메타데이터
| 항목 |
값 |
| Designation |
C/2013 UQ4 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2014-07-05T23:01:47.953920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:42Z |
| Obs used |
1853 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
6.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2014-07-12.0000000 |
| e |
0.98215354 |
| q (au) |
1.080975 |
| a (au) |
60.570843 |
| i (deg) |
145.258572 |
| Ω (om, deg) |
317.662397 |
| ω (w, deg) |
23.312164 |
| M (ma, deg) |
0.012629 |
밝기
산란 + 전체 선형
$$
M_a = (11.588 + 5.145\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.588 |
| n |
5.145 |
| gf |
0.800 |
| gb |
-0.748 |
| k |
0.800 |
| δ90 |
3.096 |
| 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 |
| 2014-05-07 |
2014-07-05 |
-2.4544 |
-0.050 |
| 2014-07-05 |
2014-08-12 |
+15.6290 |
-0.425 |
| 2014-08-12 |
2015-02-26 |
-4.0603 |
+1.408 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
09:00:57.18 |
+15:07:35.1 |
HIP 44313 |
8.82 |
| 2026-06-01 12:00 |
09:00:58.92 |
+15:07:27.4 |
HIP 44313 |
8.51 |
| 2026-06-02 00:00 |
09:01:00.69 |
+15:07:19.6 |
HIP 44313 |
8.21 |
| 2026-06-02 12:00 |
09:01:02.50 |
+15:07:11.6 |
HIP 44313 |
7.91 |
| 2026-06-03 00:00 |
09:01:04.33 |
+15:07:03.4 |
HIP 44313 |
7.62 |
| 2026-06-03 12:00 |
09:01:06.19 |
+15:06:55.2 |
HIP 44313 |
7.35 |
| 2026-06-04 00:00 |
09:01:08.08 |
+15:06:46.8 |
HIP 44313 |
7.10 |
| 2026-06-04 12:00 |
09:01:10.00 |
+15:06:38.2 |
HIP 44313 |
6.86 |
| 2026-06-05 00:00 |
09:01:11.96 |
+15:06:29.6 |
HIP 44313 |
6.65 |
| 2026-06-05 12:00 |
09:01:13.94 |
+15:06:20.8 |
HIP 44313 |
6.47 |
| 2026-06-06 00:00 |
09:01:15.95 |
+15:06:11.8 |
HIP 44313 |
6.32 |
| 2026-06-06 12:00 |
09:01:17.99 |
+15:06:02.7 |
HIP 44313 |
6.21 |
| 2026-06-07 00:00 |
09:01:20.06 |
+15:05:53.5 |
HIP 44313 |
6.14 |
| 2026-06-07 12:00 |
09:01:22.15 |
+15:05:44.2 |
HIP 44313 |
6.11 |
| 2026-06-08 00:00 |
09:01:24.28 |
+15:05:34.7 |
HIP 44313 |
6.13 |
| 2026-06-08 12:00 |
09:01:26.43 |
+15:05:25.1 |
HIP 44313 |
6.20 |
| 2026-06-09 00:00 |
09:01:28.61 |
+15:05:15.4 |
HIP 44313 |
6.31 |
| 2026-06-09 12:00 |
09:01:30.82 |
+15:05:05.5 |
HIP 44313 |
6.48 |
| 2026-06-10 00:00 |
09:01:33.06 |
+15:04:55.5 |
HIP 44313 |
6.68 |
| 2026-06-10 12:00 |
09:01:35.33 |
+15:04:45.3 |
HIP 44313 |
6.94 |
| 2026-06-11 00:00 |
09:01:37.62 |
+15:04:35.1 |
HIP 44313 |
7.23 |
| 2026-06-11 12:00 |
09:01:39.94 |
+15:04:24.7 |
HIP 44313 |
7.56 |
| 2026-06-12 00:00 |
09:01:42.29 |
+15:04:14.2 |
HIP 44313 |
7.92 |
| 2026-06-12 12:00 |
09:01:44.66 |
+15:04:03.5 |
HIP 44313 |
8.31 |
| 2026-06-13 00:00 |
09:01:47.06 |
+15:03:52.8 |
HIP 44313 |
8.74 |
| 2026-06-13 12:00 |
09:01:49.49 |
+15:03:41.9 |
HIP 44313 |
9.19 |
| 2026-06-14 00:00 |
09:01:51.94 |
+15:03:30.8 |
HIP 44313 |
9.66 |
| 2026-06-14 12:00 |
09:01:54.42 |
+15:03:19.7 |
HIP 44313 |
10.15 |
| 2026-06-15 00:00 |
09:01:56.93 |
+15:03:08.4 |
HIP 44313 |
10.67 |
| 2026-06-15 12:00 |
09:01:59.46 |
+15:02:57.0 |
HIP 44313 |
11.20 |
| 2026-06-16 00:00 |
09:02:02.02 |
+15:02:45.5 |
HIP 44313 |
11.74 |
| 2026-06-16 12:00 |
09:02:04.60 |
+15:02:33.9 |
HIP 44313 |
12.31 |
| 2026-06-17 00:00 |
09:02:07.21 |
+15:02:22.1 |
HIP 44313 |
12.88 |
| 2026-06-17 12:00 |
09:02:09.84 |
+15:02:10.2 |
HIP 44313 |
13.47 |
| 2026-06-18 00:00 |
09:02:12.50 |
+15:01:58.2 |
HIP 44313 |
14.07 |
| 2026-06-18 12:00 |
09:02:15.18 |
+15:01:46.1 |
HIP 44313 |
14.69 |
| 2026-06-19 00:00 |
09:02:17.88 |
+15:01:33.9 |
HIP 44313 |
15.31 |
| 2026-06-19 12:00 |
09:02:20.61 |
+15:01:21.5 |
HIP 44313 |
15.95 |
| 2026-06-20 00:00 |
09:02:23.36 |
+15:01:09.0 |
HIP 44313 |
16.59 |
| 2026-06-20 12:00 |
09:02:26.13 |
+15:00:56.5 |
HIP 44313 |
17.25 |
| 2026-06-21 00:00 |
09:02:28.93 |
+15:00:43.8 |
HIP 44313 |
17.91 |
| 2026-06-21 12:00 |
09:02:31.75 |
+15:00:31.0 |
HIP 44313 |
18.59 |
| 2026-06-22 00:00 |
09:02:34.59 |
+15:00:18.1 |
HIP 44313 |
19.27 |