メタデータ
| 項目 |
値 |
| Designation |
77P/Longmore |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-05-14T10:34:06.706560Z |
| Orbit solution date (soln_date, UTC) |
2026-09-08T08:45:48Z |
| Obs used |
2631 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
14.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-02-08.0000000 |
| e |
0.35416712 |
| q (au) |
2.333313 |
| a (au) |
3.612874 |
| i (deg) |
24.340101 |
| Ω (om, deg) |
14.886702 |
| ω (w, deg) |
196.945535 |
| M (ma, deg) |
241.385909 |
等級
散乱 + 全体線形
$$
M_a = (8.016 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.016 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.866 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
02:12:34.90 |
+22:12:06.2 |
HIP 10276 |
13.70 |
| 2026-09-20 12:00 |
02:12:20.05 |
+22:12:38.9 |
HIP 10276 |
13.69 |
| 2026-09-21 00:00 |
02:12:05.01 |
+22:13:10.5 |
HIP 10276 |
14.53 |
| 2026-09-21 12:00 |
02:11:49.79 |
+22:13:40.9 |
HIP 10276 |
16.11 |
| 2026-09-22 00:00 |
02:11:34.37 |
+22:14:10.0 |
HIP 10276 |
18.26 |
| 2026-09-22 12:00 |
02:11:18.77 |
+22:14:38.0 |
HIP 10276 |
20.84 |
| 2026-09-23 00:00 |
02:11:02.99 |
+22:15:04.8 |
HIP 10276 |
23.71 |
| 2026-09-23 12:00 |
02:10:47.02 |
+22:15:30.3 |
HIP 10065 |
22.72 |
| 2026-09-24 00:00 |
02:10:30.87 |
+22:15:54.7 |
HIP 10065 |
20.36 |
| 2026-09-24 12:00 |
02:10:14.55 |
+22:16:17.8 |
HIP 10065 |
18.42 |
| 2026-09-25 00:00 |
02:09:58.04 |
+22:16:39.7 |
HIP 10019 |
14.98 |
| 2026-09-25 12:00 |
02:09:41.36 |
+22:17:00.5 |
HIP 10019 |
11.55 |
| 2026-09-26 00:00 |
02:09:24.51 |
+22:17:20.0 |
HIP 10019 |
8.50 |
| 2026-09-26 12:00 |
02:09:07.49 |
+22:17:38.2 |
HIP 10019 |
6.47 |
| 2026-09-27 00:00 |
02:08:50.29 |
+22:17:55.3 |
HIP 10019 |
6.56 |
| 2026-09-27 12:00 |
02:08:32.93 |
+22:18:11.1 |
HIP 10019 |
8.77 |
| 2026-09-28 00:00 |
02:08:15.41 |
+22:18:25.7 |
HIP 10019 |
12.00 |
| 2026-09-28 12:00 |
02:07:57.72 |
+22:18:39.0 |
HIP 10019 |
15.67 |
| 2026-09-29 00:00 |
02:07:39.87 |
+22:18:51.2 |
HIP 10019 |
19.55 |
| 2026-09-29 12:00 |
02:07:21.86 |
+22:19:02.1 |
HIP 9796 |
21.49 |
| 2026-09-30 00:00 |
02:07:03.69 |
+22:19:11.7 |
HIP 9796 |
17.91 |
| 2026-09-30 12:00 |
02:06:45.37 |
+22:19:20.1 |
HIP 9796 |
14.62 |
| 2026-10-01 00:00 |
02:06:26.90 |
+22:19:27.3 |
HIP 9796 |
11.92 |
| 2026-10-01 12:00 |
02:06:08.28 |
+22:19:33.3 |
HIP 9796 |
10.31 |
| 2026-10-02 00:00 |
02:05:49.51 |
+22:19:38.0 |
HIP 9796 |
10.37 |
| 2026-10-02 12:00 |
02:05:30.59 |
+22:19:41.4 |
HIP 9796 |
12.10 |
| 2026-10-03 00:00 |
02:05:11.54 |
+22:19:43.6 |
HIP 9796 |
14.96 |
| 2026-10-03 12:00 |
02:04:52.34 |
+22:19:44.6 |
HIP 9796 |
18.46 |
| 2026-10-04 00:00 |
02:04:33.01 |
+22:19:44.4 |
HIP 9796 |
22.32 |
| 2026-10-04 12:00 |
02:04:13.54 |
+22:19:42.9 |
HIP 9796 |
26.39 |
| 2026-10-05 00:00 |
02:03:53.94 |
+22:19:40.1 |
HIP 9492 |
28.12 |
| 2026-10-05 12:00 |
02:03:34.21 |
+22:19:36.2 |
HIP 9492 |
24.17 |
| 2026-10-06 00:00 |
02:03:14.35 |
+22:19:31.0 |
HIP 9492 |
20.44 |
| 2026-10-06 12:00 |
02:02:54.38 |
+22:19:24.6 |
HIP 9492 |
17.10 |
| 2026-10-07 00:00 |
02:02:34.28 |
+22:19:16.9 |
HIP 9492 |
14.46 |
| 2026-10-07 12:00 |
02:02:14.06 |
+22:19:08.0 |
HIP 9492 |
12.98 |
| 2026-10-08 00:00 |
02:01:53.73 |
+22:18:57.9 |
HIP 9492 |
13.09 |
| 2026-10-08 12:00 |
02:01:33.29 |
+22:18:46.6 |
HIP 9492 |
14.78 |
| 2026-10-09 00:00 |
02:01:12.74 |
+22:18:34.1 |
HIP 9492 |
17.62 |
| 2026-10-09 12:00 |
02:00:52.09 |
+22:18:20.4 |
HIP 9492 |
21.17 |
| 2026-10-10 00:00 |
02:00:31.34 |
+22:18:05.5 |
HIP 9454 |
24.65 |
| 2026-10-10 12:00 |
02:00:10.49 |
+22:17:49.4 |
HIP 9260 |
27.82 |
| 2026-10-11 00:00 |
01:59:49.54 |
+22:17:32.1 |
HIP 9260 |
25.14 |