00:00 |
14:10:45.58 |
-24:11:17.9 |
HIP 69398 |
24.88 |
| 2026-08-02 12:00 |
14:10:48.30 |
-24:10:14.5 |
HIP 69398 |
24.80 |
| 2026-08-03 00:00 |
14:10:51.24 |
-24:09:12.4 |
HIP 69398 |
24.72 |
| 2026-08-03 12:00 |
14:10:54.43 |
-24:08:11.7 |
HIP 69398 |
24.64 |
| 2026-08-04 00:00 |
14:10:57.84 |
-24:07:12.4 |
HIP 69398 |
24.57 |
| 2026-08-04 12:00 |
14:11:01.49 |
-24:06:14.5 |
HIP 69398 |
24.51 |
| 2026-08-05 00:00 |
14:11:05.36 |
-24:05:18.0 |
HIP 69398 |
24.46 |
| 2026-08-05 12:00 |
14:11:09.47 |
-24:04:22.8 |
HIP 69398 |
24.42 |
| 2026-08-06 00:00 |
14:11:13.80 |
-24:03:29.1 |
HIP 69398 |
24.41 |
| 2026-08-06 12:00 |
14:11:18.36 |
-24:02:36.7 |
HIP 69375 |
23.42 |
| 2026-08-07 00:00 |
14:11:23.15 |
-24:01:45.8 |
HIP 69375 |
22.15 |
| 2026-08-07 12:00 |
14:11:28.16 |
-24:00:56.2 |
HIP 69375 |
20.90 |
| 2026-08-08 00:00 |
14:11:33.39 |
-24:00:07.9 |
HIP 69375 |
19.68 |
| 2026-08-08 12:00 |
14:11:38.85 |
-23:59:21.1 |
HIP 69375 |
18.48 |
| 2026-08-09 00:00 |
14:11:44.53 |
-23:58:35.6 |
HIP 69375 |
17.34 |
| 2026-08-09 12:00 |
14:11:50.43 |
-23:57:51.5 |
HIP 69375 |
16.27 |
| 2026-08-10 00:00 |
14:11:56.55 |
-23:57:08.8 |
HIP 69375 |
15.28 |
| 2026-08-10 12:00 |
14:12:02.89 |
-23:56:27.4 |
HIP 69375 |
14.43 |
| 2026-08-11 00:00 |
14:12:09.44 |
-23:55:47.4 |
HIP 69375 |
13.73 |
| 2026-08-11 12:00 |
14:12:16.21 |
-23:55:08.7 |
HIP 69375 |
13.23 |
| 2026-08-12 00:00 |
14:12:23.20 |
-23:54:31.4 |
HIP 69375 |
12.96 |
| 2026-08-12 12:00 |
14:12:30.40 |
-23:53:55.4 |
HIP 69375 |
12.96 |
| 2026-08-13 00:00 |
14:12:37.81 |
-23:53:20.8 |
HIP 69375 |
13.24 |
| 2026-08-13 12:00 |
14:12:45.44 |
-23:52:47.5 |
HIP 69375 |
13.79 |
| 2026-08-14 00:00 |
14:12:53.27 |
-23:52:15.5 |
HIP 69375 |
14.61 |
| 2026-08-14 12:00 |
14:13:01.31 |
-23:51:44.9 |
HIP 69375 |
15.66 |
| 2026-08-15 00:00 |
14:13:09.56 |
-23:51:15.6 |
HIP 69375 |
16.91 |
| 2026-08-15 12:00 |
14:13:18.01 |
-23:50:47.6 |
HIP 69375 |
18.34 |
| 2026-08-16 00:00 |
14:13:26.67 |
-23:50:20.9 |
HIP 69375 |
19.91 |
| 2026-08-16 12:00 |
14:13:35.53 |
-23:49:55.5 |
HIP 69375 |
21.62 |
| 2026-08-17 00:00 |
14:13:44.60 |
-23:49:31.4 |
HIP 69375 |
23.43 |
| 2026-08-17 12:00 |
14:13:53.86 |
-23:49:08.6 |
HIP 69375 |
25.34 |
| 2026-08-18 00:00 |
14:14:03.32 |
-23:48:47.1 |
HIP 69696 |
26.61 |
| 2026-08-18 12:00 |
14:14:12.98 |
-23:48:26.8 |
HIP 69696 |
24.49 |
| 2026-08-19 00:00 |
14:14:22.84 |
-23:48:07.9 |
HIP 69696 |
22.34 |