메타데이터
| 항목 |
값 |
| Designation |
C/1998 U1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1998-05-02T12:00:10.497600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:57Z |
| Obs used |
122 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1998-11-12.0000000 |
| e |
1.00043848 |
| q (au) |
3.975445 |
| a (au) |
-9066.409392 |
| i (deg) |
156.428505 |
| Ω (om, deg) |
210.457099 |
| ω (w, deg) |
124.645648 |
| M (ma, deg) |
0.000221 |
밝기
산란 + 전체 선형
$$
M_a = (12.169 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.169 |
| n |
2.000 |
| gf |
0.857 |
| gb |
-0.501 |
| k |
1.000 |
| δ90 |
2.868 |
| 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 |
20:33:02.58 |
-42:47:31.7 |
HIP 101334 |
20.91 |
| 2026-03-26 12:00 |
20:33:04.09 |
-42:47:40.8 |
HIP 101334 |
20.89 |
| 2026-03-27 00:00 |
20:33:05.56 |
-42:47:50.0 |
HIP 101334 |
20.86 |
| 2026-03-27 12:00 |
20:33:07.02 |
-42:47:59.3 |
HIP 101334 |
20.83 |
| 2026-03-28 00:00 |
20:33:08.45 |
-42:48:08.8 |
HIP 101334 |
20.80 |
| 2026-03-28 12:00 |
20:33:09.85 |
-42:48:18.4 |
HIP 101334 |
20.78 |
| 2026-03-29 00:00 |
20:33:11.24 |
-42:48:28.1 |
HIP 101334 |
20.75 |
| 2026-03-29 12:00 |
20:33:12.59 |
-42:48:38.0 |
HIP 101334 |
20.72 |
| 2026-03-30 00:00 |
20:33:13.93 |
-42:48:48.0 |
HIP 101334 |
20.70 |
| 2026-03-30 12:00 |
20:33:15.23 |
-42:48:58.1 |
HIP 101334 |
20.67 |
| 2026-03-31 00:00 |
20:33:16.52 |
-42:49:08.3 |
HIP 101334 |
20.65 |
| 2026-03-31 12:00 |
20:33:17.78 |
-42:49:18.6 |
HIP 101334 |
20.62 |
| 2026-04-01 00:00 |
20:33:19.01 |
-42:49:29.1 |
HIP 101334 |
20.60 |
| 2026-04-01 12:00 |
20:33:20.22 |
-42:49:39.7 |
HIP 101334 |
20.57 |
| 2026-04-02 00:00 |
20:33:21.41 |
-42:49:50.4 |
HIP 101334 |
20.55 |
| 2026-04-02 12:00 |
20:33:22.57 |
-42:50:01.2 |
HIP 101334 |
20.52 |
| 2026-04-03 00:00 |
20:33:23.70 |
-42:50:12.1 |
HIP 101334 |
20.49 |
| 2026-04-03 12:00 |
20:33:24.81 |
-42:50:23.2 |
HIP 101334 |
20.46 |
| 2026-04-04 00:00 |
20:33:25.89 |
-42:50:34.4 |
HIP 101334 |
20.44 |
| 2026-04-04 12:00 |
20:33:26.95 |
-42:50:45.7 |
HIP 101334 |
20.41 |
| 2026-04-05 00:00 |
20:33:27.98 |
-42:50:57.1 |
HIP 101334 |
20.38 |
| 2026-04-05 12:00 |
20:33:28.99 |
-42:51:08.6 |
HIP 101334 |
20.34 |
| 2026-04-06 00:00 |
20:33:29.97 |
-42:51:20.2 |
HIP 101334 |
20.31 |
| 2026-04-06 12:00 |
20:33:30.93 |
-42:51:32.0 |
HIP 101334 |
20.28 |
| 2026-04-07 00:00 |
20:33:31.86 |
-42:51:43.9 |
HIP 101334 |
20.24 |
| 2026-04-07 12:00 |
20:33:32.76 |
-42:51:55.8 |
HIP 101334 |
20.21 |
| 2026-04-08 00:00 |
20:33:33.64 |
-42:52:07.9 |
HIP 101334 |
20.17 |
| 2026-04-08 12:00 |
20:33:34.49 |
-42:52:20.1 |
HIP 101334 |
20.13 |
| 2026-04-09 00:00 |
20:33:35.32 |
-42:52:32.4 |
HIP 101334 |
20.09 |
| 2026-04-09 12:00 |
20:33:36.11 |
-42:52:44.9 |
HIP 101334 |
20.05 |
| 2026-04-10 00:00 |
20:33:36.89 |
-42:52:57.4 |
HIP 101334 |
20.00 |
| 2026-04-10 12:00 |
20:33:37.63 |
-42:53:10.0 |
HIP 101334 |
19.96 |
| 2026-04-11 00:00 |
20:33:38.35 |
-42:53:22.8 |
HIP 101334 |
19.91 |
| 2026-04-11 12:00 |
20:33:39.04 |
-42:53:35.6 |
HIP 101334 |
19.86 |
| 2026-04-12 00:00 |
20:33:39.71 |
-42:53:48.6 |
HIP 101334 |
19.81 |
| 2026-04-12 12:00 |
20:33:40.35 |
-42:54:01.7 |
HIP 101334 |
19.76 |
| 2026-04-13 00:00 |
20:33:40.96 |
-42:54:14.8 |
HIP 101334 |
19.70 |
| 2026-04-13 12:00 |
20:33:41.55 |
-42:54:28.1 |
HIP 101334 |
19.64 |
| 2026-04-14 00:00 |
20:33:42.10 |
-42:54:41.5 |
HIP 101334 |
19.59 |
| 2026-04-14 12:00 |
20:33:42.63 |
-42:54:55.0 |
HIP 101334 |
19.52 |
| 2026-04-15 00:00 |
20:33:43.14 |
-42:55:08.6 |
HIP 101334 |
19.46 |
| 2026-04-15 12:00 |
20:33:43.61 |
-42:55:22.2 |
HIP 101334 |
19.40 |
| 2026-04-16 00:00 |
20:33:44.06 |
-42:55:36.0 |
HIP 101334 |
19.33 |