메타데이터
| 항목 |
값 |
| Designation |
C/2002 U2 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-12-31T23:39:13.196160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:22Z |
| Obs used |
372 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
12.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-01-02.0000000 |
| e |
1.00004468 |
| q (au) |
1.208632 |
| a (au) |
-27048.498281 |
| i (deg) |
59.135691 |
| Ω (om, deg) |
38.776625 |
| ω (w, deg) |
95.846952 |
| M (ma, deg) |
0.000000 |
밝기
산란 + 전체 선형
$$
M_a = (13.157 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.157 |
| n |
6.000 |
| gf |
0.984 |
| gb |
-0.818 |
| k |
0.997 |
| δ90 |
9.697 |
| 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) |
| 2026-05-12 00:00 |
21:11:25.82 |
-78:05:36.5 |
HIP 104691 |
20.18 |
| 2026-05-12 12:00 |
21:11:25.12 |
-78:06:11.4 |
HIP 104691 |
20.76 |
| 2026-05-13 00:00 |
21:11:24.32 |
-78:06:46.4 |
HIP 104691 |
21.34 |
| 2026-05-13 12:00 |
21:11:23.42 |
-78:07:21.5 |
HIP 104691 |
21.92 |
| 2026-05-14 00:00 |
21:11:22.41 |
-78:07:56.5 |
HIP 104691 |
22.51 |
| 2026-05-14 12:00 |
21:11:21.30 |
-78:08:31.5 |
HIP 104691 |
23.10 |
| 2026-05-15 00:00 |
21:11:20.07 |
-78:09:06.6 |
HIP 104691 |
23.68 |
| 2026-05-15 12:00 |
21:11:18.75 |
-78:09:41.7 |
HIP 104691 |
24.27 |
| 2026-05-16 00:00 |
21:11:17.31 |
-78:10:16.7 |
HIP 104691 |
24.86 |
| 2026-05-16 12:00 |
21:11:15.77 |
-78:10:51.8 |
HIP 104691 |
25.45 |
| 2026-05-17 00:00 |
21:11:14.12 |
-78:11:26.9 |
HIP 104691 |
26.04 |
| 2026-05-17 12:00 |
21:11:12.37 |
-78:12:01.9 |
HIP 104691 |
26.63 |
| 2026-05-18 00:00 |
21:11:10.51 |
-78:12:37.0 |
HIP 104691 |
27.22 |
| 2026-05-18 12:00 |
21:11:08.54 |
-78:13:12.0 |
HIP 104691 |
27.82 |
| 2026-05-19 00:00 |
21:11:06.47 |
-78:13:47.0 |
HIP 104691 |
28.41 |
| 2026-05-19 12:00 |
21:11:04.28 |
-78:14:22.0 |
HIP 105316 |
28.37 |
| 2026-05-20 00:00 |
21:11:02.00 |
-78:14:57.0 |
HIP 105316 |
28.27 |
| 2026-05-20 12:00 |
21:10:59.60 |
-78:15:32.0 |
HIP 105316 |
28.19 |
| 2026-05-21 00:00 |
21:10:57.10 |
-78:16:06.9 |
HIP 105316 |
28.12 |
| 2026-05-21 12:00 |
21:10:54.49 |
-78:16:41.8 |
HIP 105316 |
28.07 |
| 2026-05-22 00:00 |
21:10:51.78 |
-78:17:16.7 |
HIP 105316 |
28.04 |
| 2026-05-22 12:00 |
21:10:48.96 |
-78:17:51.5 |
HIP 105316 |
28.02 |
| 2026-05-23 00:00 |
21:10:46.03 |
-78:18:26.3 |
HIP 105316 |
28.03 |
| 2026-05-23 12:00 |
21:10:42.99 |
-78:19:01.1 |
HIP 105316 |
28.05 |
| 2026-05-24 00:00 |
21:10:39.85 |
-78:19:35.8 |
HIP 105316 |
28.09 |
| 2026-05-24 12:00 |
21:10:36.61 |
-78:20:10.5 |
HIP 105316 |
28.14 |
| 2026-05-25 00:00 |
21:10:33.25 |
-78:20:45.1 |
HIP 105316 |
28.22 |
| 2026-05-25 12:00 |
21:10:29.79 |
-78:21:19.7 |
HIP 105316 |
28.31 |
| 2026-05-26 00:00 |
21:10:26.23 |
-78:21:54.2 |
HIP 105316 |
28.42 |
| 2026-05-26 12:00 |
21:10:22.56 |
-78:22:28.7 |
HIP 105316 |
28.55 |
| 2026-05-27 00:00 |
21:10:18.78 |
-78:23:03.1 |
HIP 105316 |
28.70 |
| 2026-05-27 12:00 |
21:10:14.90 |
-78:23:37.4 |
HIP 105316 |
28.86 |
| 2026-05-28 00:00 |
21:10:10.91 |
-78:24:11.7 |
HIP 105316 |
29.04 |
| 2026-05-28 12:00 |
21:10:06.82 |
-78:24:45.9 |
HIP 105316 |
29.23 |
| 2026-05-29 00:00 |
21:10:02.62 |
-78:25:20.0 |
HIP 105316 |
29.44 |
| 2026-05-29 12:00 |
21:09:58.31 |
-78:25:54.1 |
HIP 105316 |
29.67 |
| 2026-05-30 00:00 |
21:09:53.91 |
-78:26:28.1 |
HIP 105316 |
29.91 |
| 2026-05-30 12:00 |
21:09:49.39 |
-78:27:02.0 |
HIP 105316 |
30.17 |
| 2026-05-31 00:00 |
21:09:44.77 |
-78:27:35.9 |
HIP 105316 |
30.44 |
| 2026-05-31 12:00 |
21:09:40.05 |
-78:28:09.6 |
HIP 105316 |
30.73 |
| 2026-06-01 00:00 |
21:09:35.22 |
-78:28:43.3 |
HIP 105316 |
31.03 |
| 2026-06-01 12:00 |
21:09:30.29 |
-78:29:16.9 |
HIP 105316 |
31.35 |
| 2026-06-02 00:00 |
21:09:25.25 |
-78:29:50.4 |
HIP 105316 |
31.67 |