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) |
| 2026-03-26 00:00 |
20:29:17.43 |
-21:50:11.9 |
HIP 100951 |
20.13 |
| 2026-03-26 12:00 |
20:29:17.91 |
-21:50:10.7 |
HIP 100951 |
20.23 |
| 2026-03-27 00:00 |
20:29:18.39 |
-21:50:09.6 |
HIP 100951 |
20.34 |
| 2026-03-27 12:00 |
20:29:18.86 |
-21:50:08.6 |
HIP 100951 |
20.44 |
| 2026-03-28 00:00 |
20:29:19.32 |
-21:50:07.5 |
HIP 100951 |
20.54 |
| 2026-03-28 12:00 |
20:29:19.78 |
-21:50:06.5 |
HIP 100951 |
20.63 |
| 2026-03-29 00:00 |
20:29:20.23 |
-21:50:05.5 |
HIP 100951 |
20.73 |
| 2026-03-29 12:00 |
20:29:20.67 |
-21:50:04.5 |
HIP 100951 |
20.82 |
| 2026-03-30 00:00 |
20:29:21.10 |
-21:50:03.6 |
HIP 100951 |
20.92 |
| 2026-03-30 12:00 |
20:29:21.53 |
-21:50:02.7 |
HIP 100951 |
21.01 |
| 2026-03-31 00:00 |
20:29:21.95 |
-21:50:01.8 |
HIP 100951 |
21.10 |
| 2026-03-31 12:00 |
20:29:22.36 |
-21:50:00.9 |
HIP 100951 |
21.19 |
| 2026-04-01 00:00 |
20:29:22.77 |
-21:50:00.1 |
HIP 100951 |
21.28 |
| 2026-04-01 12:00 |
20:29:23.17 |
-21:49:59.3 |
HIP 100951 |
21.36 |
| 2026-04-02 00:00 |
20:29:23.56 |
-21:49:58.5 |
HIP 100951 |
21.44 |
| 2026-04-02 12:00 |
20:29:23.95 |
-21:49:57.7 |
HIP 100951 |
21.53 |
| 2026-04-03 00:00 |
20:29:24.32 |
-21:49:57.0 |
HIP 100951 |
21.61 |
| 2026-04-03 12:00 |
20:29:24.70 |
-21:49:56.3 |
HIP 100951 |
21.69 |
| 2026-04-04 00:00 |
20:29:25.06 |
-21:49:55.6 |
HIP 100951 |
21.76 |
| 2026-04-04 12:00 |
20:29:25.41 |
-21:49:55.0 |
HIP 100951 |
21.84 |
| 2026-04-05 00:00 |
20:29:25.76 |
-21:49:54.3 |
HIP 100951 |
21.91 |
| 2026-04-05 12:00 |
20:29:26.11 |
-21:49:53.7 |
HIP 100951 |
21.99 |
| 2026-04-06 00:00 |
20:29:26.44 |
-21:49:53.2 |
HIP 100951 |
22.06 |
| 2026-04-06 12:00 |
20:29:26.77 |
-21:49:52.6 |
HIP 100951 |
22.13 |
| 2026-04-07 00:00 |
20:29:27.09 |
-21:49:52.1 |
HIP 100951 |
22.20 |
| 2026-04-07 12:00 |
20:29:27.40 |
-21:49:51.6 |
HIP 100951 |
22.26 |
| 2026-04-08 00:00 |
20:29:27.70 |
-21:49:51.2 |
HIP 100951 |
22.33 |
| 2026-04-08 12:00 |
20:29:28.00 |
-21:49:50.8 |
HIP 100951 |
22.39 |
| 2026-04-09 00:00 |
20:29:28.29 |
-21:49:50.4 |
HIP 100951 |
22.45 |
| 2026-04-09 12:00 |
20:29:28.57 |
-21:49:50.0 |
HIP 100951 |
22.51 |
| 2026-04-10 00:00 |
20:29:28.85 |
-21:49:49.6 |
HIP 100951 |
22.57 |
| 2026-04-10 12:00 |
20:29:29.11 |
-21:49:49.3 |
HIP 100951 |
22.62 |
| 2026-04-11 00:00 |
20:29:29.37 |
-21:49:49.0 |
HIP 100951 |
22.68 |
| 2026-04-11 12:00 |
20:29:29.63 |
-21:49:48.8 |
HIP 100951 |
22.73 |
| 2026-04-12 00:00 |
20:29:29.87 |
-21:49:48.5 |
HIP 100951 |
22.78 |
| 2026-04-12 12:00 |
20:29:30.11 |
-21:49:48.3 |
HIP 100951 |
22.83 |
| 2026-04-13 00:00 |
20:29:30.34 |
-21:49:48.1 |
HIP 100951 |
22.88 |
| 2026-04-13 12:00 |
20:29:30.56 |
-21:49:48.0 |
HIP 100951 |
22.92 |
| 2026-04-14 00:00 |
20:29:30.77 |
-21:49:47.8 |
HIP 100951 |
22.97 |
| 2026-04-14 12:00 |
20:29:30.98 |
-21:49:47.7 |
HIP 100951 |
23.01 |
| 2026-04-15 00:00 |
20:29:31.18 |
-21:49:47.7 |
HIP 100951 |
23.05 |
| 2026-04-15 12:00 |
20:29:31.37 |
-21:49:47.6 |
HIP 100951 |
23.09 |
| 2026-04-16 00:00 |
20:29:31.55 |
-21:49:47.6 |
HIP 100951 |
23.12 |