メタデータ
| 項目 |
値 |
| Designation |
C/2015 P3 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-07-27T19:07:02.274240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
132 |
| NEO |
- |
| M1 |
16.300 |
| K1 |
10.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-08-17.0000000 |
| e |
0.99710074 |
| q (au) |
0.715220 |
| a (au) |
246.691015 |
| i (deg) |
58.183707 |
| Ω (om, deg) |
88.145306 |
| ω (w, deg) |
132.872099 |
| M (ma, deg) |
0.005139 |
等級
散乱 + 全体線形
$$
M_a = (16.714 + 5.525\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.714 |
| n |
5.525 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
03:34:20.42 |
-31:44:45.3 |
HIP 16672 |
8.22 |
| 2026-05-12 12:00 |
03:34:25.47 |
-31:44:28.9 |
HIP 16672 |
8.19 |
| 2026-05-13 00:00 |
03:34:30.53 |
-31:44:13.0 |
HIP 16672 |
8.30 |
| 2026-05-13 12:00 |
03:34:35.59 |
-31:43:57.4 |
HIP 16672 |
8.54 |
| 2026-05-14 00:00 |
03:34:40.65 |
-31:43:42.3 |
HIP 16672 |
8.91 |
| 2026-05-14 12:00 |
03:34:45.71 |
-31:43:27.6 |
HIP 16672 |
9.39 |
| 2026-05-15 00:00 |
03:34:50.77 |
-31:43:13.3 |
HIP 16672 |
9.96 |
| 2026-05-15 12:00 |
03:34:55.84 |
-31:42:59.4 |
HIP 16672 |
10.61 |
| 2026-05-16 00:00 |
03:35:00.90 |
-31:42:46.0 |
HIP 16672 |
11.32 |
| 2026-05-16 12:00 |
03:35:05.97 |
-31:42:32.9 |
HIP 16672 |
12.09 |
| 2026-05-17 00:00 |
03:35:11.03 |
-31:42:20.3 |
HIP 16672 |
12.90 |
| 2026-05-17 12:00 |
03:35:16.10 |
-31:42:08.1 |
HIP 16672 |
13.74 |
| 2026-05-18 00:00 |
03:35:21.16 |
-31:41:56.3 |
HIP 16672 |
14.61 |
| 2026-05-18 12:00 |
03:35:26.23 |
-31:41:44.9 |
HIP 16672 |
15.51 |
| 2026-05-19 00:00 |
03:35:31.29 |
-31:41:34.0 |
HIP 16672 |
16.42 |
| 2026-05-19 12:00 |
03:35:36.35 |
-31:41:23.4 |
HIP 16672 |
17.35 |
| 2026-05-20 00:00 |
03:35:41.40 |
-31:41:13.3 |
HIP 16672 |
18.29 |
| 2026-05-20 12:00 |
03:35:46.46 |
-31:41:03.6 |
HIP 16672 |
19.25 |
| 2026-05-21 00:00 |
03:35:51.51 |
-31:40:54.3 |
HIP 16672 |
20.21 |
| 2026-05-21 12:00 |
03:35:56.56 |
-31:40:45.5 |
HIP 16672 |
21.18 |
| 2026-05-22 00:00 |
03:36:01.61 |
-31:40:37.1 |
HIP 16672 |
22.16 |
| 2026-05-22 12:00 |
03:36:06.65 |
-31:40:29.1 |
HIP 16672 |
23.14 |
| 2026-05-23 00:00 |
03:36:11.69 |
-31:40:21.5 |
HIP 16672 |
24.12 |
| 2026-05-23 12:00 |
03:36:16.72 |
-31:40:14.3 |
HIP 16672 |
25.11 |
| 2026-05-24 00:00 |
03:36:21.75 |
-31:40:07.6 |
HIP 16672 |
26.10 |
| 2026-05-24 12:00 |
03:36:26.77 |
-31:40:01.2 |
HIP 16672 |
27.10 |
| 2026-05-25 00:00 |
03:36:31.79 |
-31:39:55.3 |
HIP 16672 |
28.09 |
| 2026-05-25 12:00 |
03:36:36.81 |
-31:39:49.9 |
HIP 16672 |
29.09 |
| 2026-05-26 00:00 |
03:36:41.81 |
-31:39:44.8 |
HIP 16958 |
28.75 |
| 2026-05-26 12:00 |
03:36:46.82 |
-31:39:40.1 |
HIP 16958 |
28.01 |
| 2026-05-27 00:00 |
03:36:51.81 |
-31:39:35.9 |
HIP 16958 |
27.29 |
| 2026-05-27 12:00 |
03:36:56.80 |
-31:39:32.1 |
HIP 16958 |
26.60 |
| 2026-05-28 00:00 |
03:37:01.78 |
-31:39:28.7 |
HIP 16958 |
25.95 |
| 2026-05-28 12:00 |
03:37:06.75 |
-31:39:25.8 |
HIP 16958 |
25.33 |
| 2026-05-29 00:00 |
03:37:11.72 |
-31:39:23.2 |
HIP 16958 |
24.75 |
| 2026-05-29 12:00 |
03:37:16.68 |
-31:39:21.1 |
HIP 16958 |
24.20 |
| 2026-05-30 00:00 |
03:37:21.63 |
-31:39:19.4 |
HIP 16958 |
23.70 |
| 2026-05-30 12:00 |
03:37:26.57 |
-31:39:18.1 |
HIP 16958 |
23.24 |
| 2026-05-31 00:00 |
03:37:31.50 |
-31:39:17.2 |
HIP 16958 |
22.83 |
| 2026-05-31 12:00 |
03:37:36.43 |
-31:39:16.8 |
HIP 16958 |
22.47 |
| 2026-06-01 00:00 |
03:37:41.34 |
-31:39:16.8 |
HIP 16958 |
22.16 |
| 2026-06-01 12:00 |
03:37:46.25 |
-31:39:17.2 |
HIP 16958 |
21.90 |
| 2026-06-02 00:00 |
03:37:51.15 |
-31:39:18.0 |
HIP 16958 |
21.69 |