77P/Longmore
メタデータ
| 項目 |
値 |
| Designation |
77P/Longmore |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-05-14T10:40:08.040000Z |
| Orbit solution date (soln_date, UTC) |
2025-10-29T22:11:34Z |
| Obs used |
2629 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
14.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-02-05.0000000 |
| e |
0.35416745 |
| q (au) |
2.333302 |
| a (au) |
3.612860 |
| i (deg) |
24.340171 |
| Ω (om, deg) |
14.886903 |
| ω (w, deg) |
196.946173 |
| M (ma, deg) |
240.954013 |
等級
散乱 + 全体線形
$$
M_a = (8.031 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.031 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.865 |
| 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) |
| 2026-02-03 00:00 |
00:20:28.77 |
+02:17:31.7 |
HIP 1596 |
43.30 |
| 2026-02-03 12:00 |
00:20:47.11 |
+02:20:25.3 |
HIP 1783 |
42.04 |
| 2026-02-04 00:00 |
00:21:05.54 |
+02:23:19.5 |
HIP 1609 |
41.14 |
| 2026-02-04 12:00 |
00:21:24.07 |
+02:26:14.0 |
HIP 1869 |
38.26 |
| 2026-02-05 00:00 |
00:21:42.69 |
+02:29:09.0 |
HIP 1869 |
32.78 |
| 2026-02-05 12:00 |
00:22:01.39 |
+02:32:04.4 |
HIP 1869 |
27.29 |
| 2026-02-06 00:00 |
00:22:20.19 |
+02:35:00.2 |
HIP 1869 |
21.78 |
| 2026-02-06 12:00 |
00:22:39.08 |
+02:37:56.5 |
HIP 1869 |
16.26 |
| 2026-02-07 00:00 |
00:22:58.05 |
+02:40:53.1 |
HIP 1869 |
10.76 |
| 2026-02-07 12:00 |
00:23:17.11 |
+02:43:50.2 |
HIP 1869 |
5.40 |
| 2026-02-08 00:00 |
00:23:36.26 |
+02:46:47.7 |
HIP 1869 |
2.28 |
| 2026-02-08 12:00 |
00:23:55.49 |
+02:49:45.6 |
HIP 1869 |
6.69 |
| 2026-02-09 00:00 |
00:24:14.81 |
+02:52:43.8 |
HIP 1869 |
12.19 |
| 2026-02-09 12:00 |
00:24:34.21 |
+02:55:42.5 |
HIP 1869 |
17.81 |
| 2026-02-10 00:00 |
00:24:53.70 |
+02:58:41.6 |
HIP 1869 |
23.49 |
| 2026-02-10 12:00 |
00:25:13.27 |
+03:01:41.0 |
HIP 1943 |
23.01 |
| 2026-02-11 00:00 |
00:25:32.92 |
+03:04:40.9 |
HIP 1943 |
23.13 |
| 2026-02-11 12:00 |
00:25:52.65 |
+03:07:41.1 |
HIP 1943 |
24.65 |
| 2026-02-12 00:00 |
00:26:12.47 |
+03:10:41.7 |
HIP 1943 |
27.34 |
| 2026-02-12 12:00 |
00:26:32.36 |
+03:13:42.6 |
HIP 2166 |
27.59 |
| 2026-02-13 00:00 |
00:26:52.33 |
+03:16:44.0 |
HIP 2166 |
28.74 |
| 2026-02-13 12:00 |
00:27:12.38 |
+03:19:45.6 |
HIP 2166 |
30.98 |
| 2026-02-14 00:00 |
00:27:32.50 |
+03:22:47.7 |
HIP 2080 |
32.79 |
| 2026-02-14 12:00 |
00:27:52.70 |
+03:25:50.1 |
HIP 2080 |
33.74 |
| 2026-02-15 00:00 |
00:28:12.98 |
+03:28:52.8 |
HIP 2080 |
35.66 |
| 2026-02-15 12:00 |
00:28:33.33 |
+03:31:55.9 |
HIP 2398 |
33.45 |
| 2026-02-16 00:00 |
00:28:53.75 |
+03:34:59.3 |
HIP 2398 |
30.85 |
| 2026-02-16 12:00 |
00:29:14.25 |
+03:38:03.0 |
HIP 2398 |
29.23 |
| 2026-02-17 00:00 |
00:29:34.82 |
+03:41:07.1 |
HIP 2398 |
28.78 |
| 2026-02-17 12:00 |
00:29:55.46 |
+03:44:11.5 |
HIP 2500 |
26.67 |
| 2026-02-18 00:00 |
00:30:16.17 |
+03:47:16.2 |
HIP 2500 |
21.56 |
| 2026-02-18 12:00 |
00:30:36.95 |
+03:50:21.2 |
HIP 2500 |
17.04 |
| 2026-02-19 00:00 |
00:30:57.80 |
+03:53:26.5 |
HIP 2500 |
13.72 |
| 2026-02-19 12:00 |
00:31:18.71 |
+03:56:32.2 |
HIP 2521 |
10.76 |
| 2026-02-20 00:00 |
00:31:39.70 |
+03:59:38.1 |
HIP 2521 |
9.04 |
| 2026-02-20 12:00 |
00:32:00.74 |
+04:02:44.3 |
HIP 2521 |
11.03 |
| 2026-02-21 00:00 |
00:32:21.86 |
+04:05:50.8 |
HIP 2521 |
15.37 |
| 2026-02-21 12:00 |
00:32:43.03 |
+04:08:57.6 |
HIP 2521 |
20.64 |
| 2026-02-22 00:00 |
00:33:04.27 |
+04:12:04.7 |
HIP 2521 |
26.30 |
| 2026-02-22 12:00 |
00:33:25.58 |
+04:15:12.0 |
HIP 2736 |
24.17 |
| 2026-02-23 00:00 |
00:33:46.94 |
+04:18:19.6 |
HIP 2736 |
18.17 |
| 2026-02-23 12:00 |
00:34:08.36 |
+04:21:27.5 |
HIP 2736 |
12.32 |
| 2026-02-24 00:00 |
00:34:29.85 |
+04:24:35.6 |
HIP 2736 |
7.08 |