162P/Siding Spring
メタデータ
| 項目 |
値 |
| Designation |
162P/Siding Spring |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-03-08T10:33:48.648960Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:41Z |
| Obs used |
3224 |
| NEO |
Yes |
| M1 |
15.200 |
| 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) |
2010-12-01.0000000 |
| e |
0.59607784 |
| q (au) |
1.233274 |
| a (au) |
3.053246 |
| i (deg) |
27.817056 |
| Ω (om, deg) |
31.236338 |
| ω (w, deg) |
356.327515 |
| M (ma, deg) |
49.429050 |
等級
散乱 + 全体線形
$$
M_a = (13.651 + 2.493\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.651 |
| n |
2.493 |
| gf |
0.924 |
| gb |
-0.877 |
| k |
0.998 |
| 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) |
| 2026-02-03 00:00 |
21:40:13.40 |
-31:50:09.3 |
HIP 107058 |
11.08 |
| 2026-02-03 12:00 |
21:41:40.43 |
-31:41:10.4 |
HIP 107058 |
16.67 |
| 2026-02-04 00:00 |
21:43:07.42 |
-31:32:07.9 |
HIP 107261 |
17.98 |
| 2026-02-04 12:00 |
21:44:34.38 |
-31:23:01.8 |
HIP 107261 |
15.62 |
| 2026-02-05 00:00 |
21:46:01.29 |
-31:13:52.0 |
HIP 107399 |
27.28 |
| 2026-02-05 12:00 |
21:47:28.16 |
-31:04:38.7 |
HIP 107608 |
11.28 |
| 2026-02-06 00:00 |
21:48:54.99 |
-30:55:21.7 |
HIP 107608 |
15.26 |
| 2026-02-06 12:00 |
21:50:21.78 |
-30:46:01.0 |
HIP 107927 |
34.11 |
| 2026-02-07 00:00 |
21:51:48.52 |
-30:36:36.8 |
HIP 107927 |
17.74 |
| 2026-02-07 12:00 |
21:53:15.23 |
-30:27:09.0 |
HIP 107927 |
18.45 |
| 2026-02-08 00:00 |
21:54:41.89 |
-30:17:37.5 |
HIP 108132 |
4.11 |
| 2026-02-08 12:00 |
21:56:08.50 |
-30:08:02.4 |
HIP 108215 |
11.65 |
| 2026-02-09 00:00 |
21:57:35.08 |
-29:58:23.8 |
HIP 108474 |
18.24 |
| 2026-02-09 12:00 |
21:59:01.61 |
-29:48:41.6 |
HIP 108474 |
8.39 |
| 2026-02-10 00:00 |
22:00:28.09 |
-29:38:55.8 |
HIP 108579 |
22.17 |
| 2026-02-10 12:00 |
22:01:54.52 |
-29:29:06.4 |
HIP 108908 |
24.24 |
| 2026-02-11 00:00 |
22:03:20.91 |
-29:19:13.4 |
HIP 108908 |
4.26 |
| 2026-02-11 12:00 |
22:04:47.26 |
-29:09:16.9 |
HIP 108908 |
18.81 |
| 2026-02-12 00:00 |
22:06:13.56 |
-28:59:16.8 |
HIP 109125 |
4.98 |
| 2026-02-12 12:00 |
22:07:39.80 |
-28:49:13.2 |
HIP 109128 |
19.94 |
| 2026-02-13 00:00 |
22:09:06.01 |
-28:39:06.0 |
HIP 109394 |
11.71 |
| 2026-02-13 12:00 |
22:10:32.16 |
-28:28:55.3 |
HIP 109412 |
13.38 |
| 2026-02-14 00:00 |
22:11:58.26 |
-28:18:41.1 |
HIP 109412 |
26.03 |
| 2026-02-14 12:00 |
22:13:24.32 |
-28:08:23.4 |
HIP 109789 |
25.40 |
| 2026-02-15 00:00 |
22:14:50.32 |
-27:58:02.2 |
HIP 109789 |
13.90 |
| 2026-02-15 12:00 |
22:16:16.28 |
-27:47:37.5 |
HIP 109789 |
26.05 |
| 2026-02-16 00:00 |
22:17:42.18 |
-27:37:09.3 |
HIP 110039 |
14.82 |
| 2026-02-16 12:00 |
22:19:08.03 |
-27:26:37.6 |
HIP 110238 |
9.47 |
| 2026-02-17 00:00 |
22:20:33.83 |
-27:16:02.5 |
HIP 110238 |
12.51 |
| 2026-02-17 12:00 |
22:21:59.59 |
-27:05:23.9 |
HIP 110466 |
21.30 |
| 2026-02-18 00:00 |
22:23:25.28 |
-26:54:41.9 |
HIP 110641 |
18.37 |
| 2026-02-18 12:00 |
22:24:50.93 |
-26:43:56.5 |
HIP 110641 |
7.71 |
| 2026-02-19 00:00 |
22:26:16.52 |
-26:33:07.6 |
HIP 110861 |
20.17 |
| 2026-02-19 12:00 |
22:27:42.06 |
-26:22:15.4 |
HIP 110861 |
2.94 |
| 2026-02-20 00:00 |
22:29:07.55 |
-26:11:19.7 |
HIP 110922 |
19.90 |
| 2026-02-20 12:00 |
22:30:32.98 |
-26:00:20.7 |
HIP 111138 |
6.19 |
| 2026-02-21 00:00 |
22:31:58.37 |
-25:49:18.3 |
HIP 111138 |
20.96 |
| 2026-02-21 12:00 |
22:33:23.69 |
-25:38:12.6 |
HIP 111370 |
5.08 |
| 2026-02-22 00:00 |
22:34:48.96 |
-25:27:03.5 |
HIP 111391 |
16.65 |
| 2026-02-22 12:00 |
22:36:14.18 |
-25:15:51.1 |
HIP 111703 |
20.54 |
| 2026-02-23 00:00 |
22:37:39.35 |
-25:04:35.3 |
HIP 111703 |
5.42 |
| 2026-02-23 12:00 |
22:39:04.46 |
-24:53:16.3 |
HIP 111742 |
19.89 |
| 2026-02-24 00:00 |
22:40:29.51 |
-24:41:54.0 |
HIP 111996 |
28.93 |