메타데이터
| 항목 |
값 |
| Designation |
C/2007 G1 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2008-11-16T10:11:22.225920Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:06Z |
| Obs used |
2001 |
| NEO |
- |
| M1 |
10.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2008-01-11.0000000 |
| e |
1.00150564 |
| q (au) |
2.646214 |
| a (au) |
-1757.531288 |
| i (deg) |
88.358397 |
| Ω (om, deg) |
78.992256 |
| ω (w, deg) |
224.020457 |
| M (ma, deg) |
-0.004152 |
밝기
산란 + 전체 선형
$$
M_a = (12.690 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.690 |
| n |
2.000 |
| gf |
0.988 |
| gb |
-0.732 |
| k |
0.800 |
| δ90 |
10.000 |
| 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 |
| 2007-04-10 |
2007-09-17 |
+9.3624 |
-7.134 |
| 2007-09-17 |
2008-07-04 |
-5.1278 |
+3.059 |
| 2008-07-04 |
2008-10-24 |
+29.8486 |
-13.920 |
| 2009-01-03 |
2011-02-06 |
+1.0900 |
-0.233 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
05:05:25.98 |
+34:47:24.9 |
HIP 23797 |
22.65 |
| 2026-05-12 12:00 |
05:05:29.46 |
+34:47:27.6 |
HIP 23797 |
22.16 |
| 2026-05-13 00:00 |
05:05:32.95 |
+34:47:30.3 |
HIP 23797 |
21.68 |
| 2026-05-13 12:00 |
05:05:36.45 |
+34:47:33.1 |
HIP 23797 |
21.21 |
| 2026-05-14 00:00 |
05:05:39.97 |
+34:47:36.0 |
HIP 23797 |
20.76 |
| 2026-05-14 12:00 |
05:05:43.51 |
+34:47:39.0 |
HIP 23797 |
20.32 |
| 2026-05-15 00:00 |
05:05:47.05 |
+34:47:42.1 |
HIP 23797 |
19.90 |
| 2026-05-15 12:00 |
05:05:50.61 |
+34:47:45.2 |
HIP 23797 |
19.49 |
| 2026-05-16 00:00 |
05:05:54.18 |
+34:47:48.5 |
HIP 23797 |
19.11 |
| 2026-05-16 12:00 |
05:05:57.76 |
+34:47:51.8 |
HIP 23797 |
18.74 |
| 2026-05-17 00:00 |
05:06:01.35 |
+34:47:55.2 |
HIP 23797 |
18.40 |
| 2026-05-17 12:00 |
05:06:04.96 |
+34:47:58.7 |
HIP 23797 |
18.08 |
| 2026-05-18 00:00 |
05:06:08.58 |
+34:48:02.3 |
HIP 23797 |
17.79 |
| 2026-05-18 12:00 |
05:06:12.20 |
+34:48:06.0 |
HIP 23797 |
17.52 |
| 2026-05-19 00:00 |
05:06:15.84 |
+34:48:09.7 |
HIP 23797 |
17.29 |
| 2026-05-19 12:00 |
05:06:19.49 |
+34:48:13.6 |
HIP 23797 |
17.08 |
| 2026-05-20 00:00 |
05:06:23.15 |
+34:48:17.5 |
HIP 23797 |
16.91 |
| 2026-05-20 12:00 |
05:06:26.81 |
+34:48:21.5 |
HIP 23797 |
16.77 |
| 2026-05-21 00:00 |
05:06:30.49 |
+34:48:25.6 |
HIP 23797 |
16.66 |
| 2026-05-21 12:00 |
05:06:34.18 |
+34:48:29.8 |
HIP 23797 |
16.59 |
| 2026-05-22 00:00 |
05:06:37.87 |
+34:48:34.1 |
HIP 23797 |
16.55 |
| 2026-05-22 12:00 |
05:06:41.58 |
+34:48:38.4 |
HIP 23797 |
16.55 |
| 2026-05-23 00:00 |
05:06:45.29 |
+34:48:42.8 |
HIP 23797 |
16.59 |
| 2026-05-23 12:00 |
05:06:49.01 |
+34:48:47.4 |
HIP 23797 |
16.66 |
| 2026-05-24 00:00 |
05:06:52.74 |
+34:48:52.0 |
HIP 23797 |
16.77 |
| 2026-05-24 12:00 |
05:06:56.48 |
+34:48:56.6 |
HIP 23797 |
16.92 |
| 2026-05-25 00:00 |
05:07:00.22 |
+34:49:01.4 |
HIP 23797 |
17.10 |
| 2026-05-25 12:00 |
05:07:03.98 |
+34:49:06.3 |
HIP 23797 |
17.32 |
| 2026-05-26 00:00 |
05:07:07.73 |
+34:49:11.2 |
HIP 23797 |
17.57 |
| 2026-05-26 12:00 |
05:07:11.50 |
+34:49:16.2 |
HIP 23797 |
17.85 |
| 2026-05-27 00:00 |
05:07:15.27 |
+34:49:21.3 |
HIP 23797 |
18.16 |
| 2026-05-27 12:00 |
05:07:19.05 |
+34:49:26.5 |
HIP 23797 |
18.50 |
| 2026-05-28 00:00 |
05:07:22.83 |
+34:49:31.7 |
HIP 23797 |
18.87 |
| 2026-05-28 12:00 |
05:07:26.62 |
+34:49:37.0 |
HIP 23797 |
19.27 |
| 2026-05-29 00:00 |
05:07:30.42 |
+34:49:42.5 |
HIP 23797 |
19.69 |
| 2026-05-29 12:00 |
05:07:34.22 |
+34:49:48.0 |
HIP 23797 |
20.13 |
| 2026-05-30 00:00 |
05:07:38.03 |
+34:49:53.5 |
HIP 23797 |
20.60 |
| 2026-05-30 12:00 |
05:07:41.84 |
+34:49:59.2 |
HIP 23797 |
21.09 |
| 2026-05-31 00:00 |
05:07:45.65 |
+34:50:04.9 |
HIP 23797 |
21.59 |
| 2026-05-31 12:00 |
05:07:49.47 |
+34:50:10.8 |
HIP 23998 |
21.34 |
| 2026-06-01 00:00 |
05:07:53.30 |
+34:50:16.7 |
HIP 23998 |
20.55 |
| 2026-06-01 12:00 |
05:07:57.13 |
+34:50:22.6 |
HIP 23998 |
19.76 |
| 2026-06-02 00:00 |
05:08:00.96 |
+34:50:28.7 |
HIP 23998 |
18.97 |