메타데이터
| 항목 |
값 |
| Designation |
C/1906 E1 (Kopff) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1905-10-18T07:17:39.871680Z |
| Orbit solution date (soln_date, UTC) |
2024-02-20T20:16:47Z |
| Obs used |
124 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1906-04-15.0000000 |
| e |
1.00192424 |
| q (au) |
3.340132 |
| a (au) |
-1735.821106 |
| i (deg) |
4.282821 |
| Ω (om, deg) |
343.624176 |
| ω (w, deg) |
158.608146 |
| M (ma, deg) |
0.002435 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
20:27:47.79 |
-21:57:10.4 |
HIP 100951 |
5.86 |
| 2026-07-29 12:00 |
20:27:46.90 |
-21:57:13.4 |
HIP 100951 |
5.97 |
| 2026-07-30 00:00 |
20:27:46.01 |
-21:57:16.4 |
HIP 100951 |
6.08 |
| 2026-07-30 12:00 |
20:27:45.12 |
-21:57:19.4 |
HIP 100951 |
6.20 |
| 2026-07-31 00:00 |
20:27:44.23 |
-21:57:22.4 |
HIP 100951 |
6.33 |
| 2026-07-31 12:00 |
20:27:43.34 |
-21:57:25.4 |
HIP 100951 |
6.46 |
| 2026-08-01 00:00 |
20:27:42.45 |
-21:57:28.4 |
HIP 100879 |
6.45 |
| 2026-08-01 12:00 |
20:27:41.56 |
-21:57:31.4 |
HIP 100879 |
6.23 |
| 2026-08-02 00:00 |
20:27:40.67 |
-21:57:34.3 |
HIP 100879 |
6.02 |
| 2026-08-02 12:00 |
20:27:39.79 |
-21:57:37.3 |
HIP 100879 |
5.81 |
| 2026-08-03 00:00 |
20:27:38.90 |
-21:57:40.2 |
HIP 100879 |
5.60 |
| 2026-08-03 12:00 |
20:27:38.01 |
-21:57:43.2 |
HIP 100879 |
5.39 |
| 2026-08-04 00:00 |
20:27:37.13 |
-21:57:46.1 |
HIP 100879 |
5.18 |
| 2026-08-04 12:00 |
20:27:36.24 |
-21:57:49.0 |
HIP 100879 |
4.97 |
| 2026-08-05 00:00 |
20:27:35.36 |
-21:57:52.0 |
HIP 100879 |
4.76 |
| 2026-08-05 12:00 |
20:27:34.48 |
-21:57:54.9 |
HIP 100879 |
4.55 |
| 2026-08-06 00:00 |
20:27:33.60 |
-21:57:57.8 |
HIP 100879 |
4.34 |
| 2026-08-06 12:00 |
20:27:32.72 |
-21:58:00.6 |
HIP 100879 |
4.13 |
| 2026-08-07 00:00 |
20:27:31.84 |
-21:58:03.5 |
HIP 100879 |
3.92 |
| 2026-08-07 12:00 |
20:27:30.96 |
-21:58:06.4 |
HIP 100879 |
3.71 |
| 2026-08-08 00:00 |
20:27:30.08 |
-21:58:09.2 |
HIP 100879 |
3.50 |
| 2026-08-08 12:00 |
20:27:29.21 |
-21:58:12.1 |
HIP 100879 |
3.29 |
| 2026-08-09 00:00 |
20:27:28.33 |
-21:58:14.9 |
HIP 100879 |
3.08 |
| 2026-08-09 12:00 |
20:27:27.46 |
-21:58:17.7 |
HIP 100879 |
2.88 |
| 2026-08-10 00:00 |
20:27:26.59 |
-21:58:20.6 |
HIP 100879 |
2.67 |
| 2026-08-10 12:00 |
20:27:25.72 |
-21:58:23.4 |
HIP 100879 |
2.46 |
| 2026-08-11 00:00 |
20:27:24.86 |
-21:58:26.1 |
HIP 100879 |
2.26 |
| 2026-08-11 12:00 |
20:27:23.99 |
-21:58:28.9 |
HIP 100879 |
2.05 |
| 2026-08-12 00:00 |
20:27:23.13 |
-21:58:31.7 |
HIP 100879 |
1.85 |
| 2026-08-12 12:00 |
20:27:22.27 |
-21:58:34.4 |
HIP 100879 |
1.64 |
| 2026-08-13 00:00 |
20:27:21.41 |
-21:58:37.2 |
HIP 100879 |
1.44 |
| 2026-08-13 12:00 |
20:27:20.55 |
-21:58:39.9 |
HIP 100879 |
1.24 |
| 2026-08-14 00:00 |
20:27:19.69 |
-21:58:42.6 |
HIP 100879 |
1.04 |
| 2026-08-14 12:00 |
20:27:18.84 |
-21:58:45.3 |
HIP 100879 |
0.84 |
| 2026-08-15 00:00 |
20:27:17.99 |
-21:58:48.0 |
HIP 100879 |
0.64 |
| 2026-08-15 12:00 |
20:27:17.14 |
-21:58:50.7 |
HIP 100879 |
0.44 |
| 2026-08-16 00:00 |
20:27:16.30 |
-21:58:53.4 |
HIP 100879 |
0.26 |
| 2026-08-16 12:00 |
20:27:15.45 |
-21:58:56.0 |
HIP 100879 |
0.15 |
| 2026-08-17 00:00 |
20:27:14.61 |
-21:58:58.6 |
HIP 100879 |
0.24 |
| 2026-08-17 12:00 |
20:27:13.78 |
-21:59:01.2 |
HIP 100879 |
0.41 |
| 2026-08-18 00:00 |
20:27:12.94 |
-21:59:03.8 |
HIP 100879 |
0.60 |
| 2026-08-18 12:00 |
20:27:12.11 |
-21:59:06.4 |
HIP 100879 |
0.79 |
| 2026-08-19 00:00 |
20:27:11.28 |
-21:59:09.0 |
HIP 100879 |
0.99 |