메타데이터
| 항목 |
값 |
| Designation |
C/2000 SV74 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-04-30T12:44:48.128640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:06Z |
| Obs used |
2039 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
5.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2002-12-17.0000000 |
| e |
1.00486188 |
| q (au) |
3.541897 |
| a (au) |
-728.503515 |
| i (deg) |
75.236666 |
| Ω (om, deg) |
24.186314 |
| ω (w, deg) |
76.239354 |
| M (ma, deg) |
0.011552 |
밝기
산란 + 전체 선형
$$
M_a = (4.901 + 3.631\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.901 |
| n |
3.631 |
| gf |
0.850 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.002 |
| 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 |
| 2000-10-21 |
2002-04-10 |
-2.1213 |
+1.220 |
| 2002-04-30 |
2005-04-05 |
-2.0066 |
+1.694 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
12:51:25.41 |
-51:18:40.3 |
HIP 62689 |
13.55 |
| 2026-07-29 12:00 |
12:51:26.85 |
-51:18:20.4 |
HIP 62689 |
13.95 |
| 2026-07-30 00:00 |
12:51:28.31 |
-51:18:00.7 |
HIP 62689 |
14.35 |
| 2026-07-30 12:00 |
12:51:29.81 |
-51:17:41.2 |
HIP 62689 |
14.75 |
| 2026-07-31 00:00 |
12:51:31.34 |
-51:17:21.9 |
HIP 62689 |
15.14 |
| 2026-07-31 12:00 |
12:51:32.90 |
-51:17:02.7 |
HIP 62689 |
15.54 |
| 2026-08-01 00:00 |
12:51:34.49 |
-51:16:43.8 |
HIP 62689 |
15.94 |
| 2026-08-01 12:00 |
12:51:36.10 |
-51:16:25.0 |
HIP 62689 |
16.34 |
| 2026-08-02 00:00 |
12:51:37.75 |
-51:16:06.4 |
HIP 62824 |
16.68 |
| 2026-08-02 12:00 |
12:51:39.42 |
-51:15:48.0 |
HIP 62824 |
16.84 |
| 2026-08-03 00:00 |
12:51:41.12 |
-51:15:29.8 |
HIP 62824 |
17.00 |
| 2026-08-03 12:00 |
12:51:42.85 |
-51:15:11.8 |
HIP 62824 |
17.16 |
| 2026-08-04 00:00 |
12:51:44.61 |
-51:14:53.9 |
HIP 62824 |
17.33 |
| 2026-08-04 12:00 |
12:51:46.40 |
-51:14:36.3 |
HIP 62824 |
17.51 |
| 2026-08-05 00:00 |
12:51:48.22 |
-51:14:18.9 |
HIP 62824 |
17.68 |
| 2026-08-05 12:00 |
12:51:50.06 |
-51:14:01.7 |
HIP 62824 |
17.86 |
| 2026-08-06 00:00 |
12:51:51.93 |
-51:13:44.6 |
HIP 62824 |
18.04 |
| 2026-08-06 12:00 |
12:51:53.83 |
-51:13:27.8 |
HIP 62824 |
18.22 |
| 2026-08-07 00:00 |
12:51:55.76 |
-51:13:11.2 |
HIP 62824 |
18.41 |
| 2026-08-07 12:00 |
12:51:57.72 |
-51:12:54.7 |
HIP 62824 |
18.60 |
| 2026-08-08 00:00 |
12:51:59.70 |
-51:12:38.5 |
HIP 62824 |
18.79 |
| 2026-08-08 12:00 |
12:52:01.71 |
-51:12:22.5 |
HIP 62824 |
18.99 |
| 2026-08-09 00:00 |
12:52:03.75 |
-51:12:06.7 |
HIP 62824 |
19.19 |
| 2026-08-09 12:00 |
12:52:05.82 |
-51:11:51.1 |
HIP 62824 |
19.39 |
| 2026-08-10 00:00 |
12:52:07.91 |
-51:11:35.7 |
HIP 62824 |
19.59 |
| 2026-08-10 12:00 |
12:52:10.03 |
-51:11:20.5 |
HIP 62824 |
19.80 |
| 2026-08-11 00:00 |
12:52:12.17 |
-51:11:05.6 |
HIP 62824 |
20.00 |
| 2026-08-11 12:00 |
12:52:14.34 |
-51:10:50.8 |
HIP 62824 |
20.22 |
| 2026-08-12 00:00 |
12:52:16.54 |
-51:10:36.3 |
HIP 62824 |
20.43 |
| 2026-08-12 12:00 |
12:52:18.77 |
-51:10:21.9 |
HIP 62824 |
20.64 |
| 2026-08-13 00:00 |
12:52:21.02 |
-51:10:07.8 |
HIP 62824 |
20.86 |
| 2026-08-13 12:00 |
12:52:23.29 |
-51:09:54.0 |
HIP 62968 |
20.80 |
| 2026-08-14 00:00 |
12:52:25.60 |
-51:09:40.3 |
HIP 62968 |
20.64 |
| 2026-08-14 12:00 |
12:52:27.92 |
-51:09:26.8 |
HIP 62968 |
20.49 |
| 2026-08-15 00:00 |
12:52:30.27 |
-51:09:13.6 |
HIP 62968 |
20.33 |
| 2026-08-15 12:00 |
12:52:32.65 |
-51:09:00.6 |
HIP 62968 |
20.18 |
| 2026-08-16 00:00 |
12:52:35.05 |
-51:08:47.8 |
HIP 62968 |
20.04 |
| 2026-08-16 12:00 |
12:52:37.48 |
-51:08:35.3 |
HIP 62968 |
19.89 |
| 2026-08-17 00:00 |
12:52:39.93 |
-51:08:23.0 |
HIP 62968 |
19.75 |
| 2026-08-17 12:00 |
12:52:42.41 |
-51:08:10.8 |
HIP 62968 |
19.61 |
| 2026-08-18 00:00 |
12:52:44.91 |
-51:07:59.0 |
HIP 62968 |
19.48 |
| 2026-08-18 12:00 |
12:52:47.43 |
-51:07:47.3 |
HIP 62968 |
19.35 |
| 2026-08-19 00:00 |
12:52:49.98 |
-51:07:35.9 |
HIP 62968 |
19.22 |