メタデータ
| 項目 |
値 |
| Designation |
C/1995 Q2 (Hartley-Drinkwater) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1995-08-02T17:27:23.549760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
22.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1995-09-06.0000000 |
| e |
0.96649288 |
| q (au) |
1.889143 |
| a (au) |
56.380355 |
| i (deg) |
168.007513 |
| Ω (om, deg) |
300.750783 |
| ω (w, deg) |
314.000279 |
| M (ma, deg) |
0.079792 |
等級
散乱 + 全体線形
$$
M_a = (13.335 + 4.533\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.335 |
| n |
4.533 |
| gf |
1.000 |
| gb |
-0.557 |
| k |
0.869 |
| δ90 |
9.998 |
| 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 |
12:29:38.61 |
+08:12:12.6 |
HIP 60910 |
16.72 |
| 2026-09-20 12:00 |
12:29:40.71 |
+08:11:58.1 |
HIP 60910 |
17.23 |
| 2026-09-21 00:00 |
12:29:42.81 |
+08:11:43.6 |
HIP 60910 |
17.74 |
| 2026-09-21 12:00 |
12:29:44.92 |
+08:11:29.2 |
HIP 60910 |
18.26 |
| 2026-09-22 00:00 |
12:29:47.03 |
+08:11:14.8 |
HIP 60910 |
18.77 |
| 2026-09-22 12:00 |
12:29:49.15 |
+08:11:00.5 |
HIP 60910 |
19.30 |
| 2026-09-23 00:00 |
12:29:51.27 |
+08:10:46.2 |
HIP 60910 |
19.82 |
| 2026-09-23 12:00 |
12:29:53.39 |
+08:10:31.9 |
HIP 60910 |
20.35 |
| 2026-09-24 00:00 |
12:29:55.51 |
+08:10:17.7 |
HIP 60910 |
20.88 |
| 2026-09-24 12:00 |
12:29:57.63 |
+08:10:03.6 |
HIP 60910 |
21.41 |
| 2026-09-25 00:00 |
12:29:59.76 |
+08:09:49.4 |
HIP 60910 |
21.95 |
| 2026-09-25 12:00 |
12:30:01.89 |
+08:09:35.4 |
HIP 60910 |
22.48 |
| 2026-09-26 00:00 |
12:30:04.02 |
+08:09:21.4 |
HIP 60910 |
23.02 |
| 2026-09-26 12:00 |
12:30:06.15 |
+08:09:07.4 |
HIP 60910 |
23.56 |
| 2026-09-27 00:00 |
12:30:08.28 |
+08:08:53.5 |
HIP 60910 |
24.10 |
| 2026-09-27 12:00 |
12:30:10.42 |
+08:08:39.6 |
HIP 60910 |
24.64 |
| 2026-09-28 00:00 |
12:30:12.55 |
+08:08:25.8 |
HIP 60910 |
25.19 |
| 2026-09-28 12:00 |
12:30:14.69 |
+08:08:12.0 |
HIP 60910 |
25.73 |
| 2026-09-29 00:00 |
12:30:16.83 |
+08:07:58.3 |
HIP 60910 |
26.27 |
| 2026-09-29 12:00 |
12:30:18.97 |
+08:07:44.6 |
HIP 60910 |
26.82 |
| 2026-09-30 00:00 |
12:30:21.11 |
+08:07:31.0 |
HIP 60910 |
27.37 |
| 2026-09-30 12:00 |
12:30:23.25 |
+08:07:17.5 |
HIP 60910 |
27.92 |
| 2026-10-01 00:00 |
12:30:25.39 |
+08:07:04.0 |
HIP 60910 |
28.46 |
| 2026-10-01 12:00 |
12:30:27.53 |
+08:06:50.6 |
HIP 60910 |
29.01 |
| 2026-10-02 00:00 |
12:30:29.67 |
+08:06:37.2 |
HIP 60910 |
29.56 |
| 2026-10-02 12:00 |
12:30:31.81 |
+08:06:23.9 |
HIP 60910 |
30.11 |
| 2026-10-03 00:00 |
12:30:33.95 |
+08:06:10.6 |
HIP 60910 |
30.66 |
| 2026-10-03 12:00 |
12:30:36.09 |
+08:05:57.4 |
HIP 60910 |
31.21 |
| 2026-10-04 00:00 |
12:30:38.23 |
+08:05:44.3 |
HIP 61103 |
31.36 |
| 2026-10-04 12:00 |
12:30:40.37 |
+08:05:31.3 |
HIP 61103 |
30.98 |
| 2026-10-05 00:00 |
12:30:42.51 |
+08:05:18.3 |
HIP 61103 |
30.60 |
| 2026-10-05 12:00 |
12:30:44.65 |
+08:05:05.3 |
HIP 61103 |
30.24 |
| 2026-10-06 00:00 |
12:30:46.79 |
+08:04:52.5 |
HIP 61103 |
29.88 |
| 2026-10-06 12:00 |
12:30:48.92 |
+08:04:39.7 |
HIP 61103 |
29.52 |
| 2026-10-07 00:00 |
12:30:51.06 |
+08:04:27.0 |
HIP 61103 |
29.18 |
| 2026-10-07 12:00 |
12:30:53.19 |
+08:04:14.3 |
HIP 61103 |
28.84 |
| 2026-10-08 00:00 |
12:30:55.32 |
+08:04:01.7 |
HIP 61103 |
28.51 |
| 2026-10-08 12:00 |
12:30:57.45 |
+08:03:49.2 |
HIP 61103 |
28.20 |
| 2026-10-09 00:00 |
12:30:59.58 |
+08:03:36.8 |
HIP 61103 |
27.89 |
| 2026-10-09 12:00 |
12:31:01.70 |
+08:03:24.4 |
HIP 61103 |
27.59 |
| 2026-10-10 00:00 |
12:31:03.82 |
+08:03:12.1 |
HIP 61103 |
27.30 |
| 2026-10-10 12:00 |
12:31:05.94 |
+08:03:00.0 |
HIP 61103 |
27.02 |
| 2026-10-11 00:00 |
12:31:08.06 |
+08:02:47.8 |
HIP 61103 |
26.75 |