メタデータ
| 項目 |
値 |
| Designation |
C/2000 D2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2000-03-08T14:43:54.082560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:04Z |
| Obs used |
79 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2000-03-01.0000000 |
| e |
0.86703438 |
| q (au) |
2.297610 |
| a (au) |
17.279730 |
| i (deg) |
156.991926 |
| Ω (om, deg) |
235.887153 |
| ω (w, deg) |
117.682679 |
| M (ma, deg) |
359.895528 |
等級
散乱 + 全体線形
$$
M_a = (18.087 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.087 |
| n |
2.000 |
| gf |
1.000 |
| 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) |
| 2026-03-26 00:00 |
20:59:08.37 |
-39:11:53.4 |
HIP 103504 |
13.71 |
| 2026-03-26 12:00 |
20:59:10.94 |
-39:12:01.9 |
HIP 103504 |
14.19 |
| 2026-03-27 00:00 |
20:59:13.48 |
-39:12:10.6 |
HIP 103504 |
14.67 |
| 2026-03-27 12:00 |
20:59:15.99 |
-39:12:19.5 |
HIP 103504 |
15.15 |
| 2026-03-28 00:00 |
20:59:18.46 |
-39:12:28.7 |
HIP 103504 |
15.62 |
| 2026-03-28 12:00 |
20:59:20.91 |
-39:12:38.0 |
HIP 103504 |
16.10 |
| 2026-03-29 00:00 |
20:59:23.32 |
-39:12:47.6 |
HIP 103504 |
16.57 |
| 2026-03-29 12:00 |
20:59:25.70 |
-39:12:57.4 |
HIP 103504 |
17.05 |
| 2026-03-30 00:00 |
20:59:28.05 |
-39:13:07.3 |
HIP 103504 |
17.52 |
| 2026-03-30 12:00 |
20:59:30.37 |
-39:13:17.5 |
HIP 103504 |
17.98 |
| 2026-03-31 00:00 |
20:59:32.65 |
-39:13:27.9 |
HIP 103504 |
18.45 |
| 2026-03-31 12:00 |
20:59:34.90 |
-39:13:38.5 |
HIP 103504 |
18.91 |
| 2026-04-01 00:00 |
20:59:37.11 |
-39:13:49.3 |
HIP 103504 |
19.37 |
| 2026-04-01 12:00 |
20:59:39.30 |
-39:14:00.4 |
HIP 103504 |
19.82 |
| 2026-04-02 00:00 |
20:59:41.45 |
-39:14:11.6 |
HIP 103504 |
20.27 |
| 2026-04-02 12:00 |
20:59:43.56 |
-39:14:23.0 |
HIP 103504 |
20.72 |
| 2026-04-03 00:00 |
20:59:45.64 |
-39:14:34.7 |
HIP 103504 |
21.16 |
| 2026-04-03 12:00 |
20:59:47.69 |
-39:14:46.5 |
HIP 103504 |
21.61 |
| 2026-04-04 00:00 |
20:59:49.71 |
-39:14:58.6 |
HIP 103504 |
22.04 |
| 2026-04-04 12:00 |
20:59:51.69 |
-39:15:10.8 |
HIP 103504 |
22.48 |
| 2026-04-05 00:00 |
20:59:53.63 |
-39:15:23.3 |
HIP 103504 |
22.90 |
| 2026-04-05 12:00 |
20:59:55.54 |
-39:15:35.9 |
HIP 103504 |
23.33 |
| 2026-04-06 00:00 |
20:59:57.42 |
-39:15:48.8 |
HIP 103504 |
23.75 |
| 2026-04-06 12:00 |
20:59:59.26 |
-39:16:01.8 |
HIP 103504 |
24.17 |
| 2026-04-07 00:00 |
21:00:01.06 |
-39:16:15.1 |
HIP 103504 |
24.58 |
| 2026-04-07 12:00 |
21:00:02.83 |
-39:16:28.6 |
HIP 103504 |
24.99 |
| 2026-04-08 00:00 |
21:00:04.56 |
-39:16:42.2 |
HIP 103504 |
25.40 |
| 2026-04-08 12:00 |
21:00:06.26 |
-39:16:56.1 |
HIP 103504 |
25.80 |
| 2026-04-09 00:00 |
21:00:07.92 |
-39:17:10.1 |
HIP 103504 |
26.19 |
| 2026-04-09 12:00 |
21:00:09.55 |
-39:17:24.4 |
HIP 103504 |
26.59 |
| 2026-04-10 00:00 |
21:00:11.14 |
-39:17:38.8 |
HIP 103504 |
26.98 |
| 2026-04-10 12:00 |
21:00:12.69 |
-39:17:53.5 |
HIP 103504 |
27.36 |
| 2026-04-11 00:00 |
21:00:14.21 |
-39:18:08.3 |
HIP 103504 |
27.74 |
| 2026-04-11 12:00 |
21:00:15.69 |
-39:18:23.4 |
HIP 103857 |
28.01 |
| 2026-04-12 00:00 |
21:00:17.13 |
-39:18:38.6 |
HIP 103857 |
27.74 |
| 2026-04-12 12:00 |
21:00:18.53 |
-39:18:54.0 |
HIP 103857 |
27.49 |
| 2026-04-13 00:00 |
21:00:19.90 |
-39:19:09.6 |
HIP 103857 |
27.25 |
| 2026-04-13 12:00 |
21:00:21.23 |
-39:19:25.5 |
HIP 103857 |
27.01 |
| 2026-04-14 00:00 |
21:00:22.53 |
-39:19:41.5 |
HIP 103857 |
26.79 |
| 2026-04-14 12:00 |
21:00:23.78 |
-39:19:57.6 |
HIP 103857 |
26.58 |
| 2026-04-15 00:00 |
21:00:25.00 |
-39:20:14.0 |
HIP 103857 |
26.38 |
| 2026-04-15 12:00 |
21:00:26.18 |
-39:20:30.6 |
HIP 103857 |
26.19 |
| 2026-04-16 00:00 |
21:00:27.32 |
-39:20:47.3 |
HIP 103857 |
26.01 |