C/1976 J1 (Harlan)
メタデータ
| 項目 |
値 |
| Designation |
C/1976 J1 (Harlan) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1976-11-03T03:38:09.047040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:24Z |
| Obs used |
41 |
| NEO |
- |
| M1 |
9.000 |
| K1 |
10.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1976-06-27.0000000 |
| e |
0.99974240 |
| q (au) |
1.568851 |
| a (au) |
6090.351371 |
| i (deg) |
38.805628 |
| Ω (om, deg) |
81.411634 |
| ω (w, deg) |
193.265529 |
| M (ma, deg) |
359.999732 |
等級
散乱 + 全体線形
$$
M_a = (13.852 + 2.696\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.852 |
| n |
2.696 |
| gf |
0.995 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
05:09:07.63 |
+20:48:10.1 |
HIP 23963 |
17.26 |
| 2026-02-03 12:00 |
05:09:06.67 |
+20:48:10.0 |
HIP 23963 |
17.25 |
| 2026-02-04 00:00 |
05:09:05.72 |
+20:48:10.0 |
HIP 23963 |
17.24 |
| 2026-02-04 12:00 |
05:09:04.79 |
+20:48:10.0 |
HIP 23963 |
17.23 |
| 2026-02-05 00:00 |
05:09:03.86 |
+20:48:09.9 |
HIP 23963 |
17.23 |
| 2026-02-05 12:00 |
05:09:02.95 |
+20:48:09.9 |
HIP 23963 |
17.23 |
| 2026-02-06 00:00 |
05:09:02.05 |
+20:48:10.0 |
HIP 23963 |
17.23 |
| 2026-02-06 12:00 |
05:09:01.17 |
+20:48:10.0 |
HIP 23963 |
17.24 |
| 2026-02-07 00:00 |
05:09:00.30 |
+20:48:10.1 |
HIP 23963 |
17.25 |
| 2026-02-07 12:00 |
05:08:59.44 |
+20:48:10.2 |
HIP 23963 |
17.26 |
| 2026-02-08 00:00 |
05:08:58.60 |
+20:48:10.3 |
HIP 23963 |
17.27 |
| 2026-02-08 12:00 |
05:08:57.77 |
+20:48:10.4 |
HIP 23963 |
17.29 |
| 2026-02-09 00:00 |
05:08:56.95 |
+20:48:10.6 |
HIP 23963 |
17.31 |
| 2026-02-09 12:00 |
05:08:56.15 |
+20:48:10.7 |
HIP 23963 |
17.33 |
| 2026-02-10 00:00 |
05:08:55.36 |
+20:48:10.9 |
HIP 23963 |
17.35 |
| 2026-02-10 12:00 |
05:08:54.58 |
+20:48:11.1 |
HIP 23963 |
17.37 |
| 2026-02-11 00:00 |
05:08:53.82 |
+20:48:11.3 |
HIP 23963 |
17.40 |
| 2026-02-11 12:00 |
05:08:53.07 |
+20:48:11.6 |
HIP 23963 |
17.42 |
| 2026-02-12 00:00 |
05:08:52.33 |
+20:48:11.9 |
HIP 23963 |
17.45 |
| 2026-02-12 12:00 |
05:08:51.61 |
+20:48:12.1 |
HIP 23963 |
17.48 |
| 2026-02-13 00:00 |
05:08:50.90 |
+20:48:12.5 |
HIP 23963 |
17.52 |
| 2026-02-13 12:00 |
05:08:50.21 |
+20:48:12.8 |
HIP 23963 |
17.55 |
| 2026-02-14 00:00 |
05:08:49.53 |
+20:48:13.1 |
HIP 23963 |
17.58 |
| 2026-02-14 12:00 |
05:08:48.86 |
+20:48:13.5 |
HIP 23963 |
17.62 |
| 2026-02-15 00:00 |
05:08:48.21 |
+20:48:13.9 |
HIP 23963 |
17.66 |
| 2026-02-15 12:00 |
05:08:47.58 |
+20:48:14.3 |
HIP 23963 |
17.69 |
| 2026-02-16 00:00 |
05:08:46.95 |
+20:48:14.7 |
HIP 23963 |
17.73 |
| 2026-02-16 12:00 |
05:08:46.35 |
+20:48:15.2 |
HIP 23963 |
17.77 |
| 2026-02-17 00:00 |
05:08:45.75 |
+20:48:15.6 |
HIP 23963 |
17.81 |
| 2026-02-17 12:00 |
05:08:45.17 |
+20:48:16.1 |
HIP 23963 |
17.85 |
| 2026-02-18 00:00 |
05:08:44.61 |
+20:48:16.6 |
HIP 23963 |
17.89 |
| 2026-02-18 12:00 |
05:08:44.06 |
+20:48:17.2 |
HIP 23963 |
17.93 |
| 2026-02-19 00:00 |
05:08:43.52 |
+20:48:17.7 |
HIP 23963 |
17.97 |
| 2026-02-19 12:00 |
05:08:43.00 |
+20:48:18.3 |
HIP 23963 |
18.01 |
| 2026-02-20 00:00 |
05:08:42.49 |
+20:48:18.9 |
HIP 23963 |
18.05 |
| 2026-02-20 12:00 |
05:08:42.00 |
+20:48:19.5 |
HIP 23963 |
18.09 |
| 2026-02-21 00:00 |
05:08:41.52 |
+20:48:20.1 |
HIP 23963 |
18.14 |
| 2026-02-21 12:00 |
05:08:41.06 |
+20:48:20.8 |
HIP 23963 |
18.18 |
| 2026-02-22 00:00 |
05:08:40.61 |
+20:48:21.4 |
HIP 23963 |
18.22 |
| 2026-02-22 12:00 |
05:08:40.18 |
+20:48:22.1 |
HIP 23963 |
18.26 |
| 2026-02-23 00:00 |
05:08:39.76 |
+20:48:22.8 |
HIP 23963 |
18.30 |
| 2026-02-23 12:00 |
05:08:39.36 |
+20:48:23.6 |
HIP 23963 |
18.34 |
| 2026-02-24 00:00 |
05:08:38.97 |
+20:48:24.3 |
HIP 23963 |
18.38 |