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) |
| 2026-05-12 00:00 |
20:33:29.10 |
-43:09:21.8 |
HIP 101415 |
10.85 |
| 2026-05-12 12:00 |
20:33:28.08 |
-43:09:39.2 |
HIP 101415 |
10.51 |
| 2026-05-13 00:00 |
20:33:27.03 |
-43:09:56.7 |
HIP 101415 |
10.17 |
| 2026-05-13 12:00 |
20:33:25.96 |
-43:10:14.3 |
HIP 101415 |
9.83 |
| 2026-05-14 00:00 |
20:33:24.85 |
-43:10:31.8 |
HIP 101415 |
9.49 |
| 2026-05-14 12:00 |
20:33:23.72 |
-43:10:49.4 |
HIP 101415 |
9.15 |
| 2026-05-15 00:00 |
20:33:22.56 |
-43:11:07.0 |
HIP 101415 |
8.80 |
| 2026-05-15 12:00 |
20:33:21.38 |
-43:11:24.7 |
HIP 101415 |
8.46 |
| 2026-05-16 00:00 |
20:33:20.16 |
-43:11:42.4 |
HIP 101415 |
8.11 |
| 2026-05-16 12:00 |
20:33:18.92 |
-43:12:00.1 |
HIP 101415 |
7.77 |
| 2026-05-17 00:00 |
20:33:17.66 |
-43:12:17.8 |
HIP 101415 |
7.43 |
| 2026-05-17 12:00 |
20:33:16.36 |
-43:12:35.6 |
HIP 101415 |
7.09 |
| 2026-05-18 00:00 |
20:33:15.04 |
-43:12:53.4 |
HIP 101415 |
6.75 |
| 2026-05-18 12:00 |
20:33:13.69 |
-43:13:11.2 |
HIP 101415 |
6.41 |
| 2026-05-19 00:00 |
20:33:12.32 |
-43:13:29.0 |
HIP 101415 |
6.08 |
| 2026-05-19 12:00 |
20:33:10.92 |
-43:13:46.9 |
HIP 101415 |
5.76 |
| 2026-05-20 00:00 |
20:33:09.49 |
-43:14:04.8 |
HIP 101415 |
5.45 |
| 2026-05-20 12:00 |
20:33:08.04 |
-43:14:22.6 |
HIP 101415 |
5.14 |
| 2026-05-21 00:00 |
20:33:06.56 |
-43:14:40.6 |
HIP 101415 |
4.85 |
| 2026-05-21 12:00 |
20:33:05.05 |
-43:14:58.5 |
HIP 101415 |
4.58 |
| 2026-05-22 00:00 |
20:33:03.52 |
-43:15:16.4 |
HIP 101415 |
4.33 |
| 2026-05-22 12:00 |
20:33:01.97 |
-43:15:34.4 |
HIP 101415 |
4.10 |
| 2026-05-23 00:00 |
20:33:00.38 |
-43:15:52.3 |
HIP 101415 |
3.91 |
| 2026-05-23 12:00 |
20:32:58.77 |
-43:16:10.3 |
HIP 101415 |
3.76 |
| 2026-05-24 00:00 |
20:32:57.14 |
-43:16:28.2 |
HIP 101415 |
3.65 |
| 2026-05-24 12:00 |
20:32:55.48 |
-43:16:46.2 |
HIP 101415 |
3.59 |
| 2026-05-25 00:00 |
20:32:53.79 |
-43:17:04.2 |
HIP 101415 |
3.58 |
| 2026-05-25 12:00 |
20:32:52.08 |
-43:17:22.2 |
HIP 101415 |
3.63 |
| 2026-05-26 00:00 |
20:32:50.35 |
-43:17:40.2 |
HIP 101415 |
3.73 |
| 2026-05-26 12:00 |
20:32:48.59 |
-43:17:58.2 |
HIP 101415 |
3.88 |
| 2026-05-27 00:00 |
20:32:46.80 |
-43:18:16.1 |
HIP 101415 |
4.08 |
| 2026-05-27 12:00 |
20:32:44.99 |
-43:18:34.1 |
HIP 101415 |
4.32 |
| 2026-05-28 00:00 |
20:32:43.16 |
-43:18:52.1 |
HIP 101415 |
4.59 |
| 2026-05-28 12:00 |
20:32:41.30 |
-43:19:10.1 |
HIP 101415 |
4.89 |
| 2026-05-29 00:00 |
20:32:39.42 |
-43:19:28.1 |
HIP 101415 |
5.22 |
| 2026-05-29 12:00 |
20:32:37.51 |
-43:19:46.0 |
HIP 101415 |
5.58 |
| 2026-05-30 00:00 |
20:32:35.58 |
-43:20:04.0 |
HIP 101415 |
5.95 |
| 2026-05-30 12:00 |
20:32:33.62 |
-43:20:21.9 |
HIP 101415 |
6.33 |
| 2026-05-31 00:00 |
20:32:31.64 |
-43:20:39.9 |
HIP 101415 |
6.74 |
| 2026-05-31 12:00 |
20:32:29.64 |
-43:20:57.8 |
HIP 101415 |
7.15 |
| 2026-06-01 00:00 |
20:32:27.61 |
-43:21:15.7 |
HIP 101415 |
7.57 |
| 2026-06-01 12:00 |
20:32:25.56 |
-43:21:33.6 |
HIP 101415 |
8.01 |
| 2026-06-02 00:00 |
20:32:23.48 |
-43:21:51.5 |
HIP 101415 |
8.45 |