メタデータ
| 項目 |
値 |
| Designation |
C/1933 D1 (Peltier) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1933-02-06T16:43:23.779200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:05Z |
| Obs used |
14 |
| NEO |
- |
| M1 |
11.300 |
| K1 |
12.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1933-03-01.0000000 |
| e |
0.99999873 |
| q (au) |
1.000679 |
| a (au) |
787220.711133 |
| i (deg) |
86.680374 |
| Ω (om, deg) |
312.466777 |
| ω (w, deg) |
135.984212 |
| M (ma, deg) |
0.000000 |
等級
散乱 + 全体線形
$$
M_a = (10.760 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.760 |
| 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 |
23:01:09.42 |
-67:57:47.5 |
HIP 113497 |
18.50 |
| 2026-03-26 12:00 |
23:01:11.80 |
-67:57:49.5 |
HIP 113497 |
18.61 |
| 2026-03-27 00:00 |
23:01:14.17 |
-67:57:51.5 |
HIP 113497 |
18.72 |
| 2026-03-27 12:00 |
23:01:16.53 |
-67:57:53.7 |
HIP 113497 |
18.83 |
| 2026-03-28 00:00 |
23:01:18.88 |
-67:57:56.0 |
HIP 113497 |
18.94 |
| 2026-03-28 12:00 |
23:01:21.23 |
-67:57:58.4 |
HIP 113497 |
19.05 |
| 2026-03-29 00:00 |
23:01:23.56 |
-67:58:01.0 |
HIP 113497 |
19.16 |
| 2026-03-29 12:00 |
23:01:25.89 |
-67:58:03.6 |
HIP 113964 |
19.25 |
| 2026-03-30 00:00 |
23:01:28.21 |
-67:58:06.4 |
HIP 113964 |
19.04 |
| 2026-03-30 12:00 |
23:01:30.52 |
-67:58:09.3 |
HIP 113964 |
18.84 |
| 2026-03-31 00:00 |
23:01:32.82 |
-67:58:12.3 |
HIP 113964 |
18.64 |
| 2026-03-31 12:00 |
23:01:35.11 |
-67:58:15.4 |
HIP 113964 |
18.44 |
| 2026-04-01 00:00 |
23:01:37.39 |
-67:58:18.6 |
HIP 113964 |
18.24 |
| 2026-04-01 12:00 |
23:01:39.66 |
-67:58:21.9 |
HIP 113964 |
18.05 |
| 2026-04-02 00:00 |
23:01:41.93 |
-67:58:25.4 |
HIP 113964 |
17.85 |
| 2026-04-02 12:00 |
23:01:44.18 |
-67:58:28.9 |
HIP 113964 |
17.66 |
| 2026-04-03 00:00 |
23:01:46.42 |
-67:58:32.6 |
HIP 113964 |
17.47 |
| 2026-04-03 12:00 |
23:01:48.65 |
-67:58:36.4 |
HIP 113964 |
17.29 |
| 2026-04-04 00:00 |
23:01:50.88 |
-67:58:40.3 |
HIP 113964 |
17.10 |
| 2026-04-04 12:00 |
23:01:53.09 |
-67:58:44.3 |
HIP 113964 |
16.92 |
| 2026-04-05 00:00 |
23:01:55.29 |
-67:58:48.5 |
HIP 113964 |
16.74 |
| 2026-04-05 12:00 |
23:01:57.48 |
-67:58:52.7 |
HIP 113964 |
16.56 |
| 2026-04-06 00:00 |
23:01:59.66 |
-67:58:57.0 |
HIP 113964 |
16.38 |
| 2026-04-06 12:00 |
23:02:01.83 |
-67:59:01.5 |
HIP 113964 |
16.21 |
| 2026-04-07 00:00 |
23:02:03.99 |
-67:59:06.1 |
HIP 113964 |
16.04 |
| 2026-04-07 12:00 |
23:02:06.13 |
-67:59:10.8 |
HIP 113964 |
15.87 |
| 2026-04-08 00:00 |
23:02:08.27 |
-67:59:15.6 |
HIP 113964 |
15.71 |
| 2026-04-08 12:00 |
23:02:10.39 |
-67:59:20.5 |
HIP 113964 |
15.55 |
| 2026-04-09 00:00 |
23:02:12.50 |
-67:59:25.5 |
HIP 113964 |
15.39 |
| 2026-04-09 12:00 |
23:02:14.60 |
-67:59:30.6 |
HIP 113964 |
15.23 |
| 2026-04-10 00:00 |
23:02:16.69 |
-67:59:35.8 |
HIP 113964 |
15.08 |
| 2026-04-10 12:00 |
23:02:18.76 |
-67:59:41.2 |
HIP 113964 |
14.93 |
| 2026-04-11 00:00 |
23:02:20.82 |
-67:59:46.6 |
HIP 113964 |
14.78 |
| 2026-04-11 12:00 |
23:02:22.87 |
-67:59:52.2 |
HIP 113964 |
14.64 |
| 2026-04-12 00:00 |
23:02:24.91 |
-67:59:57.9 |
HIP 113964 |
14.50 |
| 2026-04-12 12:00 |
23:02:26.94 |
-68:00:03.6 |
HIP 113964 |
14.37 |
| 2026-04-13 00:00 |
23:02:28.95 |
-68:00:09.5 |
HIP 113964 |
14.24 |
| 2026-04-13 12:00 |
23:02:30.95 |
-68:00:15.5 |
HIP 113964 |
14.11 |
| 2026-04-14 00:00 |
23:02:32.93 |
-68:00:21.6 |
HIP 113964 |
13.98 |
| 2026-04-14 12:00 |
23:02:34.90 |
-68:00:27.8 |
HIP 113964 |
13.86 |
| 2026-04-15 00:00 |
23:02:36.86 |
-68:00:34.1 |
HIP 113964 |
13.75 |
| 2026-04-15 12:00 |
23:02:38.81 |
-68:00:40.5 |
HIP 113964 |
13.64 |
| 2026-04-16 00:00 |
23:02:40.74 |
-68:00:47.0 |
HIP 113964 |
13.53 |