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) |
| 2026-03-26 00:00 |
21:05:23.13 |
-77:17:52.2 |
HIP 104018 |
15.20 |
| 2026-03-26 12:00 |
21:05:30.89 |
-77:18:15.2 |
HIP 104018 |
14.92 |
| 2026-03-27 00:00 |
21:05:38.57 |
-77:18:38.5 |
HIP 104018 |
14.66 |
| 2026-03-27 12:00 |
21:05:46.18 |
-77:19:01.9 |
HIP 104018 |
14.40 |
| 2026-03-28 00:00 |
21:05:53.72 |
-77:19:25.6 |
HIP 104018 |
14.17 |
| 2026-03-28 12:00 |
21:06:01.19 |
-77:19:49.5 |
HIP 104018 |
13.94 |
| 2026-03-29 00:00 |
21:06:08.59 |
-77:20:13.6 |
HIP 104018 |
13.73 |
| 2026-03-29 12:00 |
21:06:15.91 |
-77:20:37.9 |
HIP 104018 |
13.54 |
| 2026-03-30 00:00 |
21:06:23.16 |
-77:21:02.4 |
HIP 104018 |
13.36 |
| 2026-03-30 12:00 |
21:06:30.34 |
-77:21:27.1 |
HIP 104018 |
13.20 |
| 2026-03-31 00:00 |
21:06:37.45 |
-77:21:52.0 |
HIP 104018 |
13.06 |
| 2026-03-31 12:00 |
21:06:44.48 |
-77:22:17.1 |
HIP 104018 |
12.94 |
| 2026-04-01 00:00 |
21:06:51.44 |
-77:22:42.4 |
HIP 104018 |
12.83 |
| 2026-04-01 12:00 |
21:06:58.32 |
-77:23:07.8 |
HIP 104018 |
12.74 |
| 2026-04-02 00:00 |
21:07:05.13 |
-77:23:33.5 |
HIP 104018 |
12.67 |
| 2026-04-02 12:00 |
21:07:11.86 |
-77:23:59.4 |
HIP 104018 |
12.63 |
| 2026-04-03 00:00 |
21:07:18.52 |
-77:24:25.5 |
HIP 104018 |
12.60 |
| 2026-04-03 12:00 |
21:07:25.10 |
-77:24:51.7 |
HIP 104018 |
12.59 |
| 2026-04-04 00:00 |
21:07:31.60 |
-77:25:18.2 |
HIP 104018 |
12.60 |
| 2026-04-04 12:00 |
21:07:38.02 |
-77:25:44.8 |
HIP 104018 |
12.63 |
| 2026-04-05 00:00 |
21:07:44.37 |
-77:26:11.6 |
HIP 104018 |
12.68 |
| 2026-04-05 12:00 |
21:07:50.64 |
-77:26:38.7 |
HIP 104018 |
12.75 |
| 2026-04-06 00:00 |
21:07:56.82 |
-77:27:05.8 |
HIP 104018 |
12.83 |
| 2026-04-06 12:00 |
21:08:02.93 |
-77:27:33.2 |
HIP 104018 |
12.94 |
| 2026-04-07 00:00 |
21:08:08.96 |
-77:28:00.8 |
HIP 104018 |
13.06 |
| 2026-04-07 12:00 |
21:08:14.91 |
-77:28:28.5 |
HIP 104018 |
13.21 |
| 2026-04-08 00:00 |
21:08:20.77 |
-77:28:56.4 |
HIP 104018 |
13.36 |
| 2026-04-08 12:00 |
21:08:26.56 |
-77:29:24.5 |
HIP 104018 |
13.54 |
| 2026-04-09 00:00 |
21:08:32.26 |
-77:29:52.7 |
HIP 104018 |
13.73 |
| 2026-04-09 12:00 |
21:08:37.88 |
-77:30:21.1 |
HIP 104018 |
13.93 |
| 2026-04-10 00:00 |
21:08:43.42 |
-77:30:49.7 |
HIP 104018 |
14.15 |
| 2026-04-10 12:00 |
21:08:48.87 |
-77:31:18.5 |
HIP 104018 |
14.38 |
| 2026-04-11 00:00 |
21:08:54.24 |
-77:31:47.4 |
HIP 104018 |
14.63 |
| 2026-04-11 12:00 |
21:08:59.53 |
-77:32:16.5 |
HIP 104018 |
14.89 |
| 2026-04-12 00:00 |
21:09:04.73 |
-77:32:45.8 |
HIP 104018 |
15.16 |
| 2026-04-12 12:00 |
21:09:09.84 |
-77:33:15.2 |
HIP 104018 |
15.44 |
| 2026-04-13 00:00 |
21:09:14.87 |
-77:33:44.7 |
HIP 104691 |
15.70 |
| 2026-04-13 12:00 |
21:09:19.81 |
-77:34:14.5 |
HIP 104691 |
15.15 |
| 2026-04-14 00:00 |
21:09:24.67 |
-77:34:44.4 |
HIP 104691 |
14.60 |
| 2026-04-14 12:00 |
21:09:29.43 |
-77:35:14.4 |
HIP 104691 |
14.05 |
| 2026-04-15 00:00 |
21:09:34.11 |
-77:35:44.6 |
HIP 104691 |
13.51 |
| 2026-04-15 12:00 |
21:09:38.70 |
-77:36:14.9 |
HIP 104691 |
12.97 |
| 2026-04-16 00:00 |
21:09:43.20 |
-77:36:45.4 |
HIP 104691 |
12.44 |