メタデータ
| 項目 |
値 |
| Designation |
C/1968 Q2 (Honda) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1968-11-03T20:03:50.408640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
35 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
33.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1968-10-22.0000000 |
| e |
1.00000000 |
| q (au) |
1.099008 |
| a (au) |
- |
| i (deg) |
127.912524 |
| Ω (om, deg) |
253.292861 |
| ω (w, deg) |
282.803926 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (7.086 + 3.394\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.086 |
| n |
3.394 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-07-29 00:00 |
12:55:06.79 |
+52:14:07.1 |
HIP 63255 |
25.40 |
| 2026-07-29 12:00 |
12:55:07.53 |
+52:13:49.1 |
HIP 63255 |
25.40 |
| 2026-07-30 00:00 |
12:55:08.28 |
+52:13:31.1 |
HIP 63255 |
25.41 |
| 2026-07-30 12:00 |
12:55:09.05 |
+52:13:13.2 |
HIP 63255 |
25.41 |
| 2026-07-31 00:00 |
12:55:09.83 |
+52:12:55.2 |
HIP 63255 |
25.42 |
| 2026-07-31 12:00 |
12:55:10.63 |
+52:12:37.3 |
HIP 63255 |
25.42 |
| 2026-08-01 00:00 |
12:55:11.45 |
+52:12:19.5 |
HIP 63255 |
25.43 |
| 2026-08-01 12:00 |
12:55:12.28 |
+52:12:01.6 |
HIP 63255 |
25.44 |
| 2026-08-02 00:00 |
12:55:13.13 |
+52:11:43.8 |
HIP 63255 |
25.45 |
| 2026-08-02 12:00 |
12:55:14.00 |
+52:11:26.1 |
HIP 63255 |
25.47 |
| 2026-08-03 00:00 |
12:55:14.88 |
+52:11:08.3 |
HIP 63255 |
25.48 |
| 2026-08-03 12:00 |
12:55:15.78 |
+52:10:50.6 |
HIP 63255 |
25.50 |
| 2026-08-04 00:00 |
12:55:16.69 |
+52:10:32.9 |
HIP 63255 |
25.52 |
| 2026-08-04 12:00 |
12:55:17.62 |
+52:10:15.3 |
HIP 63255 |
25.54 |
| 2026-08-05 00:00 |
12:55:18.56 |
+52:09:57.7 |
HIP 63000 |
25.53 |
| 2026-08-05 12:00 |
12:55:19.52 |
+52:09:40.1 |
HIP 63000 |
25.29 |
| 2026-08-06 00:00 |
12:55:20.50 |
+52:09:22.5 |
HIP 63000 |
25.05 |
| 2026-08-06 12:00 |
12:55:21.49 |
+52:09:05.1 |
HIP 63000 |
24.82 |
| 2026-08-07 00:00 |
12:55:22.49 |
+52:08:47.6 |
HIP 63000 |
24.59 |
| 2026-08-07 12:00 |
12:55:23.52 |
+52:08:30.2 |
HIP 63000 |
24.36 |
| 2026-08-08 00:00 |
12:55:24.55 |
+52:08:12.8 |
HIP 63000 |
24.13 |
| 2026-08-08 12:00 |
12:55:25.60 |
+52:07:55.5 |
HIP 63000 |
23.91 |
| 2026-08-09 00:00 |
12:55:26.67 |
+52:07:38.2 |
HIP 63000 |
23.70 |
| 2026-08-09 12:00 |
12:55:27.75 |
+52:07:21.0 |
HIP 63000 |
23.49 |
| 2026-08-10 00:00 |
12:55:28.85 |
+52:07:03.8 |
HIP 63000 |
23.28 |
| 2026-08-10 12:00 |
12:55:29.96 |
+52:06:46.7 |
HIP 63000 |
23.07 |
| 2026-08-11 00:00 |
12:55:31.09 |
+52:06:29.6 |
HIP 63000 |
22.88 |
| 2026-08-11 12:00 |
12:55:32.23 |
+52:06:12.6 |
HIP 63000 |
22.68 |
| 2026-08-12 00:00 |
12:55:33.39 |
+52:05:55.6 |
HIP 63000 |
22.49 |
| 2026-08-12 12:00 |
12:55:34.56 |
+52:05:38.7 |
HIP 63000 |
22.31 |
| 2026-08-13 00:00 |
12:55:35.75 |
+52:05:21.8 |
HIP 63000 |
22.13 |
| 2026-08-13 12:00 |
12:55:36.95 |
+52:05:05.0 |
HIP 63000 |
21.96 |
| 2026-08-14 00:00 |
12:55:38.17 |
+52:04:48.2 |
HIP 63000 |
21.79 |
| 2026-08-14 12:00 |
12:55:39.39 |
+52:04:31.5 |
HIP 63000 |
21.63 |
| 2026-08-15 00:00 |
12:55:40.64 |
+52:04:14.9 |
HIP 63000 |
21.48 |
| 2026-08-15 12:00 |
12:55:41.90 |
+52:03:58.4 |
HIP 63000 |
21.33 |
| 2026-08-16 00:00 |
12:55:43.17 |
+52:03:41.9 |
HIP 63000 |
21.19 |
| 2026-08-16 12:00 |
12:55:44.45 |
+52:03:25.4 |
HIP 63000 |
21.05 |
| 2026-08-17 00:00 |
12:55:45.75 |
+52:03:09.1 |
HIP 63000 |
20.92 |
| 2026-08-17 12:00 |
12:55:47.06 |
+52:02:52.8 |
HIP 63000 |
20.80 |
| 2026-08-18 00:00 |
12:55:48.39 |
+52:02:36.5 |
HIP 63000 |
20.69 |
| 2026-08-18 12:00 |
12:55:49.73 |
+52:02:20.4 |
HIP 63000 |
20.58 |
| 2026-08-19 00:00 |
12:55:51.08 |
+52:02:04.3 |
HIP 63000 |
20.48 |