91P/Russell 3
メタデータ
| 項目 |
値 |
| Designation |
91P/Russell 3 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-06-27T02:09:49.521600Z |
| Orbit solution date (soln_date, UTC) |
2021-09-07T13:51:26Z |
| Obs used |
337 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
21.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2008-04-19.0000000 |
| e |
0.33022414 |
| q (au) |
2.605665 |
| a (au) |
3.890354 |
| i (deg) |
14.092166 |
| Ω (om, deg) |
247.895980 |
| ω (w, deg) |
354.865752 |
| M (ma, deg) |
131.902421 |
等級
散乱 + 全体線形
$$
M_a = (17.424 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.424 |
| n |
2.000 |
| gf |
0.834 |
| gb |
-0.704 |
| k |
0.891 |
| δ90 |
2.146 |
| 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) |
| 2026-02-03 00:00 |
06:07:13.74 |
+11:33:26.2 |
HIP 29111 |
17.26 |
| 2026-02-03 12:00 |
06:07:02.61 |
+11:33:43.8 |
HIP 29111 |
19.93 |
| 2026-02-04 00:00 |
06:06:51.68 |
+11:34:01.9 |
HIP 29111 |
22.58 |
| 2026-02-04 12:00 |
06:06:40.95 |
+11:34:20.4 |
HIP 28850 |
20.75 |
| 2026-02-05 00:00 |
06:06:30.42 |
+11:34:39.4 |
HIP 28850 |
18.28 |
| 2026-02-05 12:00 |
06:06:20.10 |
+11:34:58.9 |
HIP 28850 |
15.91 |
| 2026-02-06 00:00 |
06:06:09.99 |
+11:35:18.9 |
HIP 28850 |
13.63 |
| 2026-02-06 12:00 |
06:06:00.08 |
+11:35:39.3 |
HIP 28850 |
11.48 |
| 2026-02-07 00:00 |
06:05:50.39 |
+11:36:00.2 |
HIP 28850 |
9.51 |
| 2026-02-07 12:00 |
06:05:40.90 |
+11:36:21.5 |
HIP 28850 |
7.79 |
| 2026-02-08 00:00 |
06:05:31.63 |
+11:36:43.2 |
HIP 28850 |
6.50 |
| 2026-02-08 12:00 |
06:05:22.56 |
+11:37:05.4 |
HIP 28850 |
5.86 |
| 2026-02-09 00:00 |
06:05:13.72 |
+11:37:28.0 |
HIP 28850 |
6.01 |
| 2026-02-09 12:00 |
06:05:05.08 |
+11:37:51.1 |
HIP 28850 |
6.86 |
| 2026-02-10 00:00 |
06:04:56.67 |
+11:38:14.5 |
HIP 28850 |
8.15 |
| 2026-02-10 12:00 |
06:04:48.47 |
+11:38:38.4 |
HIP 28850 |
9.67 |
| 2026-02-11 00:00 |
06:04:40.49 |
+11:39:02.6 |
HIP 28850 |
11.31 |
| 2026-02-11 12:00 |
06:04:32.72 |
+11:39:27.3 |
HIP 28850 |
12.99 |
| 2026-02-12 00:00 |
06:04:25.18 |
+11:39:52.3 |
HIP 28850 |
14.69 |
| 2026-02-12 12:00 |
06:04:17.86 |
+11:40:17.7 |
HIP 28686 |
13.01 |
| 2026-02-13 00:00 |
06:04:10.76 |
+11:40:43.5 |
HIP 28686 |
11.26 |
| 2026-02-13 12:00 |
06:04:03.88 |
+11:41:09.7 |
HIP 28686 |
9.58 |
| 2026-02-14 00:00 |
06:03:57.23 |
+11:41:36.2 |
HIP 28686 |
7.98 |
| 2026-02-14 12:00 |
06:03:50.80 |
+11:42:03.1 |
HIP 28686 |
6.48 |
| 2026-02-15 00:00 |
06:03:44.59 |
+11:42:30.3 |
HIP 28686 |
5.12 |
| 2026-02-15 12:00 |
06:03:38.61 |
+11:42:57.8 |
HIP 28686 |
3.98 |
| 2026-02-16 00:00 |
06:03:32.86 |
+11:43:25.7 |
HIP 28686 |
3.24 |
| 2026-02-16 12:00 |
06:03:27.33 |
+11:43:53.9 |
HIP 28686 |
3.10 |
| 2026-02-17 00:00 |
06:03:22.03 |
+11:44:22.5 |
HIP 28686 |
3.57 |
| 2026-02-17 12:00 |
06:03:16.95 |
+11:44:51.3 |
HIP 28686 |
4.43 |
| 2026-02-18 00:00 |
06:03:12.11 |
+11:45:20.4 |
HIP 28686 |
5.44 |
| 2026-02-18 12:00 |
06:03:07.49 |
+11:45:49.8 |
HIP 28686 |
6.52 |
| 2026-02-19 00:00 |
06:03:03.11 |
+11:46:19.6 |
HIP 28686 |
7.61 |
| 2026-02-19 12:00 |
06:02:58.95 |
+11:46:49.6 |
HIP 28686 |
8.69 |
| 2026-02-20 00:00 |
06:02:55.02 |
+11:47:19.8 |
HIP 28686 |
9.74 |
| 2026-02-20 12:00 |
06:02:51.32 |
+11:47:50.3 |
HIP 28686 |
10.76 |
| 2026-02-21 00:00 |
06:02:47.85 |
+11:48:21.1 |
HIP 28686 |
11.74 |
| 2026-02-21 12:00 |
06:02:44.61 |
+11:48:52.1 |
HIP 28686 |
12.68 |
| 2026-02-22 00:00 |
06:02:41.60 |
+11:49:23.4 |
HIP 28586 |
13.47 |
| 2026-02-22 12:00 |
06:02:38.82 |
+11:49:54.9 |
HIP 28586 |
13.43 |
| 2026-02-23 00:00 |
06:02:36.27 |
+11:50:26.6 |
HIP 28586 |
13.48 |
| 2026-02-23 12:00 |
06:02:33.95 |
+11:50:58.5 |
HIP 28586 |
13.61 |
| 2026-02-24 00:00 |
06:02:31.86 |
+11:51:30.7 |
HIP 28586 |
13.82 |