メタデータ
| 項目 |
値 |
| Designation |
C/1970 N1 (Abe) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1970-10-20T16:46:43.086720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:19Z |
| Obs used |
271 |
| NEO |
- |
| M1 |
6.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1970-10-11.0000000 |
| e |
1.00003692 |
| q (au) |
1.112541 |
| a (au) |
-30136.217151 |
| i (deg) |
126.719910 |
| Ω (om, deg) |
21.701358 |
| ω (w, deg) |
96.583364 |
| M (ma, deg) |
-0.000002 |
等級
散乱 + 全体線形
$$
M_a = (5.447 + 3.246\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.447 |
| n |
3.246 |
| gf |
0.800 |
| gb |
-0.948 |
| k |
0.999 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1970-07-05 |
1970-10-20 |
+1.2370 |
-0.055 |
| 1970-10-20 |
1971-03-07 |
-0.0609 |
-0.277 |
| 1971-03-07 |
1971-05-25 |
+5.0362 |
-1.623 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
07:28:47.20 |
-31:58:50.2 |
HIP 36345 |
7.98 |
| 2026-03-26 12:00 |
07:28:46.70 |
-31:58:32.4 |
HIP 36345 |
7.69 |
| 2026-03-27 00:00 |
07:28:46.20 |
-31:58:14.6 |
HIP 36345 |
7.41 |
| 2026-03-27 12:00 |
07:28:45.72 |
-31:57:56.8 |
HIP 36345 |
7.14 |
| 2026-03-28 00:00 |
07:28:45.26 |
-31:57:38.9 |
HIP 36345 |
6.86 |
| 2026-03-28 12:00 |
07:28:44.80 |
-31:57:21.1 |
HIP 36345 |
6.59 |
| 2026-03-29 00:00 |
07:28:44.37 |
-31:57:03.2 |
HIP 36345 |
6.32 |
| 2026-03-29 12:00 |
07:28:43.95 |
-31:56:45.3 |
HIP 36345 |
6.05 |
| 2026-03-30 00:00 |
07:28:43.54 |
-31:56:27.4 |
HIP 36345 |
5.78 |
| 2026-03-30 12:00 |
07:28:43.15 |
-31:56:09.5 |
HIP 36345 |
5.52 |
| 2026-03-31 00:00 |
07:28:42.77 |
-31:55:51.6 |
HIP 36345 |
5.27 |
| 2026-03-31 12:00 |
07:28:42.40 |
-31:55:33.7 |
HIP 36345 |
5.01 |
| 2026-04-01 00:00 |
07:28:42.05 |
-31:55:15.7 |
HIP 36345 |
4.77 |
| 2026-04-01 12:00 |
07:28:41.72 |
-31:54:57.8 |
HIP 36345 |
4.53 |
| 2026-04-02 00:00 |
07:28:41.40 |
-31:54:39.8 |
HIP 36345 |
4.29 |
| 2026-04-02 12:00 |
07:28:41.09 |
-31:54:21.9 |
HIP 36345 |
4.07 |
| 2026-04-03 00:00 |
07:28:40.80 |
-31:54:03.9 |
HIP 36345 |
3.85 |
| 2026-04-03 12:00 |
07:28:40.53 |
-31:53:46.0 |
HIP 36345 |
3.64 |
| 2026-04-04 00:00 |
07:28:40.27 |
-31:53:28.0 |
HIP 36345 |
3.45 |
| 2026-04-04 12:00 |
07:28:40.02 |
-31:53:10.1 |
HIP 36345 |
3.27 |
| 2026-04-05 00:00 |
07:28:39.79 |
-31:52:52.1 |
HIP 36345 |
3.11 |
| 2026-04-05 12:00 |
07:28:39.57 |
-31:52:34.2 |
HIP 36345 |
2.97 |
| 2026-04-06 00:00 |
07:28:39.37 |
-31:52:16.3 |
HIP 36345 |
2.85 |
| 2026-04-06 12:00 |
07:28:39.18 |
-31:51:58.3 |
HIP 36345 |
2.76 |
| 2026-04-07 00:00 |
07:28:39.01 |
-31:51:40.4 |
HIP 36345 |
2.69 |
| 2026-04-07 12:00 |
07:28:38.85 |
-31:51:22.5 |
HIP 36345 |
2.66 |
| 2026-04-08 00:00 |
07:28:38.70 |
-31:51:04.6 |
HIP 36345 |
2.65 |
| 2026-04-08 12:00 |
07:28:38.57 |
-31:50:46.7 |
HIP 36345 |
2.68 |
| 2026-04-09 00:00 |
07:28:38.46 |
-31:50:28.8 |
HIP 36345 |
2.73 |
| 2026-04-09 12:00 |
07:28:38.36 |
-31:50:11.0 |
HIP 36345 |
2.81 |
| 2026-04-10 00:00 |
07:28:38.27 |
-31:49:53.1 |
HIP 36345 |
2.92 |
| 2026-04-10 12:00 |
07:28:38.20 |
-31:49:35.3 |
HIP 36345 |
3.05 |
| 2026-04-11 00:00 |
07:28:38.15 |
-31:49:17.5 |
HIP 36345 |
3.20 |
| 2026-04-11 12:00 |
07:28:38.10 |
-31:48:59.7 |
HIP 36345 |
3.37 |
| 2026-04-12 00:00 |
07:28:38.08 |
-31:48:41.9 |
HIP 36345 |
3.55 |
| 2026-04-12 12:00 |
07:28:38.07 |
-31:48:24.2 |
HIP 36345 |
3.74 |
| 2026-04-13 00:00 |
07:28:38.07 |
-31:48:06.4 |
HIP 36345 |
3.94 |
| 2026-04-13 12:00 |
07:28:38.09 |
-31:47:48.7 |
HIP 36345 |
4.16 |
| 2026-04-14 00:00 |
07:28:38.12 |
-31:47:31.0 |
HIP 36345 |
4.38 |
| 2026-04-14 12:00 |
07:28:38.16 |
-31:47:13.4 |
HIP 36345 |
4.60 |
| 2026-04-15 00:00 |
07:28:38.23 |
-31:46:55.8 |
HIP 36345 |
4.83 |
| 2026-04-15 12:00 |
07:28:38.30 |
-31:46:38.2 |
HIP 36345 |
5.07 |
| 2026-04-16 00:00 |
07:28:38.39 |
-31:46:20.6 |
HIP 36345 |
5.31 |