메타데이터
| 항목 |
값 |
| Designation |
C/2007 U1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-08-07T01:09:20.272320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:13Z |
| Obs used |
871 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
7.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-09-04.0000000 |
| e |
1.00142595 |
| q (au) |
3.329202 |
| a (au) |
-2334.730148 |
| i (deg) |
157.786616 |
| Ω (om, deg) |
50.043135 |
| ω (w, deg) |
0.927038 |
| M (ma, deg) |
0.000244 |
밝기
산란 + 전체 선형
$$
M_a = (8.173 + 3.897\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
8.173 |
| n |
3.897 |
| gf |
0.830 |
| gb |
-0.613 |
| k |
0.994 |
| δ90 |
5.330 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2007-10-19 |
2008-02-05 |
+14.6988 |
-8.562 |
| 2008-02-05 |
2008-07-29 |
+6.0203 |
-3.221 |
| 2008-08-07 |
2009-11-18 |
-1.6673 |
+0.718 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
17:35:16.96 |
-10:36:29.2 |
HIP 85946 |
32.29 |
| 2026-05-12 12:00 |
17:35:13.83 |
-10:36:22.3 |
HIP 85946 |
31.92 |
| 2026-05-13 00:00 |
17:35:10.68 |
-10:36:15.4 |
HIP 85946 |
31.56 |
| 2026-05-13 12:00 |
17:35:07.51 |
-10:36:08.6 |
HIP 85946 |
31.22 |
| 2026-05-14 00:00 |
17:35:04.33 |
-10:36:01.8 |
HIP 85946 |
30.89 |
| 2026-05-14 12:00 |
17:35:01.14 |
-10:35:55.1 |
HIP 85946 |
30.57 |
| 2026-05-15 00:00 |
17:34:57.93 |
-10:35:48.5 |
HIP 85946 |
30.27 |
| 2026-05-15 12:00 |
17:34:54.70 |
-10:35:42.0 |
HIP 85946 |
29.98 |
| 2026-05-16 00:00 |
17:34:51.46 |
-10:35:35.5 |
HIP 85946 |
29.71 |
| 2026-05-16 12:00 |
17:34:48.20 |
-10:35:29.1 |
HIP 85946 |
29.45 |
| 2026-05-17 00:00 |
17:34:44.93 |
-10:35:22.8 |
HIP 85946 |
29.22 |
| 2026-05-17 12:00 |
17:34:41.64 |
-10:35:16.6 |
HIP 85946 |
29.00 |
| 2026-05-18 00:00 |
17:34:38.34 |
-10:35:10.4 |
HIP 85946 |
28.80 |
| 2026-05-18 12:00 |
17:34:35.03 |
-10:35:04.3 |
HIP 85946 |
28.62 |
| 2026-05-19 00:00 |
17:34:31.70 |
-10:34:58.2 |
HIP 85946 |
28.46 |
| 2026-05-19 12:00 |
17:34:28.36 |
-10:34:52.3 |
HIP 85946 |
28.32 |
| 2026-05-20 00:00 |
17:34:25.01 |
-10:34:46.4 |
HIP 85946 |
28.20 |
| 2026-05-20 12:00 |
17:34:21.64 |
-10:34:40.6 |
HIP 85946 |
28.10 |
| 2026-05-21 00:00 |
17:34:18.26 |
-10:34:34.9 |
HIP 85946 |
28.03 |
| 2026-05-21 12:00 |
17:34:14.87 |
-10:34:29.2 |
HIP 85946 |
27.98 |
| 2026-05-22 00:00 |
17:34:11.46 |
-10:34:23.7 |
HIP 85946 |
27.95 |
| 2026-05-22 12:00 |
17:34:08.05 |
-10:34:18.2 |
HIP 85946 |
27.95 |
| 2026-05-23 00:00 |
17:34:04.62 |
-10:34:12.8 |
HIP 85946 |
27.97 |
| 2026-05-23 12:00 |
17:34:01.18 |
-10:34:07.4 |
HIP 85946 |
28.02 |
| 2026-05-24 00:00 |
17:33:57.73 |
-10:34:02.2 |
HIP 85946 |
28.09 |
| 2026-05-24 12:00 |
17:33:54.27 |
-10:33:57.0 |
HIP 85946 |
28.18 |
| 2026-05-25 00:00 |
17:33:50.80 |
-10:33:51.9 |
HIP 85946 |
28.30 |
| 2026-05-25 12:00 |
17:33:47.32 |
-10:33:46.9 |
HIP 85946 |
28.44 |
| 2026-05-26 00:00 |
17:33:43.83 |
-10:33:42.0 |
HIP 85946 |
28.61 |
| 2026-05-26 12:00 |
17:33:40.33 |
-10:33:37.1 |
HIP 85946 |
28.80 |
| 2026-05-27 00:00 |
17:33:36.82 |
-10:33:32.3 |
HIP 85946 |
29.01 |
| 2026-05-27 12:00 |
17:33:33.30 |
-10:33:27.6 |
HIP 85946 |
29.25 |
| 2026-05-28 00:00 |
17:33:29.77 |
-10:33:23.0 |
HIP 85946 |
29.51 |
| 2026-05-28 12:00 |
17:33:26.23 |
-10:33:18.5 |
HIP 85946 |
29.79 |
| 2026-05-29 00:00 |
17:33:22.68 |
-10:33:14.0 |
HIP 85946 |
30.09 |
| 2026-05-29 12:00 |
17:33:19.13 |
-10:33:09.7 |
HIP 85946 |
30.42 |
| 2026-05-30 00:00 |
17:33:15.56 |
-10:33:05.4 |
HIP 85946 |
30.76 |
| 2026-05-30 12:00 |
17:33:11.99 |
-10:33:01.2 |
HIP 85946 |
31.13 |
| 2026-05-31 00:00 |
17:33:08.41 |
-10:32:57.1 |
HIP 85946 |
31.52 |
| 2026-05-31 12:00 |
17:33:04.83 |
-10:32:53.1 |
HIP 85946 |
31.92 |
| 2026-06-01 00:00 |
17:33:01.24 |
-10:32:49.1 |
HIP 85946 |
32.35 |
| 2026-06-01 12:00 |
17:32:57.64 |
-10:32:45.3 |
HIP 85946 |
32.79 |
| 2026-06-02 00:00 |
17:32:54.03 |
-10:32:41.5 |
HIP 85946 |
33.25 |