메타데이터
| 항목 |
값 |
| Designation |
C/1946 U1 (Bester) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1947-02-07T08:36:00.273600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
34 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1947-01-12.0000000 |
| e |
1.00061189 |
| q (au) |
2.407675 |
| a (au) |
-3934.834500 |
| i (deg) |
108.175807 |
| Ω (om, deg) |
35.557431 |
| ω (w, deg) |
348.621875 |
| M (ma, deg) |
-0.000105 |
밝기
산란 + 전체 선형
$$
M_a = (1.950 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
1.950 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.739 |
| k |
1.000 |
| δ90 |
10.000 |
| 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 |
15:20:47.27 |
+10:07:28.5 |
HIP 75128 |
6.24 |
| 2026-07-29 12:00 |
15:20:46.94 |
+10:07:21.4 |
HIP 75128 |
6.24 |
| 2026-07-30 00:00 |
15:20:46.61 |
+10:07:14.2 |
HIP 75128 |
6.25 |
| 2026-07-30 12:00 |
15:20:46.30 |
+10:07:07.0 |
HIP 75128 |
6.25 |
| 2026-07-31 00:00 |
15:20:45.99 |
+10:06:59.7 |
HIP 75128 |
6.25 |
| 2026-07-31 12:00 |
15:20:45.69 |
+10:06:52.4 |
HIP 75128 |
6.26 |
| 2026-08-01 00:00 |
15:20:45.41 |
+10:06:45.0 |
HIP 75128 |
6.27 |
| 2026-08-01 12:00 |
15:20:45.13 |
+10:06:37.6 |
HIP 75128 |
6.27 |
| 2026-08-02 00:00 |
15:20:44.86 |
+10:06:30.2 |
HIP 75128 |
6.28 |
| 2026-08-02 12:00 |
15:20:44.60 |
+10:06:22.6 |
HIP 75128 |
6.29 |
| 2026-08-03 00:00 |
15:20:44.35 |
+10:06:15.1 |
HIP 75128 |
6.30 |
| 2026-08-03 12:00 |
15:20:44.11 |
+10:06:07.5 |
HIP 75128 |
6.31 |
| 2026-08-04 00:00 |
15:20:43.88 |
+10:05:59.8 |
HIP 75128 |
6.32 |
| 2026-08-04 12:00 |
15:20:43.66 |
+10:05:52.2 |
HIP 75128 |
6.33 |
| 2026-08-05 00:00 |
15:20:43.44 |
+10:05:44.4 |
HIP 75128 |
6.34 |
| 2026-08-05 12:00 |
15:20:43.24 |
+10:05:36.6 |
HIP 75128 |
6.35 |
| 2026-08-06 00:00 |
15:20:43.05 |
+10:05:28.8 |
HIP 75128 |
6.36 |
| 2026-08-06 12:00 |
15:20:42.86 |
+10:05:20.9 |
HIP 75128 |
6.38 |
| 2026-08-07 00:00 |
15:20:42.69 |
+10:05:13.0 |
HIP 75128 |
6.39 |
| 2026-08-07 12:00 |
15:20:42.52 |
+10:05:05.1 |
HIP 75128 |
6.41 |
| 2026-08-08 00:00 |
15:20:42.37 |
+10:04:57.1 |
HIP 75128 |
6.42 |
| 2026-08-08 12:00 |
15:20:42.22 |
+10:04:49.1 |
HIP 75128 |
6.44 |
| 2026-08-09 00:00 |
15:20:42.08 |
+10:04:41.0 |
HIP 75128 |
6.45 |
| 2026-08-09 12:00 |
15:20:41.96 |
+10:04:32.9 |
HIP 75128 |
6.47 |
| 2026-08-10 00:00 |
15:20:41.84 |
+10:04:24.7 |
HIP 75128 |
6.49 |
| 2026-08-10 12:00 |
15:20:41.73 |
+10:04:16.5 |
HIP 75128 |
6.50 |
| 2026-08-11 00:00 |
15:20:41.63 |
+10:04:08.3 |
HIP 75128 |
6.52 |
| 2026-08-11 12:00 |
15:20:41.54 |
+10:04:00.1 |
HIP 75128 |
6.54 |
| 2026-08-12 00:00 |
15:20:41.46 |
+10:03:51.8 |
HIP 75128 |
6.56 |
| 2026-08-12 12:00 |
15:20:41.39 |
+10:03:43.4 |
HIP 75128 |
6.58 |
| 2026-08-13 00:00 |
15:20:41.33 |
+10:03:35.0 |
HIP 75128 |
6.60 |
| 2026-08-13 12:00 |
15:20:41.28 |
+10:03:26.6 |
HIP 75128 |
6.62 |
| 2026-08-14 00:00 |
15:20:41.24 |
+10:03:18.2 |
HIP 75128 |
6.64 |
| 2026-08-14 12:00 |
15:20:41.21 |
+10:03:09.7 |
HIP 75128 |
6.66 |
| 2026-08-15 00:00 |
15:20:41.19 |
+10:03:01.2 |
HIP 75128 |
6.69 |
| 2026-08-15 12:00 |
15:20:41.18 |
+10:02:52.7 |
HIP 75128 |
6.71 |
| 2026-08-16 00:00 |
15:20:41.18 |
+10:02:44.1 |
HIP 75128 |
6.73 |
| 2026-08-16 12:00 |
15:20:41.19 |
+10:02:35.5 |
HIP 75128 |
6.76 |
| 2026-08-17 00:00 |
15:20:41.20 |
+10:02:26.9 |
HIP 75128 |
6.78 |
| 2026-08-17 12:00 |
15:20:41.23 |
+10:02:18.2 |
HIP 75128 |
6.81 |
| 2026-08-18 00:00 |
15:20:41.27 |
+10:02:09.5 |
HIP 75128 |
6.84 |
| 2026-08-18 12:00 |
15:20:41.31 |
+10:02:00.8 |
HIP 75128 |
6.87 |
| 2026-08-19 00:00 |
15:20:41.37 |
+10:01:52.1 |
HIP 75128 |
6.89 |